Class 11 Biology Sample Question Paper- 5 | Biology Class 11 - NEET PDF Download

 Page 1


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 5  
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 5 
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. What is the grass-green colour of green algae due to? [1] 
 
2. What is the function of the ciliated epithelium in the human body? [1] 
 
3. What are dyads? [1] 
OR 
If a tissue has at a given time 1024 cells, then how many cycles of mitosis have the 
original parental single cell undergone? 
 
4. Name the enzyme which catalyses the phosphorylation of glucose. [1] 
 
5. Where are the taste buds located on our tongue? [1] 
OR 
Name the structure which regulates the opening of the oesophagus into the stomach. 
 
 
SECTION B 
 
6. Mention any four features present in animals grouped under Phylum Mollusca.  [2] 
 
7. Differentiate between the morphology of stem and root.  [2] 
 
8. What are kinetochores? What is their function?  [2] 
Page 2


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 5  
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 5 
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. What is the grass-green colour of green algae due to? [1] 
 
2. What is the function of the ciliated epithelium in the human body? [1] 
 
3. What are dyads? [1] 
OR 
If a tissue has at a given time 1024 cells, then how many cycles of mitosis have the 
original parental single cell undergone? 
 
4. Name the enzyme which catalyses the phosphorylation of glucose. [1] 
 
5. Where are the taste buds located on our tongue? [1] 
OR 
Name the structure which regulates the opening of the oesophagus into the stomach. 
 
 
SECTION B 
 
6. Mention any four features present in animals grouped under Phylum Mollusca.  [2] 
 
7. Differentiate between the morphology of stem and root.  [2] 
 
8. What are kinetochores? What is their function?  [2] 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 5  
 
     
 
9. Describe the 9+2 pattern of organisation in the axoneme of cilia/flagella. [2] 
OR 
Give the specific scientific terms for the following:  
(a) Cluster of ribosomes found in the cytoplasm. 
(b) Extensive infoldings of the inner membrane of the mitochondria. 
(c) Stacks of closely packed thylakoids. 
(d) Stalked particles on the inner membrane of the mitochondria. 
 
10. In what form do plants absorb magnesium from the soil? List any two magnesium 
deficiency symptoms observed in leaves. [2] 
OR 
Name four elements whose deficiency causes necrosis.  
 
11. Why does the colour of a leaf kept in the dark frequently become yellow or pale green? 
Which pigment do you think is more stable? [2] 
 
12. Mention any two economic uses of agar.  [2] 
 
 
SECTION C 
 
13. Angiosperms and gymnosperms are seed-producing plants. Although what we eat from 
Pinus plants (Chilgoza) are called dry fruits, they are not fruits. [3] 
(a) Why are fruits not formed in gymnosperms? 
(b) What are the two types of seeds found in Angiosperms with reference to the number 
of cotyledons? Give one example of each. 
(c) What value do we learn from these differences?  
 
14. Differentiate between brush-bordered epithelium and ciliated epithelium. [3] 
 
15. Mention the special features of the eye in cockroach. [3] 
OR 
Complete the following statements: 
(a) In cockroach, grinding of food particles is performed by __________________. 
(b) Hindgut of cockroach is differentiated into __________________, __________________ and 
__________________. 
(c) In cockroach, blood vessels open into spaces called __________________. 
 
  
16. How is the study of plant anatomy useful to us? [3] 
 
17. Describe the primary structure of proteins. [3] 
Page 3


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 5  
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 5 
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. What is the grass-green colour of green algae due to? [1] 
 
2. What is the function of the ciliated epithelium in the human body? [1] 
 
3. What are dyads? [1] 
OR 
If a tissue has at a given time 1024 cells, then how many cycles of mitosis have the 
original parental single cell undergone? 
 
4. Name the enzyme which catalyses the phosphorylation of glucose. [1] 
 
5. Where are the taste buds located on our tongue? [1] 
OR 
Name the structure which regulates the opening of the oesophagus into the stomach. 
 
