Class 11 Biology Sample Question Paper- 1 | Biology Class 11 - NEET PDF Download

 Page 1


Time Allowed: 3 hours Maximum Marks: 70 
General Instructions:
1. All questions are compulsory.
2. The question paper has five sections and 33 questions. All questions are compulsory.
3. Section–A has 16 questions of 1 mark each; Section–B has 5 questions of 2 marks each; Section– C has 7
questions of 3 marks each; Section– D has 2 case-based questions of 4 marks each; and Section–E has 3 questions
of 5 marks each.
4. There is no overall choice. However, internal choices have been provided in some questions. A student has to
attempt only one of the alternatives in such questions.
5. Wherever necessary, neat and properly labeled diagrams should be drawn.
Section A
a) The name of the author who first described
the genus.
b) The name of the author who first described
the formation
c) The name of the author who first described
the subspecies.
d) The name of the author who first described
the species.
1. In Magnifera indica Linn, Linn denotes: [1]
a) 1.4 litres b) 15 litres
c) 18 litres d) 180 litres
2. What is the average amount of urine produced by a human in a day? [1]
a) 50 b) 100
c) 10 d) 20
3. Base pairs found in 5 turns of DNA spirals are _______. [1]
a) Pericycle b) Stele
c) Epidermis d) Endodermis
4. Epiblema of roots is equivalent to: [1]
a) Bronchitis b) Chalicosis
c) Siderosis d) Asthma
5. An ORD found chiefly among stonecutters due to inhalation of fine stone particles is named_______. [1]
6. Dark fixation of CO
2
 in CAM plants is called ossification because it produces: [1]
Page 1 of 12
Page 2


Time Allowed: 3 hours Maximum Marks: 70 
General Instructions:
1. All questions are compulsory.
2. The question paper has five sections and 33 questions. All questions are compulsory.
3. Section–A has 16 questions of 1 mark each; Section–B has 5 questions of 2 marks each; Section– C has 7
questions of 3 marks each; Section– D has 2 case-based questions of 4 marks each; and Section–E has 3 questions
of 5 marks each.
4. There is no overall choice. However, internal choices have been provided in some questions. A student has to
attempt only one of the alternatives in such questions.
5. Wherever necessary, neat and properly labeled diagrams should be drawn.
Section A
a) The name of the author who first described
the genus.
b) The name of the author who first described
the formation
c) The name of the author who first described
the subspecies.
d) The name of the author who first described
the species.
1. In Magnifera indica Linn, Linn denotes: [1]
a) 1.4 litres b) 15 litres
c) 18 litres d) 180 litres
2. What is the average amount of urine produced by a human in a day? [1]
a) 50 b) 100
c) 10 d) 20
3. Base pairs found in 5 turns of DNA spirals are _______. [1]
a) Pericycle b) Stele
c) Epidermis d) Endodermis
4. Epiblema of roots is equivalent to: [1]
a) Bronchitis b) Chalicosis
c) Siderosis d) Asthma
5. An ORD found chiefly among stonecutters due to inhalation of fine stone particles is named_______. [1]
6. Dark fixation of CO
2
 in CAM plants is called ossification because it produces: [1]
Page 1 of 12
a) Oxaloacetic acid b) Malic acid
c) Tartaric acid d) Formic acid
a) Slightly alkaline b) Slightly acidic
c) Neutral d) Highly alkaline
7. pH of urine under healthy conditions is: [1]
a) Ammonotelic in water and ureotelic on land b) Ureotelic
c) Uricotelic d) Ammonotelic
8. Frog shows which kind of excretion? [1]
a) 2 : 6-D and 2 : 2 :5 T b) 2 : 4-D and 2 : 4 :5 T
c) 2 : 2-D and 2 : 4 :6 T d) 2 : 5-D and 2 : 5 :5 T
9. In the wheat field, some broad-leaved weeds were seen by a farmer, which plant hormone would you suggest
getting rid of the same?
[1]
a) A structure in pteridophytes formed before
the thallus develops.
b) A sporophytic free-living structure formed
in pteridophytes.
c) A gametophyte free-living structure formed
in pteridophytes.
d) A primitive structure formed after
fertilization in pteridophytes.
