Class 11 Biology Sample Question Paper- 4 | Biology Class 11 - NEET PDF Download

 Page 1


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 4  
 
     
  
CBSE 
Class XI Biology 
Sample Paper – 4 
Time: 3 hrs                                                                                                              Total marks: 70  
                                                                                                                           
 General instructions: 
1. All questions are compulsory. 
2. The question paper consists of four sections A, B, C and D. 
3. Internal choice is given in all the sections. A student has to attempt only one of the 
alternatives in such questions. 
4. Section A contains 5 questions of 1 mark each. 
5. Section B has 7 questions of 2 marks each. 
6. Section C is of 12 questions of 3 marks each. 
7. Section D has 3 questions of 5 marks each. 
8. Wherever necessary, the diagrams drawn should be neat and properly labelled. 
 
 
SECTION A 
 
1. Mention two places where methanogens are present. [1]  
 
2. What is the function of phloem parenchyma? [1] 
OR 
In the absence of a nucleus, how are the functions of a sieve tube maintained? 
 
3. Name two surface extensions in the bacterial cells which are not concerned with 
motility. [1] 
 
4. Why are majority of plant nutrient elements called mineral nutrients? [1] 
 
5. Name the cell which forms a myelin sheath for the nerve fibres in PNS. [1] 
OR 
Which type of neurons are found in the 
(a) dorsal root of a spinal nerve 
(b) ventral root of a spinal nerve 
 
  
Page 2


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 4  
 
     
  
CBSE 
Class XI Biology 
Sample Paper – 4 
Time: 3 hrs                                                                                                              Total marks: 70  
                                                                                                                           
 General instructions: 
1. All questions are compulsory. 
2. The question paper consists of four sections A, B, C and D. 
3. Internal choice is given in all the sections. A student has to attempt only one of the 
alternatives in such questions. 
4. Section A contains 5 questions of 1 mark each. 
5. Section B has 7 questions of 2 marks each. 
6. Section C is of 12 questions of 3 marks each. 
7. Section D has 3 questions of 5 marks each. 
8. Wherever necessary, the diagrams drawn should be neat and properly labelled. 
 
 
SECTION A 
 
1. Mention two places where methanogens are present. [1]  
 
2. What is the function of phloem parenchyma? [1] 
OR 
In the absence of a nucleus, how are the functions of a sieve tube maintained? 
 
3. Name two surface extensions in the bacterial cells which are not concerned with 
motility. [1] 
 
4. Why are majority of plant nutrient elements called mineral nutrients? [1] 
 
5. Name the cell which forms a myelin sheath for the nerve fibres in PNS. [1] 
OR 
Which type of neurons are found in the 
(a) dorsal root of a spinal nerve 
(b) ventral root of a spinal nerve 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 4  
 
     
  
SECTION B 
6.     [2] 
i. Name three poisonous snakes. 
ii. Why are they included in Class Reptilia? 
 
7. Mention any two types of vacuoles found in animal cells along with their functions. [2] 
OR 
What are nucleic acids? Name the two types of nucleic acids. 
 
8. Give two reasons why all minerals cannot be passively absorbed by the roots.  [2] 
 
9. Differentiate between absorption spectrum and action spectrum. [2] 
 
10. What is metagenesis? Mention an example which exhibits this phenomenon.  [2] 
 
11. Give one basic structural difference between phellogen and phelloderm.  [2] 
OR 
How is the study of plant anatomy useful to us? 
 
12. What is trihydroxy propane commonly called? Write its structural formula.  [2] 
 
 
SECTION C 
 
13. Ctenophora and Cnidaria are diploblastic animals, while Chordates, Annelids and 
Arthropods are triploblastic. [3] 
(a) What is meant by diploblastic animals? 
(b) What are triploblastic animals? 
(c) What value is represented here?  
 
14. Where is the gizzard located in a cockroach? Explain its muscular arrangement and give 
its function. [3] 
OR 
Name the three types of cell junctions found between the cells of the epithelial tissue. 
List the functions of these junctions. 
 
15.     [3] 
(a) What is the name given to the common axis where several leaflets are arranged? 
(b) What does it represent morphologically? 
(c) Give one difference between leaf and leaflet. 
  
