Assam Board Class 11 Question Paper 2023 Biology

ASSAM BOARD
QUESTION
PAPER
2023

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Total No. of Printed Pages-8
23EBIOL (BOT-Z00)

2023
BÊOLOGY
(Theory )
Full Marks : 70
Pass Marks : 21
Time:3 hours
questions
The figures in the margin indicate full marks for the
Use separate Answer-scripts for Part-I (Botany)
and Part II (Zoology)
ALLOTMENT OF MARKS
Part-I:Botany (Marks : 35)
1x5 = 5
Q. No. 1carries l mark each
2x5 = 10
0. No. 2carries 2 marks each
3x2 = 6
Q. Nos. 3 and 4 carry 3markS each
4
0. No. 5 carries 4 marks
0. No.6 carries 3 marks each 3x2 = 6
2x2 = 4
0. No. 7 carries 2 marks each
Total = 35

Part--II: Zoology ( Marks: 35)
Q. No. 1 carries 1 mark each 1x5 = 5
1x4 = 4
Q. No. 2carries 1mark each
2x2 = 4
Q. No. 3 carries 2 marks each
Q. No. 4 carries 2 marks each 2x3 = 6
Q. No. 5 carries 3 marks each 3x2 = 6
Q. Nos. 6and7 carry 5 marks each 5x2 =10
Total = 35
Total : Part-I &% Part-II 35+35 =70

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(2 )

PART9UN
Botany )
(
(3fYAMA)
Marks: 35 )
1, Write the answer oi the tolowing briefly
1x5=5

(a) What is binomial nomenclature?

(b) What is prothallus?
a'tg16 f?

(c) Namne 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?

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(3 )
(b) Write the characteristics of prokaryotic cell.

(c) Mention the two functions of corolla.

(d) Name the various types of aestivation.

(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/eRI
Draw and describe the structure of a seed.

6. Distinguish between the following (any two) : 3x2=6

(a) Heartwood and sapwood

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(4 )

(b) Xylem and phloem

fibrous root
(c) Taproot and

7. Write short notes on the following (any two): 2x2=4

(a) Thylakoid

(b) Cell wall

(c) Active transport

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(5 )

PART-II / S
(Zoology )
(enA)
Marks :35)

1×5-5
1. Fill in the blanks of the following (any fve) :

having
(a) Porifera is a group of animals which does not
system.

(b) Fertilization results in the formation of

(c) Urinary bladder is not present in

(d) Body of sea anemnones is symmetry.

(e) Nissl bodies are found in

) Enzymes act on protein is called

(g) Vasopressin is secreted by

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(6 )

2. Write very short answer oT the following (any four): 1x4=4

(a) What are the cellular Components of blood?

(b) What is destruction of Hbp

(c) What is bile?
forgeu ft ?

(a) Define essential amino acid.

(e) What are the actin and myosin?

() 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

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(7 )

(b) Prophase of mitosis and prophase of meioSiS

(c) Coenzyme and cofactor

(d) Breathing and respiration

2x3=6
4. Answer the following briefly (any three)

(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.

() What is reflex action? Give one example.

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(8 )

5. Write short notes on the following (any two) : 3×2=6

(a) Thyroid stimulating hormone (TSH)

(b) Nucleolus

(c) Neuron

(d) Digestive enzyme

6. Describe the process of digestion of food. 5

Or/ eI
Describe the structure and functions of human heart with
diagram. 1+2+2=5

7. Classify proteins with exxamples. 2+3=5

Or/ qeAI
Describe the structure and function of nephron with
diagram. 1+2+2=5

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