AHSEC| CLASS 11| BIOLOGY| QUESTION PAPER - 2023| H.S.1ST YEAR
2023
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. Write the answer of the following briefly: 1x 5=5
(a) What is
binomial nomenclature?
(b) What is
prothallus?
(c) Name one red
algae.
(d) What is
called by meristem?
(e) What is
hydroponics?
2. Write short answer of the following: 2x5=10
(a) What are the
five kingdoms of living world?
(b) Write the
characteristics of prokaryotic cell.
(c) Mention the
two functions of corolla.
(d) Name the
various types of activation.
(e) What are the
directions of translocation?
3. Write about the various modifications of stem. 3
4. Mitochondria are powerhouse of the cell.' Explain it. 3
5. Draw and describe the internal structure of chloroplast.
4
Or
Draw and
describe the structure of a seed.
6. Distinguish between the following (any two): 3x2=6
(a) Heartwood
and sapwood
(b) Xylem and
phloem
(c) Taproot and
fibrous root
7. Write short notes on the following (any two): 2x2=4
(a) Thylakoid
(b) Cell wall
(c) Active
transport
PART-II
(Zoology)
(Marks: 35)
1. Fill in the blanks of the following (any five): 1×5=5
(a) Porifera is
a group of animals which does not having _______system.
(b)
Fertilization results in the formation of _______.
(c) Urinary
bladder is not present in _______.
(d) Body of sea
anemones is ________symmetry.
(e) Nissl bodies
are found in ______.
(f) Enzymes act
on protein is called ________.
(g) Vasopressin
is secreted by ______.
2. Write very short answer of the following (any four)
1×4=4
(a) What are the
cellular components of blood?
(b) What is
destruction of Hb?
(c) What is
bile?
(d) Define
essential amino acid.
(e) What are the
actin and myosin?
(f) What is
carbon monoxide poisoning?
(g) Give one
example of competitive inhibitor.
3. Distinguish between the following (any two): 2x2=4
(a) Blood and
lymph
(b) Prophase of
mitosis and prophase of meiosis
(c) Coenzyme and
cofactor
(d) Breathing
and respiration
4. Answer the following briefly (any three): 2x3=6
(a) Write the
four characteristics of arthropods.
(b) What are the
factors influencing oxygen and carbon dioxide transport in the blood?
(c) Write the
functions of RBC.
(d) What are the
main excretory substances?
(e) Mention the
types of cellular movements.
(f) What is
reflex action? Give one example.
5. Write short notes on the following (any two): 3x2=6
(a) Thyroid
stimulating hormone (TSH)
(b) Nucleolus
(c) Neuron
(d) Digestive
enzyme
6. Describe the process of digestion of food. 5
Or
Describe the
structure and functions of human heart with diagram. 1+2+2=5
7. Classify proteins with examples. 2+3=5
Or
Describe the
structure and function of nephron with diagram. 1+2+2=5
***
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