10. A Prothallus is: [1]
a) Ammonotelic - Tadpole b) Uricotelic - Birds
c) Ureotelic - Elephant d) Ureotelic - Insects
11. Which of the following pairs is wrong? [1]
a)
Less H
+
 concentration
b) Low pCO
2
c) High pCO
2
d) High pO
2
12. The oxygen - haemoglobin dissociation curve will show a right shift in case of: [1]
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
13. Assertion (A): Bacteria do not always move with the help of flagella. 
Reason (R): Rotary motion of flagellum is employed by flagellated bacteria for movement. 
[1]
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
14. Assertion (A): Inspiration is initiated by the contraction of the diaphragm which increases the volume of the
thoracic chamber in the antero-posterior axis. 
Reason (R): The contraction of external intercostal muscles lifts up the ribs and the sternum causing an increase
in the volume of the thoracic chamber in the dorso-ventral axis.
[1]
15. Assertion (A): Elemental analysis gives the elemental composition of living tissues in the form of hydrogen, [1]
Page 2 of 12
Page 3


Time Allowed: 3 hours Maximum Marks: 70 
General Instructions:
1. All questions are compulsory.
2. The question paper has five sections and 33 questions. All questions are compulsory.
3. Section–A has 16 questions of 1 mark each; Section–B has 5 questions of 2 marks each; Section– C has 7
questions of 3 marks each; Section– D has 2 case-based questions of 4 marks each; and Section–E has 3 questions
of 5 marks each.
4. There is no overall choice. However, internal choices have been provided in some questions. A student has to
attempt only one of the alternatives in such questions.
5. Wherever necessary, neat and properly labeled diagrams should be drawn.
Section A
a) The name of the author who first described
the genus.
b) The name of the author who first described
the formation
c) The name of the author who first described
the subspecies.
d) The name of the author who first described
the species.
1. In Magnifera indica Linn, Linn denotes: [1]
a) 1.4 litres b) 15 litres
c) 18 litres d) 180 litres
2. What is the average amount of urine produced by a human in a day? [1]
a) 50 b) 100
c) 10 d) 20
3. Base pairs found in 5 turns of DNA spirals are _______. [1]
a) Pericycle b) Stele
c) Epidermis d) Endodermis
4. Epiblema of roots is equivalent to: [1]
a) Bronchitis b) Chalicosis
c) Siderosis d) Asthma
5. An ORD found chiefly among stonecutters due to inhalation of fine stone particles is named_______. [1]
6. Dark fixation of CO
2
 in CAM plants is called ossification because it produces: [1]
Page 1 of 12
a) Oxaloacetic acid b) Malic acid
c) Tartaric acid d) Formic acid
a) Slightly alkaline b) Slightly acidic
c) Neutral d) Highly alkaline
7. pH of urine under healthy conditions is: [1]
a) Ammonotelic in water and ureotelic on land b) Ureotelic
c) Uricotelic d) Ammonotelic
8. Frog shows which kind of excretion? [1]
a) 2 : 6-D and 2 : 2 :5 T b) 2 : 4-D and 2 : 4 :5 T
c) 2 : 2-D and 2 : 4 :6 T d) 2 : 5-D and 2 : 5 :5 T
9. In the wheat field, some broad-leaved weeds were seen by a farmer, which plant hormone would you suggest
getting rid of the same?
[1]
a) A structure in pteridophytes formed before
the thallus develops.
b) A sporophytic free-living structure formed
in pteridophytes.
c) A gametophyte free-living structure formed
in pteridophytes.
d) A primitive structure formed after
fertilization in pteridophytes.
10. A Prothallus is: [1]
a) Ammonotelic - Tadpole b) Uricotelic - Birds
c) Ureotelic - Elephant d) Ureotelic - Insects
11. Which of the following pairs is wrong? [1]
a)
Less H
+
 concentration
b) Low pCO
2
c) High pCO
2
d) High pO
2
12. The oxygen - haemoglobin dissociation curve will show a right shift in case of: [1]
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
13. Assertion (A): Bacteria do not always move with the help of flagella. 
Reason (R): Rotary motion of flagellum is employed by flagellated bacteria for movement. 
[1]
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
14. Assertion (A): Inspiration is initiated by the contraction of the diaphragm which increases the volume of the
thoracic chamber in the antero-posterior axis. 
Reason (R): The contraction of external intercostal muscles lifts up the ribs and the sternum causing an increase
in the volume of the thoracic chamber in the dorso-ventral axis.
