MBOSE Class 11 Question Paper 2022 for Biology

Total No. of Printed Pages –– 7 (2)
SECTION – A1
2022
Choose the correct answer : 1  5=5
BIOLOGY
1. To which of the following categories does adipose 1
( Theory ) tissue belong?

Full Marks : 70 (i) Epithelial
Time : 3 hours (ii) Connective

(iii) Muscular
General Instructions :
(iv) Neural
This question paper consists of 5 (five) sections:

(i) Section A consists of two parts A1 and A2.
2. The functions of heterocysts include 1
A1 consists of 5 (five) questions (Q1 – Q5) which are multiple
choice questions, of one mark each; should be answered (i) Recycling nutrients
together in one place.
(ii) Nitrogen fixation
A2 consists of 5 (five) questions (Q6 – Q10) of one mark
each, to be answered in one word or one sentence. (iii) Help in photosynthesis

(ii) Section B consists of 7 (seven) questions (Q11 to Q17) of (iv) All the above.
two marks; to be answered in approximately 20 – 30 words
each.
3. Enzymes act as a catalyst in a reaction by 1
(iii) Section C consists of 9 (nine) questions (Q18 – Q26) of
three marks each to be answered in 30 – 50 words each. (i) Bringing down activation of energy

(iv) Section D consists of 1 (one) question (Q27) of 4 marks, to (ii) Changing the pH value
be answered in approximately 70 – 100 words.
(iii) Changing the active site
(v) Section E consists of 3 (three) questions (Q28 to Q30) of 5
marks each, to be answered in approximately 80 – 120 words. (iv) Interfering with integral proteins.

HS/XI/Sc/Bio/22 HS/XI/Sc/Bio/22

(3) (4)

4. Plasmolysis occurs when 1 SECTION – B

(i) Water enters into the cell ( Short answer – I) 2  7 = 14
(ii) Water concentration is equal
11. Either
(iii) Water moves out of the cell
(iv) None of the above. Name the phylum to which Starfish and Sponge belong.
1+1=2
Or
5. Animals in which the cells are arranged in two What are the diagnostic characteristics of chordates? 2
embryonic layers are called 1
(i) Monoblastic
12. Draw a labelled diagram of myelinated neurons. 2
(ii) Diploblastic
(iii) Triploblastic 13. Draw a labelled diagram of chloroplast. 2
(iv) Coelomate.
14. What is the nature of cell walls in diatoms? 2

SECTION – A2
15. Define enzyme. Give one example. 1+1=2
( Very short answer ) 1  5=5

16. What are trichomes? 2
6. What are parasites? 1

7. Define bilateral symmetry. 1 17. Either

8. Write the floral formula of Solanaceae family. 1 Write the functions of mitochondria. 2

Or
9. Define osmoregulation. 1
What is Respiratory quotient? Write the value of R.Q.
10. What is Glomerulonephritis? 1
for protein. 1+1=2

HS/XI/Sc/Bio/22 HS/XI/Sc/Bio/22

(5) (6)

SECTION –– C 25. What is chiasmata? What is the significance of meiosis?
( Short answer – II ) 3  9 = 27 1+2=3

26. Briefly describe the simple epithelial tissues. 3
18. Either
Explain the mechanism of breathing in humans. Or
3
Or Describe the mechanism of digestion of carbohydrates. 3
Differentiate between prokaryotic and eukaryotic cells. 3

19. Briefly describe the different structures of protein. 3
SECTION – D

20. What are hormones? Name the different endocrine 27. Define oxygen dissociation curve. Discuss the factors
glands in human. 1+ 2=3 affecting Oxygen dissociation curve. 1+3=4

21. Write the composition of mammalian blood. What are
the main functions of different blood cells. 1½ + 1½ = 3
SECTION – E

( Long answer type ) 5  3 = 15
22. What do you understand by photoperiodism and
vernalisation? 1½ + 1½ = 3
28. Either

Describe the different types of vascular bundles in
23. What are the steps involved in formation of a root plants with the help of labelled diagrams. 3+2=5
nodule? 3
Or
Name the five main groups of natural plant growth
24. What role does root pressure play in water movements regulators. Write the physiological effects of any two
in plants? 3 of them. 1+2+2=5

HS/XI/Sc/Bio/22 HS/XI/Sc/Bio/22

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29. Either
Mention the characteristics of phylum Mollusca. 5
Or
Draw a labelled diagram of human eye. Differentiate
between rods and cones. 3+2=5

30. Either
Describe the non-cyclic photophosphorylation in
plants. 5
Or
Name the different types of muscles. With a labelled
diagram, briefly describe the structure of skeletal
muscle. 1+4=5

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