Sample Question Paper for class 11th Biology (Annual Examination)

 Sample Question Paper for class 11th 

Biology (Annual Examination)

ANNUAL EXAMINATION

SUBJECT – BIOLOGY

CLASS – XI

Time: 3 Hrs                                                                                       M.M-70

 

General Instruction

1.     All questions are compulsory.

2.     The question paper comprises of four sections A, B, C, and D

3.     There is no overall choice however, internal choice has been provided in one question of 2 marks each, one question of 3 marks each and all the 4 questions of 5 marks category. Only one option in such questions is to be attempted.

4.     Section A contains 8 questions of one mark each.

5.     Section B is of 10 questions of two marks each.

6.     Section C is of 9 questions of three marks each.

7.     Section D is of 3 questions of five marks each.

8.     Draw diagram where ever necessary.

 

SECTION - A

1. What does identification mean?

2. Why are brown algae brown?

3. Look at the figure below and label –

i) The part that separates the embryo from the endosperm,

ii) The shield shaped cotyledon.

4. Where is electron transport system operative in mitochondria?

5. What is meant by glycosidic bond?

6. Define phycobionts and mycobionts.

 

7. At what stages of the cell cycle the following parameters change: a) No. of chromosomes      

    per cell b) Amount of DNA content per cell.

8. Define phyllotaxy.

SECTION-B

 

9. List two ways by which molecules of ATP are produced in Glycolysis during

    aerobic respiration.

10. What are the four categories of bacteria based on their shape?

11. What are cofactors? Name two types of cofactors.

12. Draw a labelled diagram of a bacteriophage.

Or

Draw a labelled diagram of a funaria plant.

13. Schematically represent haplo-diplontic life cycle..  

14. Describe the structures of Golgi complex?

15. Multicellular organisms show division of labour. Discuss.

16. Differentiate karyokinesis and cytokinesis.

17. What is meant by taxon and herbarium?

18. Give 4 differences between cyclic and non-cyclic photophosphorylation.

 

SECTION - C

 

19. What is activation energy? What effect does an enzyme have on activation        

      Energy?

20. All chordates are not vertebrates but all vertebrates are chordates. Justify. Name   

      the two super classes of the phylum vertebrata.

21. Describe PSI and PSII.

22. Draw a labelled diagram of fluid mosaic model of plasma membrane.

Or

      Give the structural formula of a) Glycine, b) Alanine and c) Serine .

23. How chromosomes are classified based on the position of centromere?

24. Describe competitive inhibition of enzyme activity with an example.

25. Describe the process of crossing over. What is its significance?

26. Enumerate the important universal rules of nomenclature.

27. Read the following passage and answer any the questions:

The prokaryotic cells are smaller and multiply more rapidly than the eukaryotic cells. They may vary greatly in shape and size. The organization of prokaryotic cell is fundamentally similar even though prokaryotes exhibit a wide variety of shape and function. Most prokaryotic cells, particularly bacterial cells, have a chemically complex cell envelope.

i) Which is the outermost layer of the cell envelope in prokaryotes?

a) Glycocalyx.

b) Cell wall

c) Plasma membrane.

d) Mesosome

ii) Bacteria can be classified into........... groups on the basis of the differences in the cell envelope and the manner in which they respond to the staining procedure developed by Gram

a) Two

b) Three

c) Five

d) Four

iii) A special membranous structure called............ is formed by the extensions of the plasma membrane into the prokaryotic cell.

a) Golgi bodies

b) Ribosomes

c) Mesososmes

d) Inclusion bodies

iv) They........ are small bristle like fibres sprouting out of the cell.

a) Pili

b) Flagellum

c) Pseudopodium

d) Fimbri

v) The genetic material of the Prokaryotic cell is known as

a) Nucleiod.

b) Nucleus

c) DNA

d) RNA

vi) Among these which one is the prokaryotic cell

a) Plant cell

b) Animal cell

c) Amoeba

d) Euglena

SECTION – D

 

28. Explain different types of plastids, their pigments and functions

Or

Describe the events that take place in an interphase.

 

29. Explain chemiosmosis hypothesis of ATP formation.

Or

Describe briefly the chemical steps in Calvin cycle.

30. Write a note on proteins. Name some important proteins found in humans. Give their

 

       functions.

Or

Draw a labelled diagram of the detailed structure of a nephron.