[1]
15. Assertion (A): Elemental analysis gives the elemental composition of living tissues in the form of hydrogen, [1]
Page 2 of 12
Section B
Section C
Section D
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
oxygen, chlorine, carbon, etc. 
Reason (R): Wet weight is the weight of living tissue and the remains of living tissue after drying gives dry
weight.
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
16. Assertion (A): The amount of CO
2
 that can diffuse through the diffusion membrane per unit difference in partial
pressure is much higher compared to that of O
2
. 
Reason (R): The solubility of CO
2
 is 20-25 times higher than that of O
2
.
[1]
17. List out the functions of the ground tissue system. [2]
18. How do different senses work in frog? Explain in brief. [2]
19. What is the role of second messenger in protein hormone action? [2]
20. Why there is a need to standardise the system of naming of living organisms? [2]
21. Write the equation to express Cornelius van Niel's findings. [2]
OR
State the law proposed by Blackman for various factors operative for photosynthesis.
22. The male and female reproductive organs of several pteridophytes and gymnosperms are comparable to floral
structures of angiosperms. Make an attempt to compare the various reproductive parts of pteridophytes and
gymnosperms with reproductive structures of angiosperms.
[3]
23. Differentiate between an Insect and Spider. [3]
24. Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any
industry which manufactures the compounds by isolation. Find out who are the buyers.
[3]
25. State any three functions of indole acetic acid in plants. [3]
26. What makes the synovial joint freely movable? List any two types of synovial joints. [3]
27. Write the differences between:
a. Blood and Lymph
b. Open and Closed system of circulation
c. Systole and Diastole
d. P-wave and T-wave
[3]
OR
Why is there no mixing of deoxygenated and oxygenated blood in the human heart normally?
28. Briefly describe the structure of the Brain. [3]
29. Read the following text carefully and answer the questions that follow: 
The fungi constitute a unique kingdom of heterotrophic organisms. They show a great diversity in morphology
[4]
Page 3 of 12
Page 4


Time Allowed: 3 hours Maximum Marks: 70 
General Instructions:
1. All questions are compulsory.
2. The question paper has five sections and 33 questions. All questions are compulsory.
3. Section–A has 16 questions of 1 mark each; Section–B has 5 questions of 2 marks each; Section– C has 7
questions of 3 marks each; Section– D has 2 case-based questions of 4 marks each; and Section–E has 3 questions
of 5 marks each.
4. There is no overall choice. However, internal choices have been provided in some questions. A student has to
attempt only one of the alternatives in such questions.
5. Wherever necessary, neat and properly labeled diagrams should be drawn.
Section A
a) The name of the author who first described
the genus.
b) The name of the author who first described
the formation
c) The name of the author who first described
the subspecies.
d) The name of the author who first described
the species.
1. In Magnifera indica Linn, Linn denotes: [1]
a) 1.4 litres b) 15 litres
c) 18 litres d) 180 litres
2. What is the average amount of urine produced by a human in a day? [1]
a) 50 b) 100
c) 10 d) 20
3. Base pairs found in 5 turns of DNA spirals are _______. [1]
a) Pericycle b) Stele
c) Epidermis d) Endodermis
4. Epiblema of roots is equivalent to: [1]
a) Bronchitis b) Chalicosis
c) Siderosis d) Asthma
5. An ORD found chiefly among stonecutters due to inhalation of fine stone particles is named_______. [1]
6. Dark fixation of CO
2
 in CAM plants is called ossification because it produces: [1]
Page 1 of 12
a) Oxaloacetic acid b) Malic acid
c) Tartaric acid d) Formic acid
a) Slightly alkaline b) Slightly acidic
c) Neutral d) Highly alkaline
7. pH of urine under healthy conditions is: [1]
a) Ammonotelic in water and ureotelic on land b) Ureotelic
c) Uricotelic d) Ammonotelic
8. Frog shows which kind of excretion? [1]
a) 2 : 6-D and 2 : 2 :5 T b) 2 : 4-D and 2 : 4 :5 T
c) 2 : 2-D and 2 : 4 :6 T d) 2 : 5-D and 2 : 5 :5 T
9. In the wheat field, some broad-leaved weeds were seen by a farmer, which plant hormone would you suggest
getting rid of the same?