Page 3


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 4  
 
     
  
CBSE 
Class XI Biology 
Sample Paper – 4 
Time: 3 hrs                                                                                                              Total marks: 70  
                                                                                                                           
 General instructions: 
1. All questions are compulsory. 
2. The question paper consists of four sections A, B, C and D. 
3. Internal choice is given in all the sections. A student has to attempt only one of the 
alternatives in such questions. 
4. Section A contains 5 questions of 1 mark each. 
5. Section B has 7 questions of 2 marks each. 
6. Section C is of 12 questions of 3 marks each. 
7. Section D has 3 questions of 5 marks each. 
8. Wherever necessary, the diagrams drawn should be neat and properly labelled. 
 
 
SECTION A 
 
1. Mention two places where methanogens are present. [1]  
 
2. What is the function of phloem parenchyma? [1] 
OR 
In the absence of a nucleus, how are the functions of a sieve tube maintained? 
 
3. Name two surface extensions in the bacterial cells which are not concerned with 
motility. [1] 
 
4. Why are majority of plant nutrient elements called mineral nutrients? [1] 
 
5. Name the cell which forms a myelin sheath for the nerve fibres in PNS. [1] 
OR 
Which type of neurons are found in the 
(a) dorsal root of a spinal nerve 
(b) ventral root of a spinal nerve 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 4  
 
     
  
SECTION B 
6.     [2] 
i. Name three poisonous snakes. 
ii. Why are they included in Class Reptilia? 
 
7. Mention any two types of vacuoles found in animal cells along with their functions. [2] 
OR 
What are nucleic acids? Name the two types of nucleic acids. 
 
8. Give two reasons why all minerals cannot be passively absorbed by the roots.  [2] 
 
9. Differentiate between absorption spectrum and action spectrum. [2] 
 
10. What is metagenesis? Mention an example which exhibits this phenomenon.  [2] 
 
11. Give one basic structural difference between phellogen and phelloderm.  [2] 
OR 
How is the study of plant anatomy useful to us? 
 
12. What is trihydroxy propane commonly called? Write its structural formula.  [2] 
 
 
SECTION C 
 
13. Ctenophora and Cnidaria are diploblastic animals, while Chordates, Annelids and 
Arthropods are triploblastic. [3] 
(a) What is meant by diploblastic animals? 
(b) What are triploblastic animals? 
(c) What value is represented here?  
 
14. Where is the gizzard located in a cockroach? Explain its muscular arrangement and give 
its function. [3] 
OR 
Name the three types of cell junctions found between the cells of the epithelial tissue. 
List the functions of these junctions. 
 
15.     [3] 
(a) What is the name given to the common axis where several leaflets are arranged? 
(b) What does it represent morphologically? 
(c) Give one difference between leaf and leaflet. 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 4  
 
     
  
16. Draw illustrations to bring out the anatomical difference between monocot root and 
dicot root. [3] 
OR 
Answer the following with reference to the anatomy of a dicot root: 
(a) Where is the pericycle located? 
(b) How are xylem vessels arranged? 
(c) Which type of cells constitute the cortex? 
 
17. What is cell wall? Mention the functions of a plant cell wall. [3] 
 
18. Describe the following: [3]  
(a) Synapsis  (b) Bivalent  (c) Chiasmata 
Draw a diagram to illustrate your answer. 
 
19. How does cytokinesis in plant cells differ from that in animal cells? [3] 
 
20. How is ubiquinone reduced in the electron transport system? Where is it located? [3] 
OR 
RuBisCO is an enzyme which acts as both carboxylase and oxygenase. Why do you think 
RuBisCO carries out more carboxylation in C4 plants? 
 
21. When any material or seeds are kept in water, they swell up. Name and define the 
phenomenon involved in this change. Describe the two conditions necessary for the 
phenomenon to occur. [3] 
 
22. What would happen if HCl was not secreted in the stomach? [3] 
 
23. What is the importance of plasma proteins? [3] 
OR 
Explain the process of transmission of a nerve impulse across a chemical synapse. 
 
24. What is the significance of the step-wise release of energy in respiration?  [3] 
  
  
Page 4


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 4  
 
     
  
CBSE 
Class XI Biology 
Sample Paper – 4 
Time: 3 hrs                                                                                                              Total marks: 70  
                                                                                                                           
 General instructions: 
1. All questions are compulsory. 
2. The question paper consists of four sections A, B, C and D. 
3. Internal choice is given in all the sections. A student has to attempt only one of the 
alternatives in such questions. 
4. Section A contains 5 questions of 1 mark each. 
5. Section B has 7 questions of 2 marks each. 
6. Section C is of 12 questions of 3 marks each. 
7. Section D has 3 questions of 5 marks each. 
8. Wherever necessary, the diagrams drawn should be neat and properly labelled. 
 
