Class 11 Biology Sample Question Paper- 6

 Page 1


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 6 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 6 
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. When is the coelom said to be a true coelom? [1] 
OR 
What kind of body cavity do the arthropods and nematodes have? 
 
2. What are oothecae? [1] 
 
3. Why is cellulose considered a homopolymer? [1] 
 
4. Name the connecting link between glycolysis and the Krebs cycle. [1] 
OR 
Name the enzymes which catalyse the incomplete oxidation of glucose in yeast. 
 
5. What is the name given to the bulb-like structures at axon terminals? [1] 
 
 
SECTION B 
 
6. Name two heterosporous ferns. Why are they called so? [2] 
 
7. What is the site of fat digestion in humans? Name the enzyme which digests fats. 
Mention the end-product of fat digestion. [2] 
 
Page 2


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 6 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 6 
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. When is the coelom said to be a true coelom? [1] 
OR 
What kind of body cavity do the arthropods and nematodes have? 
 
2. What are oothecae? [1] 
 
3. Why is cellulose considered a homopolymer? [1] 
 
4. Name the connecting link between glycolysis and the Krebs cycle. [1] 
OR 
Name the enzymes which catalyse the incomplete oxidation of glucose in yeast. 
 
5. What is the name given to the bulb-like structures at axon terminals? [1] 
 
 
SECTION B 
 
6. Name two heterosporous ferns. Why are they called so? [2] 
 
7. What is the site of fat digestion in humans? Name the enzyme which digests fats. 
Mention the end-product of fat digestion. [2] 
 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 6 
 
     
 
8. Why is the axoplasm of a resting axon negatively charged? [2] 
 
9. Amoeba multiplies by mitotic cell division. Is this phenomenon growth or 
reproduction?  [2] 
 
10. Differentiate between chromatin and chromosomes. [2] 
OR 
Mention two functions of the following:  
i. Polysaccharides 
ii. Amino acids 
 
11. State any two points of differences between adipose tissue and blood tissue.  [2] 
 
12. Draw a well-labelled diagram of a mitochondrion.  [2] 
OR 
List the functions of the cytoskeleton. 
 
 
SECTION C 
 
13. Name the type of fertilisation which is unique to angiosperms. Describe it. [3] 
OR 
Explain the modes of reproduction in Ulothrix. 
 
14. Name and explain the portal systems found in frogs. [3] 
 
15. Cork cambium forms tissues which form the cork. Do you agree with this statement? 
Explain. [3] 
 
16. How is a pinnately compound leaf different from a palmately compound leaf? [3] 
 
17. What is a cell wall? Mention the functions of a plant cell wall. [3] 
 
18. Draw a labelled diagram of chloroplast.  [3] 
OR 
Multicellular organisms have division of labour. Explain. 
 
19. Name the stage of the cell cycle at which one of the following events occur: [3]  
i. Chromosomes are moved to the spindle equator.  
ii. Centromere splits and chromatids separate.  
iii. Pairing between homologous chromosomes takes place.  
Page 3


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 6 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 6 
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. When is the coelom said to be a true coelom? [1] 
OR 
What kind of body cavity do the arthropods and nematodes have? 
 
2. What are oothecae? [1] 
 
3. Why is cellulose considered a homopolymer? [1] 
 
4. Name the connecting link between glycolysis and the Krebs cycle. [1] 
OR 
Name the enzymes which catalyse the incomplete oxidation of glucose in yeast. 
 
5. What is the name given to the bulb-like structures at axon terminals? [1] 
 
 
SECTION B 
 
6. Name two heterosporous ferns. Why are they called so? [2] 
 
7. What is the site of fat digestion in humans? Name the enzyme which digests fats. 
Mention the end-product of fat digestion. [2] 
 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 6 
 
     
 
8. Why is the axoplasm of a resting axon negatively charged? [2] 
 
9. Amoeba multiplies by mitotic cell division. Is this phenomenon growth or 
reproduction?  [2] 
 
10. Differentiate between chromatin and chromosomes. [2] 
OR 
Mention two functions of the following:  
i. Polysaccharides 
ii. Amino acids 
 
11. State any two points of differences between adipose tissue and blood tissue.  [2] 
 
12. Draw a well-labelled diagram of a mitochondrion.  [2] 
OR 
List the functions of the cytoskeleton. 
 
 
SECTION C 
 
13. Name the type of fertilisation which is unique to angiosperms. Describe it. [3] 
OR 
Explain the modes of reproduction in Ulothrix. 
 