[1]
a) A structure in pteridophytes formed before
the thallus develops.
b) A sporophytic free-living structure formed
in pteridophytes.
c) A gametophyte free-living structure formed
in pteridophytes.
d) A primitive structure formed after
fertilization in pteridophytes.
10. A Prothallus is: [1]
a) Ammonotelic - Tadpole b) Uricotelic - Birds
c) Ureotelic - Elephant d) Ureotelic - Insects
11. Which of the following pairs is wrong? [1]
a)
Less H
+
 concentration
b) Low pCO
2
c) High pCO
2
d) High pO
2
12. The oxygen - haemoglobin dissociation curve will show a right shift in case of: [1]
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
13. Assertion (A): Bacteria do not always move with the help of flagella. 
Reason (R): Rotary motion of flagellum is employed by flagellated bacteria for movement. 
[1]
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
14. Assertion (A): Inspiration is initiated by the contraction of the diaphragm which increases the volume of the
thoracic chamber in the antero-posterior axis. 
Reason (R): The contraction of external intercostal muscles lifts up the ribs and the sternum causing an increase
in the volume of the thoracic chamber in the dorso-ventral axis.
[1]
15. Assertion (A): Elemental analysis gives the elemental composition of living tissues in the form of hydrogen, [1]
Page 2 of 12
Section B
Section C
Section D
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
oxygen, chlorine, carbon, etc. 
Reason (R): Wet weight is the weight of living tissue and the remains of living tissue after drying gives dry
weight.
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
16. Assertion (A): The amount of CO
2
 that can diffuse through the diffusion membrane per unit difference in partial
pressure is much higher compared to that of O
2
. 
Reason (R): The solubility of CO
2
 is 20-25 times higher than that of O
2
.
[1]
17. List out the functions of the ground tissue system. [2]
18. How do different senses work in frog? Explain in brief. [2]
19. What is the role of second messenger in protein hormone action? [2]
20. Why there is a need to standardise the system of naming of living organisms? [2]
21. Write the equation to express Cornelius van Niel's findings. [2]
OR
State the law proposed by Blackman for various factors operative for photosynthesis.
22. The male and female reproductive organs of several pteridophytes and gymnosperms are comparable to floral
structures of angiosperms. Make an attempt to compare the various reproductive parts of pteridophytes and
gymnosperms with reproductive structures of angiosperms.
[3]
23. Differentiate between an Insect and Spider. [3]
24. Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any
industry which manufactures the compounds by isolation. Find out who are the buyers.
[3]
25. State any three functions of indole acetic acid in plants. [3]
26. What makes the synovial joint freely movable? List any two types of synovial joints. [3]
27. Write the differences between:
a. Blood and Lymph
b. Open and Closed system of circulation
c. Systole and Diastole
d. P-wave and T-wave
[3]
OR
Why is there no mixing of deoxygenated and oxygenated blood in the human heart normally?
28. Briefly describe the structure of the Brain. [3]
29. Read the following text carefully and answer the questions that follow: 
The fungi constitute a unique kingdom of heterotrophic organisms. They show a great diversity in morphology
[4]
Page 3 of 12
and habitat. Fungi are cosmopolitan and occur in air, water, soil, and on animals and plants. They prefer to grow
in warm and humid places. Most fungi are heterotrophic and absorb soluble organic matter from dead substrates
and hence are called saprophytes. When a fungus reproduces sexually, two haploid hyphae of compatible mating
types come together and fuse. In some fungi, the fusion of two haploid cells immediately results in diploid cells
(2n). The fungiform fruiting bodies in which reduction division occurs, leading to the formation of haploid
spores. Symbionts - in association with algae as lichens and with roots of higher plants as mycorrhiza. 
i. Observe the given flow chart of reproduction and mention which steps involves in the sexual cycle of fungi.