 
SECTION B 
 
6. Mention any four features present in animals grouped under Phylum Mollusca.  [2] 
 
7. Differentiate between the morphology of stem and root.  [2] 
 
8. What are kinetochores? What is their function?  [2] 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 5  
 
     
 
9. Describe the 9+2 pattern of organisation in the axoneme of cilia/flagella. [2] 
OR 
Give the specific scientific terms for the following:  
(a) Cluster of ribosomes found in the cytoplasm. 
(b) Extensive infoldings of the inner membrane of the mitochondria. 
(c) Stacks of closely packed thylakoids. 
(d) Stalked particles on the inner membrane of the mitochondria. 
 
10. In what form do plants absorb magnesium from the soil? List any two magnesium 
deficiency symptoms observed in leaves. [2] 
OR 
Name four elements whose deficiency causes necrosis.  
 
11. Why does the colour of a leaf kept in the dark frequently become yellow or pale green? 
Which pigment do you think is more stable? [2] 
 
12. Mention any two economic uses of agar.  [2] 
 
 
SECTION C 
 
13. Angiosperms and gymnosperms are seed-producing plants. Although what we eat from 
Pinus plants (Chilgoza) are called dry fruits, they are not fruits. [3] 
(a) Why are fruits not formed in gymnosperms? 
(b) What are the two types of seeds found in Angiosperms with reference to the number 
of cotyledons? Give one example of each. 
(c) What value do we learn from these differences?  
 
14. Differentiate between brush-bordered epithelium and ciliated epithelium. [3] 
 
15. Mention the special features of the eye in cockroach. [3] 
OR 
Complete the following statements: 
(a) In cockroach, grinding of food particles is performed by __________________. 
(b) Hindgut of cockroach is differentiated into __________________, __________________ and 
__________________. 
(c) In cockroach, blood vessels open into spaces called __________________. 
 
  
16. How is the study of plant anatomy useful to us? [3] 
 
17. Describe the primary structure of proteins. [3] 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 5  
 
     
 
18. Write any two characteristics of the mitochondria and draw a labelled diagram of it. 
OR 
What are nuclear pores? Write their functions. 
 
19. List the main differences between mitosis and meiosis. [3] 
 
20. Explain the apoplastic movement of water in plants.  [3] 
OR 
Describe the role played by protein pumps during active transport in plants. 
 
21. How is ubiquinone reduced in the electron transport system? Where is it located? [3] 
 
22. List the three major forms in which carbon dioxide is transported in our blood. [3] 
 
23. Because of some physiological reasons, the blood glucose level of an otherwise normal 
person has shot up above normal. How will this condition be returned to normal 
through hormone action? [3] 
 
24. Give the chemical name of one example of each of the following and mention one 
function of each of them:  [3] 
(a) Natural auxins 
(b) Synthetic auxins 
(c) Gaseous plant hormones 
OR 
‘All elements that are present in a plant need not be essential for its survival’. Comment.  
 
SECTION D 
 
25. Explain why [5] 
(a) Exogenous application of auxin fails to enhance the growth of intact plants.  
(b) Vitamins are not considered plant growth hormones.  
(c) It is appropriate to call a short-day plant a long-night plant.  
(d) Plants belonging to halophytes and growing in marshy lands face great difficulty in 
germination.  
(e) Gibberellins do not enhance the growth of isolated plant parts.  
OR 
(a) With the help of well-labelled diagrams, describe the process of plasmolysis in 
plants, giving appropriate examples.  
(b) Explain what will happen to a plant cell if it is kept in a solution with higher water 
potential. 
 
  
Page 4


  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 5  
 
     
 
CBSE 
Class XI Biology 
Sample Paper – 5 
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. What is the grass-green colour of green algae due to? [1] 
 
2. What is the function of the ciliated epithelium in the human body? [1] 
 
3. What are dyads? [1] 
OR 
If a tissue has at a given time 1024 cells, then how many cycles of mitosis have the 
original parental single cell undergone? 
 
4. Name the enzyme which catalyses the phosphorylation of glucose. [1] 
 
5. Where are the taste buds located on our tongue? [1] 
OR 
Name the structure which regulates the opening of the oesophagus into the stomach. 
 