14. Name and explain the portal systems found in frogs. [3] 
 
15. Cork cambium forms tissues which form the cork. Do you agree with this statement? 
Explain. [3] 
 
16. How is a pinnately compound leaf different from a palmately compound leaf? [3] 
 
17. What is a cell wall? Mention the functions of a plant cell wall. [3] 
 
18. Draw a labelled diagram of chloroplast.  [3] 
OR 
Multicellular organisms have division of labour. Explain. 
 
19. Name the stage of the cell cycle at which one of the following events occur: [3]  
i. Chromosomes are moved to the spindle equator.  
ii. Centromere splits and chromatids separate.  
iii. Pairing between homologous chromosomes takes place.  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 6 
 
     
 
20. What is a photosystem? Which is the pigment which acts as a reaction centre? [3] 
 
21. What is cretinism? Give any two causes of it. [3] 
OR 
Represent diagrammatically the action of the hormone oestrogen. 
 
22. Describe three disorders of the skeleton and joints. [3] 
 
23. What are the factors affecting the rate of diffusion? [3] 
 
24. What is imbibition pressure? What is the usefulness of imbibition pressure to seed 
germination?  [3] 
OR 
Explain the three physical properties of water which help in the ascent of sap in plants. 
 
SECTION D 
 
25. A portion of the cross-section of a leaf is shown in the diagram. Answer the following: [5] 
 
 
i. Label 1 to 4.  
ii. What kind of anatomy is shown in the diagram?  
iii. Write the structure and function of 2 and 4.  
OR 
List five main groups of natural plant growth regulators. Write a note on the discovery, 
physiological functions and agricultural/horticultural applications of any one of them. 
 
Page 4


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 6 
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 6 
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. When is the coelom said to be a true coelom? [1] 
OR 
What kind of body cavity do the arthropods and nematodes have? 
 
2. What are oothecae? [1] 
 
3. Why is cellulose considered a homopolymer? [1] 
 
4. Name the connecting link between glycolysis and the Krebs cycle. [1] 
OR 
Name the enzymes which catalyse the incomplete oxidation of glucose in yeast. 
 
5. What is the name given to the bulb-like structures at axon terminals? [1] 
 
 
SECTION B 
 
6. Name two heterosporous ferns. Why are they called so? [2] 
 
7. What is the site of fat digestion in humans? Name the enzyme which digests fats. 
Mention the end-product of fat digestion. [2] 
 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 6 
 
     
 
8. Why is the axoplasm of a resting axon negatively charged? [2] 
 
9. Amoeba multiplies by mitotic cell division. Is this phenomenon growth or 
reproduction?  [2] 
 
10. Differentiate between chromatin and chromosomes. [2] 
OR 
Mention two functions of the following:  
i. Polysaccharides 
ii. Amino acids 
 
11. State any two points of differences between adipose tissue and blood tissue.  [2] 
 
12. Draw a well-labelled diagram of a mitochondrion.  [2] 
OR 
List the functions of the cytoskeleton. 
 
 
SECTION C 
 
13. Name the type of fertilisation which is unique to angiosperms. Describe it. [3] 
OR 
Explain the modes of reproduction in Ulothrix. 
 
14. Name and explain the portal systems found in frogs. [3] 
 
15. Cork cambium forms tissues which form the cork. Do you agree with this statement? 
Explain. [3] 
 
16. How is a pinnately compound leaf different from a palmately compound leaf? [3] 
 
17. What is a cell wall? Mention the functions of a plant cell wall. [3] 
 
18. Draw a labelled diagram of chloroplast.  [3] 
OR 
Multicellular organisms have division of labour. Explain. 
 
19. Name the stage of the cell cycle at which one of the following events occur: [3]  
i. Chromosomes are moved to the spindle equator.  
ii. Centromere splits and chromatids separate.  
iii. Pairing between homologous chromosomes takes place.  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 6 
 
     
 
20. What is a photosystem? Which is the pigment which acts as a reaction centre? [3] 
 
21. What is cretinism? Give any two causes of it. [3] 
OR 
Represent diagrammatically the action of the hormone oestrogen. 
 
22. Describe three disorders of the skeleton and joints. [3] 
 
23. What are the factors affecting the rate of diffusion? [3] 
 
24. What is imbibition pressure? What is the usefulness of imbibition pressure to seed 
germination?  [3] 
OR 
Explain the three physical properties of water which help in the ascent of sap in plants. 
 
SECTION D 
 
25. A portion of the cross-section of a leaf is shown in the diagram. Answer the following: [5] 
 
 
i. Label 1 to 4.  
ii. What kind of anatomy is shown in the diagram?  
iii. Write the structure and function of 2 and 4.  
OR 
List five main groups of natural plant growth regulators. Write a note on the discovery, 
physiological functions and agricultural/horticultural applications of any one of them. 
 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 6 
 
     
 
26. In the given diagram of the alimentary canal of man, label five parts mentioned as (a) to 
(e) and give their functions.  [5]   
 
 
OR 
Draw a neat and labelled diagram of the human ear and explain its structure. 
 
27. Give a brief account of the counter-current mechanism.            [5] 
OR 
(a) Describe the role of haemoglobin in the transport of respiratory gases.  
(b) What is the function of carbonic anhydrase? Where is it operative?