(1)
ii. What is Rhizopus? Also, mention Rhizopus - wheat rush a correct match? (1)
iii. What is Mycorrhiza? And mention its function. (2) 
OR
In which form Fungi Stores Food Material? Do fungi have food vacuoles? (2)
30. Read the following text carefully and answer the questions that follow: 
Each flower normally has four floral whorls, viz., calyx, corolla, androecium and gynoecium. The calyx is the
outermost whorl of the flower and the members are called sepals. Corolla is composed of petals. Petals are
usually brightly coloured to attract insects for pollination. The mode of arrangement of sepals or petals in floral
bud with respect to the other members of the same whorl is known as aestivation. The main types of aestivation
are valvate, twisted, imbricate. The shape and colour of corolla vary greatly in plants. Corolla may be tubular,
bell- shaped, funnel-shaped or wheel-shaped and vexillary. 
i. Observe the given figure mentioned A, B, C and D. Also mention its function. Identify D and mention its
example. (1)
ii. Ganosepalous, Ganopetalous, Polysepalous, Polypetalous, Imbricate. (1)
iii. What is Valvate and twisted aestivation? (2) 
OR
[4]
Page 4 of 12
Page 5


Time Allowed: 3 hours Maximum Marks: 70 
General Instructions:
1. All questions are compulsory.
2. The question paper has five sections and 33 questions. All questions are compulsory.
3. Section–A has 16 questions of 1 mark each; Section–B has 5 questions of 2 marks each; Section– C has 7
questions of 3 marks each; Section– D has 2 case-based questions of 4 marks each; and Section–E has 3 questions
of 5 marks each.
4. There is no overall choice. However, internal choices have been provided in some questions. A student has to
attempt only one of the alternatives in such questions.
5. Wherever necessary, neat and properly labeled diagrams should be drawn.
Section A
a) The name of the author who first described
the genus.
b) The name of the author who first described
the formation
c) The name of the author who first described
the subspecies.
d) The name of the author who first described
the species.
1. In Magnifera indica Linn, Linn denotes: [1]
a) 1.4 litres b) 15 litres
c) 18 litres d) 180 litres
2. What is the average amount of urine produced by a human in a day? [1]
a) 50 b) 100
c) 10 d) 20
3. Base pairs found in 5 turns of DNA spirals are _______. [1]
a) Pericycle b) Stele
c) Epidermis d) Endodermis
4. Epiblema of roots is equivalent to: [1]
a) Bronchitis b) Chalicosis
c) Siderosis d) Asthma
5. An ORD found chiefly among stonecutters due to inhalation of fine stone particles is named_______. [1]
6. Dark fixation of CO
2
 in CAM plants is called ossification because it produces: [1]
Page 1 of 12
a) Oxaloacetic acid b) Malic acid
c) Tartaric acid d) Formic acid
a) Slightly alkaline b) Slightly acidic
c) Neutral d) Highly alkaline
7. pH of urine under healthy conditions is: [1]
a) Ammonotelic in water and ureotelic on land b) Ureotelic
c) Uricotelic d) Ammonotelic
8. Frog shows which kind of excretion? [1]
a) 2 : 6-D and 2 : 2 :5 T b) 2 : 4-D and 2 : 4 :5 T
c) 2 : 2-D and 2 : 4 :6 T d) 2 : 5-D and 2 : 5 :5 T
9. In the wheat field, some broad-leaved weeds were seen by a farmer, which plant hormone would you suggest
getting rid of the same?
[1]
a) A structure in pteridophytes formed before
the thallus develops.
b) A sporophytic free-living structure formed
in pteridophytes.
c) A gametophyte free-living structure formed
in pteridophytes.
d) A primitive structure formed after
fertilization in pteridophytes.
10. A Prothallus is: [1]
a) Ammonotelic - Tadpole b) Uricotelic - Birds
c) Ureotelic - Elephant d) Ureotelic - Insects
11. Which of the following pairs is wrong? [1]
a)
Less H
+
 concentration
b) Low pCO
2
c) High pCO
2
d) High pO
2
12. The oxygen - haemoglobin dissociation curve will show a right shift in case of: [1]
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
13. Assertion (A): Bacteria do not always move with the help of flagella. 
Reason (R): Rotary motion of flagellum is employed by flagellated bacteria for movement. 
[1]
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
14. Assertion (A): Inspiration is initiated by the contraction of the diaphragm which increases the volume of the
thoracic chamber in the antero-posterior axis. 
Reason (R): The contraction of external intercostal muscles lifts up the ribs and the sternum causing an increase
in the volume of the thoracic chamber in the dorso-ventral axis.
[1]
15. Assertion (A): Elemental analysis gives the elemental composition of living tissues in the form of hydrogen, [1]
Page 2 of 12
Section B
Section C
Section D
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
oxygen, chlorine, carbon, etc. 
