Class 11 Biology Sample Question Paper- 8

 Page 1


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 8  
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 8 
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. Why are urochordates also called tunicates? [1] 
OR 
What are parapodia? State their function. 
 
2. Why is a neem leaf called pinnately compound? [1] 
 
3. Name the polymer of fructose.  [1] 
 
4. What are the requirements needed for the chemiosmotic synthesis of ATP in 
chloroplasts? [1] 
OR 
What is an LHC? Where is it present? 
 
5. Which glands secrete sebum? [1] 
 
SECTION B 
 
6. Why are bryophytes called amphibians of the plant kingdom? [2] 
 
7. Mention any two types of vacuoles found in animal cells along with their functions. [2] 
 
8. How does the partial pressure of O2 (pO2) and CO2 (pCO2) affect the binding and 
dissociation of carbaminohaemoglobin?   [2] 
Page 2


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 8  
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 8 
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. Why are urochordates also called tunicates? [1] 
OR 
What are parapodia? State their function. 
 
2. Why is a neem leaf called pinnately compound? [1] 
 
3. Name the polymer of fructose.  [1] 
 
4. What are the requirements needed for the chemiosmotic synthesis of ATP in 
chloroplasts? [1] 
OR 
What is an LHC? Where is it present? 
 
5. Which glands secrete sebum? [1] 
 
SECTION B 
 
6. Why are bryophytes called amphibians of the plant kingdom? [2] 
 
7. Mention any two types of vacuoles found in animal cells along with their functions. [2] 
 
8. How does the partial pressure of O2 (pO2) and CO2 (pCO2) affect the binding and 
dissociation of carbaminohaemoglobin?   [2] 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 8  
 
     
 
9. What is emphysema? What causes it? [2] 
OR 
Amylase is secreted by two glands. Name them. What is the action of amylase on food? 
 
10. Write any two peculiar features of parasitic Platyhelminthes.           [2] 
 
11. List any two differences between fibrous roots and adventitious roots.          [2] 
OR 
Draw a diagram of mango indicating the arrangement of its pericarp. Describe its 
pericarp in short. 
 
12. What is crossing over? Name the enzyme responsible for it.            [2] 
 
SECTION C 
 
13. Distinguish between intracellular and extracellular digestion. [3] 
 
14. How many hearts are found in earthworm? Give their location in the body of the 
earthworm. [3] 
OR 
Describe the exoskeleton of cockroach. 
 
15. Draw a neat diagram of the digestive system of frog. [3] 
 
16. What is meant by modification of root? What type of modification of root is found in  [3] 
i. Banyan tree 
ii. Turnip 
iii. Mangrove trees 
 
17. Giving an example, describe the different types of amino acids based on the number of 
carboxyl and amino groups in them. [3] 
OR 
Draw the structures of 
a. Cholesterol 
b. Uracil 
c. Triglyceride 
 
 
18.     [3]  
i. What are nuclear pores? Mention their function. 
ii. What is interkinesis? 
  
Page 3


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 8  
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 8 
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. Why are urochordates also called tunicates? [1] 
OR 
What are parapodia? State their function. 
 
2. Why is a neem leaf called pinnately compound? [1] 
 
3. Name the polymer of fructose.  [1] 
 
4. What are the requirements needed for the chemiosmotic synthesis of ATP in 
chloroplasts? [1] 
OR 
What is an LHC? Where is it present? 
 
5. Which glands secrete sebum? [1] 
 
SECTION B 
 
6. Why are bryophytes called amphibians of the plant kingdom? [2] 
 
7. Mention any two types of vacuoles found in animal cells along with their functions. [2] 
 
8. How does the partial pressure of O2 (pO2) and CO2 (pCO2) affect the binding and 
dissociation of carbaminohaemoglobin?   [2] 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 8  
 
     
 
9. What is emphysema? What causes it? [2] 
OR 
Amylase is secreted by two glands. Name them. What is the action of amylase on food? 
 
10. Write any two peculiar features of parasitic Platyhelminthes.           [2] 
 
11. List any two differences between fibrous roots and adventitious roots.          [2] 
OR 
Draw a diagram of mango indicating the arrangement of its pericarp. Describe its 
pericarp in short. 
 
12. What is crossing over? Name the enzyme responsible for it.            [2] 
 
SECTION C 
 
13. Distinguish between intracellular and extracellular digestion. [3] 
 
14. How many hearts are found in earthworm? Give their location in the body of the 
earthworm. [3] 
OR 
Describe the exoskeleton of cockroach. 
 
15. Draw a neat diagram of the digestive system of frog. [3] 
 
16. What is meant by modification of root? What type of modification of root is found in  [3] 
i. Banyan tree 
ii. Turnip 
iii. Mangrove trees 
 
17. Giving an example, describe the different types of amino acids based on the number of 
carboxyl and amino groups in them. [3] 
OR 
Draw the structures of 
a. Cholesterol 
b. Uracil 
c. Triglyceride 
 
 
18.     [3]  
i. What are nuclear pores? Mention their function. 
ii. What is interkinesis? 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 8  
 
     
 
19.  [3] 
i. Describe the primary structure of protein. 
ii. Name the sugars present in nucleic acids. 
 
