AHSEC| CLASS 11| BIOLOGY| QUESTION PAPER - 2022| H.S.1ST YEAR
2022
BIOLOGY
(Theory)
Full Marks: 70
Pass Marks: 21
Time: 3 hours
The figures in the margin indicate
full marks for the questions
Use separate Answer-scripts for
Part-I (Botany) and Part-II (Zoology)
PART-I
(Botany)
(Marks: 35)
1. Where are the chlorophylls present in chloroplast? 1
2. Who proposed five-kingdom concept of living world? 1
3. What is herbarium'? 1
4. Name the cell organelle which has no membrane. 1
5. What are the significances of meiosis? 2
6. What are the pigments involved in photosynthesis? 2
7. What is cell theory? 2
8 Write what you mean by micronutrient and macronutrient
with examples. 2
9. Write the difference between xylem and phloem. 2
10. Lysosomes are regarded as suicidal bag of cell."
Explain. 3
Or
Explain with
diagram, the structure of a typical chromosome.
11. Draw and label different tissues revealed under the
transverse section of dorsiventral leaf. 3
Or
Explain with
diagram, the structure of a cell wall.
12. What do you mean by Kranz Anatomy? 3
Or
Write the
differences between heartwood and sapwood.
13. Distinguish between (any one): 3
(a) Stroma and
Thylakoid
(b) Light
reaction and Dark reaction
(c) Diffusion
and Osmosis
14. What do you mean by plant growth regulators? Mention few
roles of auxin. 1+3=4
Or
Describe the
alternation of generation with labelled diagram. 4
Or
What is Lichen?
Write the importance of Lichen. 1+3=4
15. What is Calvin cycle? Describe the different stages of
Calvin cycle. 5
Or
What do you mean
by light reaction of photosynthesis? Write the difference between cyclic
photophosphorylation and non-cyclic photophosphorylation. 1+4=5
Or
What is Krebs
cycle? Describe the different stages of Krebs cycle. 1+4=5
PART-II
(Zoology)
(Marks: 35)
1. Fill in the blanks (any five): 1x 5=5
(a) Mitochondria
is known as _______of cell.
(b) Alkaloids
are ______metabolites.
(c) Molecules
present in the cell is called _______.
(d) Echinoderms
are _______symmetrical.
(e) Protein part
of enzyme is called ______.
(f) Proteins are
the polymers of _____.
2. Give very short answers of the following (any four):
1×4=4
(a) Define cell
cycle.
(b) What is
axon?
(c) What is
muscular system?
(d) How is
oxygen carried in the blood?
(e) Which node
acts as pacemaker of the heart?
(f) Name one fat
splitting enzyme
(g) What are
neurons?
3. Write the differences between the following (any two):
2x2=4
(a) Blood and
Lymph
(b) Bone and
Cartilage
(c) Small and
Large intestine
(d) Exocrine and
Endocrine glands
(e) Voluntary
muscle and Involuntary muscle
(f) Essential and
Non-essential amino acids
4. Answer the following in brief (any three): 2x3=6
(a) Write the
names of bile pigments.
(b) Write about
cytoskeleton.
(c) Write the
four general characters of annelids.
(d) Write about
body symmetry.
(e) Mention few
biological significances of proteins.
(f) Write a
short note on oxygen-haemoglobin dissociation curve.
5. Write short notes on (any two): 3x2=6
(a) Chemical
nature of enzyme
(b) Nucleus
(c) Significance
of meiosis
(d) Reflex
action
(e) Nephron
(f) Mechanism of
enzyme action
6. Describe the digestive system of human with diagram.
4+1=5
Or
Classify the
enzymes in IUB system. 5
7. What is respiration? Describe the different types of
respiration. 1+4=5
Or
What is chemical
coordination? What are the hormones secreted by thyroid gland? Mention their functions.
1+2+2=5
***
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