Reason (R): Wet weight is the weight of living tissue and the remains of living tissue after drying gives dry
weight.
a) Both A and R are true and R is the correct
explanation of A.
b) Both A and R are true but R is not the
correct explanation of A.
c) A is true but R is false. d) A is false but R is true.
16. Assertion (A): The amount of CO
2
 that can diffuse through the diffusion membrane per unit difference in partial
pressure is much higher compared to that of O
2
. 
Reason (R): The solubility of CO
2
 is 20-25 times higher than that of O
2
.
[1]
17. List out the functions of the ground tissue system. [2]
18. How do different senses work in frog? Explain in brief. [2]
19. What is the role of second messenger in protein hormone action? [2]
20. Why there is a need to standardise the system of naming of living organisms? [2]
21. Write the equation to express Cornelius van Niel's findings. [2]
OR
State the law proposed by Blackman for various factors operative for photosynthesis.
22. The male and female reproductive organs of several pteridophytes and gymnosperms are comparable to floral
structures of angiosperms. Make an attempt to compare the various reproductive parts of pteridophytes and
gymnosperms with reproductive structures of angiosperms.
[3]
23. Differentiate between an Insect and Spider. [3]
24. Find and write down structures of 10 interesting small molecular weight biomolecules. Find if there is any
industry which manufactures the compounds by isolation. Find out who are the buyers.
[3]
25. State any three functions of indole acetic acid in plants. [3]
26. What makes the synovial joint freely movable? List any two types of synovial joints. [3]
27. Write the differences between:
a. Blood and Lymph
b. Open and Closed system of circulation
c. Systole and Diastole
d. P-wave and T-wave
[3]
OR
Why is there no mixing of deoxygenated and oxygenated blood in the human heart normally?
28. Briefly describe the structure of the Brain. [3]
29. Read the following text carefully and answer the questions that follow: 
The fungi constitute a unique kingdom of heterotrophic organisms. They show a great diversity in morphology
[4]
Page 3 of 12
and habitat. Fungi are cosmopolitan and occur in air, water, soil, and on animals and plants. They prefer to grow
in warm and humid places. Most fungi are heterotrophic and absorb soluble organic matter from dead substrates
and hence are called saprophytes. When a fungus reproduces sexually, two haploid hyphae of compatible mating
types come together and fuse. In some fungi, the fusion of two haploid cells immediately results in diploid cells
(2n). The fungiform fruiting bodies in which reduction division occurs, leading to the formation of haploid
spores. Symbionts - in association with algae as lichens and with roots of higher plants as mycorrhiza. 
i. Observe the given flow chart of reproduction and mention which steps involves in the sexual cycle of fungi.
(1)
ii. What is Rhizopus? Also, mention Rhizopus - wheat rush a correct match? (1)
iii. What is Mycorrhiza? And mention its function. (2) 
OR
In which form Fungi Stores Food Material? Do fungi have food vacuoles? (2)
30. Read the following text carefully and answer the questions that follow: 
Each flower normally has four floral whorls, viz., calyx, corolla, androecium and gynoecium. The calyx is the
outermost whorl of the flower and the members are called sepals. Corolla is composed of petals. Petals are
usually brightly coloured to attract insects for pollination. The mode of arrangement of sepals or petals in floral
bud with respect to the other members of the same whorl is known as aestivation. The main types of aestivation
are valvate, twisted, imbricate. The shape and colour of corolla vary greatly in plants. Corolla may be tubular,
bell- shaped, funnel-shaped or wheel-shaped and vexillary. 
i. Observe the given figure mentioned A, B, C and D. Also mention its function. Identify D and mention its
example. (1)
ii. Ganosepalous, Ganopetalous, Polysepalous, Polypetalous, Imbricate. (1)
iii. What is Valvate and twisted aestivation? (2) 
OR
[4]
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Section E
Which of the following shows imbricate? Explain imbricate aestivation? (2) 
31. With the help of suitable diagrams describe mitosis. [5]
OR
Explain, why a pair of homologous chromosomes is genetically different, but a pair of sister chromatids is genetically
identical before crossing over in meiosis.
32. Differentiate between Aerobic respiration and Fermentation. [5]
OR
Does pyruvic acid enter the Krebs’ cycle directly?
33. Give a detail description of plastids with the help of suitable diagram. [5]
OR
Discuss the basic structural organisation of a typical cell.
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