20. What is glycolysis? Name the two monosaccharides which readily enter the glycolytic 
pathway. [3] 
 
21. What is oxidative phosphorylation? Name the enzyme involved in this process and its 
location. [3] 
 
22. Describe the dentition found in an adult human. [3] 
OR 
What is succus entericus? State its role. 
 
23. What is the importance of plasma proteins? [3] 
OR 
Diffusion of gases occurs in the alveolar region only and not in the other parts of the 
respiratory system. Why? 
 
24. A cyclic process occurs in C3 plants which is light dependent and needs O2. This process 
does not produce energy but rather consumes energy.           [3] 
(a) Name the given process. 
(b) What are the end products of this process? 
(c) Where does it occur? 
 
 
SECTION D 
 
25. Describe the internal structure of a dorsiventral leaf with the help of labelled    
diagrams. [5] 
OR 
i. Draw a diagram to show the Hatch –Slack pathway. 
ii. Name two plants in which the C4 pathway occurs. 
iii. What is the first stable product of the C4 cycle? 
 
  
Page 4


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 8  
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 8 
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. Why are urochordates also called tunicates? [1] 
OR 
What are parapodia? State their function. 
 
2. Why is a neem leaf called pinnately compound? [1] 
 
3. Name the polymer of fructose.  [1] 
 
4. What are the requirements needed for the chemiosmotic synthesis of ATP in 
chloroplasts? [1] 
OR 
What is an LHC? Where is it present? 
 
5. Which glands secrete sebum? [1] 
 
SECTION B 
 
6. Why are bryophytes called amphibians of the plant kingdom? [2] 
 
7. Mention any two types of vacuoles found in animal cells along with their functions. [2] 
 
8. How does the partial pressure of O2 (pO2) and CO2 (pCO2) affect the binding and 
dissociation of carbaminohaemoglobin?   [2] 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 8  
 
     
 
9. What is emphysema? What causes it? [2] 
OR 
Amylase is secreted by two glands. Name them. What is the action of amylase on food? 
 
10. Write any two peculiar features of parasitic Platyhelminthes.           [2] 
 
11. List any two differences between fibrous roots and adventitious roots.          [2] 
OR 
Draw a diagram of mango indicating the arrangement of its pericarp. Describe its 
pericarp in short. 
 
12. What is crossing over? Name the enzyme responsible for it.            [2] 
 
SECTION C 
 
13. Distinguish between intracellular and extracellular digestion. [3] 
 
14. How many hearts are found in earthworm? Give their location in the body of the 
earthworm. [3] 
OR 
Describe the exoskeleton of cockroach. 
 
15. Draw a neat diagram of the digestive system of frog. [3] 
 
16. What is meant by modification of root? What type of modification of root is found in  [3] 
i. Banyan tree 
ii. Turnip 
iii. Mangrove trees 
 
17. Giving an example, describe the different types of amino acids based on the number of 
carboxyl and amino groups in them. [3] 
OR 
Draw the structures of 
a. Cholesterol 
b. Uracil 
c. Triglyceride 
 
 
18.     [3]  
i. What are nuclear pores? Mention their function. 
ii. What is interkinesis? 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 8  
 
     
 
19.  [3] 
i. Describe the primary structure of protein. 
ii. Name the sugars present in nucleic acids. 
 
20. What is glycolysis? Name the two monosaccharides which readily enter the glycolytic 
pathway. [3] 
 
21. What is oxidative phosphorylation? Name the enzyme involved in this process and its 
location. [3] 
 
22. Describe the dentition found in an adult human. [3] 
OR 
What is succus entericus? State its role. 
 
23. What is the importance of plasma proteins? [3] 
OR 
Diffusion of gases occurs in the alveolar region only and not in the other parts of the 
respiratory system. Why? 
 
24. A cyclic process occurs in C3 plants which is light dependent and needs O2. This process 
does not produce energy but rather consumes energy.           [3] 
(a) Name the given process. 
(b) What are the end products of this process? 
(c) Where does it occur? 
 
 
SECTION D 
 
25. Describe the internal structure of a dorsiventral leaf with the help of labelled    
diagrams. [5] 
OR 
i. Draw a diagram to show the Hatch –Slack pathway. 
ii. Name two plants in which the C4 pathway occurs. 
iii. What is the first stable product of the C4 cycle? 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 8  
 
     
 
26.  [5] 
i. What is a reflex arc? 
ii. Name the components of the reflex pathway. 
iii. Draw a diagram to show the knee-jerk reflex. 
OR 
Study the blood cells carefully shown in the figure and answer the following questions:  
 
 
 
i. Name the various types of blood cells labelled as (a), (b), (c), (d) and (e).    
ii. Give one important function of each.  
 
27.  Explain polarisation and depolarisation of the membrane of a nerve fibre.         [5] 
OR 
(a) Expand MSH. Where is it synthesised in the human body? Mention its function.  
(b) How does the thymus gland or thymosin play a major role in the development of 
immunity?