 
SECTION B 
 
6. Mention any four features present in animals grouped under Phylum Mollusca.  [2] 
 
7. Differentiate between the morphology of stem and root.  [2] 
 
8. What are kinetochores? What is their function?  [2] 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 5  
 
     
 
9. Describe the 9+2 pattern of organisation in the axoneme of cilia/flagella. [2] 
OR 
Give the specific scientific terms for the following:  
(a) Cluster of ribosomes found in the cytoplasm. 
(b) Extensive infoldings of the inner membrane of the mitochondria. 
(c) Stacks of closely packed thylakoids. 
(d) Stalked particles on the inner membrane of the mitochondria. 
 
10. In what form do plants absorb magnesium from the soil? List any two magnesium 
deficiency symptoms observed in leaves. [2] 
OR 
Name four elements whose deficiency causes necrosis.  
 
11. Why does the colour of a leaf kept in the dark frequently become yellow or pale green? 
Which pigment do you think is more stable? [2] 
 
12. Mention any two economic uses of agar.  [2] 
 
 
SECTION C 
 
13. Angiosperms and gymnosperms are seed-producing plants. Although what we eat from 
Pinus plants (Chilgoza) are called dry fruits, they are not fruits. [3] 
(a) Why are fruits not formed in gymnosperms? 
(b) What are the two types of seeds found in Angiosperms with reference to the number 
of cotyledons? Give one example of each. 
(c) What value do we learn from these differences?  
 
14. Differentiate between brush-bordered epithelium and ciliated epithelium. [3] 
 
15. Mention the special features of the eye in cockroach. [3] 
OR 
Complete the following statements: 
(a) In cockroach, grinding of food particles is performed by __________________. 
(b) Hindgut of cockroach is differentiated into __________________, __________________ and 
__________________. 
(c) In cockroach, blood vessels open into spaces called __________________. 
 
  
16. How is the study of plant anatomy useful to us? [3] 
 
17. Describe the primary structure of proteins. [3] 
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 5  
 
     
 
18. Write any two characteristics of the mitochondria and draw a labelled diagram of it. 
OR 
What are nuclear pores? Write their functions. 
 
19. List the main differences between mitosis and meiosis. [3] 
 
20. Explain the apoplastic movement of water in plants.  [3] 
OR 
Describe the role played by protein pumps during active transport in plants. 
 
21. How is ubiquinone reduced in the electron transport system? Where is it located? [3] 
 
22. List the three major forms in which carbon dioxide is transported in our blood. [3] 
 
23. Because of some physiological reasons, the blood glucose level of an otherwise normal 
person has shot up above normal. How will this condition be returned to normal 
through hormone action? [3] 
 
24. Give the chemical name of one example of each of the following and mention one 
function of each of them:  [3] 
(a) Natural auxins 
(b) Synthetic auxins 
(c) Gaseous plant hormones 
OR 
‘All elements that are present in a plant need not be essential for its survival’. Comment.  
 
SECTION D 
 
25. Explain why [5] 
(a) Exogenous application of auxin fails to enhance the growth of intact plants.  
(b) Vitamins are not considered plant growth hormones.  
(c) It is appropriate to call a short-day plant a long-night plant.  
(d) Plants belonging to halophytes and growing in marshy lands face great difficulty in 
germination.  
(e) Gibberellins do not enhance the growth of isolated plant parts.  
OR 
(a) With the help of well-labelled diagrams, describe the process of plasmolysis in 
plants, giving appropriate examples.  
(b) Explain what will happen to a plant cell if it is kept in a solution with higher water 
potential. 
 
  
  
 
CBSE XI  |  BIOLOGY 
Sample Paper – 5  
 
     
 
26. Briefly describe the structure of the eye with the help of a diagram. [5] 
OR 
i. What is meant by double circulation? Illustrate with the help of a diagram.  
ii. What is its significance? 
 
27. How does the butter in your food get digested and absorbed in the body? 
OR 
An Rh-negative woman is carrying an Rh-positive foetus for the second time. Describe 
the consequences of Rh-incompatibility in this case.