 
SECTION A 
 
1. Mention two places where methanogens are present. [1]  
 
2. What is the function of phloem parenchyma? [1] 
OR 
In the absence of a nucleus, how are the functions of a sieve tube maintained? 
 
3. Name two surface extensions in the bacterial cells which are not concerned with 
motility. [1] 
 
4. Why are majority of plant nutrient elements called mineral nutrients? [1] 
 
5. Name the cell which forms a myelin sheath for the nerve fibres in PNS. [1] 
OR 
Which type of neurons are found in the 
(a) dorsal root of a spinal nerve 
(b) ventral root of a spinal nerve 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 4  
 
     
  
SECTION B 
6.     [2] 
i. Name three poisonous snakes. 
ii. Why are they included in Class Reptilia? 
 
7. Mention any two types of vacuoles found in animal cells along with their functions. [2] 
OR 
What are nucleic acids? Name the two types of nucleic acids. 
 
8. Give two reasons why all minerals cannot be passively absorbed by the roots.  [2] 
 
9. Differentiate between absorption spectrum and action spectrum. [2] 
 
10. What is metagenesis? Mention an example which exhibits this phenomenon.  [2] 
 
11. Give one basic structural difference between phellogen and phelloderm.  [2] 
OR 
How is the study of plant anatomy useful to us? 
 
12. What is trihydroxy propane commonly called? Write its structural formula.  [2] 
 
 
SECTION C 
 
13. Ctenophora and Cnidaria are diploblastic animals, while Chordates, Annelids and 
Arthropods are triploblastic. [3] 
(a) What is meant by diploblastic animals? 
(b) What are triploblastic animals? 
(c) What value is represented here?  
 
14. Where is the gizzard located in a cockroach? Explain its muscular arrangement and give 
its function. [3] 
OR 
Name the three types of cell junctions found between the cells of the epithelial tissue. 
List the functions of these junctions. 
 
15.     [3] 
(a) What is the name given to the common axis where several leaflets are arranged? 
(b) What does it represent morphologically? 
(c) Give one difference between leaf and leaflet. 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 4  
 
     
  
16. Draw illustrations to bring out the anatomical difference between monocot root and 
dicot root. [3] 
OR 
Answer the following with reference to the anatomy of a dicot root: 
(a) Where is the pericycle located? 
(b) How are xylem vessels arranged? 
(c) Which type of cells constitute the cortex? 
 
17. What is cell wall? Mention the functions of a plant cell wall. [3] 
 
18. Describe the following: [3]  
(a) Synapsis  (b) Bivalent  (c) Chiasmata 
Draw a diagram to illustrate your answer. 
 
19. How does cytokinesis in plant cells differ from that in animal cells? [3] 
 
20. How is ubiquinone reduced in the electron transport system? Where is it located? [3] 
OR 
RuBisCO is an enzyme which acts as both carboxylase and oxygenase. Why do you think 
RuBisCO carries out more carboxylation in C4 plants? 
 
21. When any material or seeds are kept in water, they swell up. Name and define the 
phenomenon involved in this change. Describe the two conditions necessary for the 
phenomenon to occur. [3] 
 
22. What would happen if HCl was not secreted in the stomach? [3] 
 
23. What is the importance of plasma proteins? [3] 
OR 
Explain the process of transmission of a nerve impulse across a chemical synapse. 
 
24. What is the significance of the step-wise release of energy in respiration?  [3] 
  
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 4  
 
     
  
SECTION D 
 
25. Describe the transpiration pull model of water transport in plants. What are the factors 
influencing transpiration? How is it useful to plants? [5]    
OR 
What are the conditions necessary for fixation of atmospheric nitrogen by Rhizobium? 
What is the role of Rhizobium in N2 fixation? 
 
26. Give a brief account of the counter current mechanism. [5] 
OR 
i. Study the given figure of the respiratory passage and label parts a, b, c, d and e. 
ii. How many secondary bronchi are present in the right and left human lungs? 
iii. What is the approximate length and width of the human trachea? 
iv. What is the role of the epiglottis? 
v. In which body cavity are the lungs located? 
 
 
 
27. What is meant by a reflex arc? Mention its components in a proper sequence and their 
functions in a reflex action.                [5] 
OR 
Name the peptide hormones secreted by the gastrointestinal tract and mention their 
functions in detail. Give two examples of hyperglycaemic hormone.