ASSEB Class 11 Biology 2021 Question Paper [H.S 1st Year Biology Science Question Paper]

AHSEC Class 11 Biology Question Paper 2021 – Assam Board Science Question Paper 

Are you looking for the ASSEB erstwhile AHSEC Class 11 Biology Question Paper 2021 for the Assam Board Science stream?

Here, we have a simple analysis of the HS 1st Year Biology Question Paper 2021 in PDF under the Assam Higher Secondary Education Council (AHSEC), now known as the Assam State School Education Board (ASSEB).

The Assam Board Class 11 Biology Previous Year Question Paper 2021 is a useful resource for students preparing for their ASSEB Division-I board exams. It helps students understand the exam pattern, marks distribution, and important topics. By practicing this paper, students can improve their preparation and perform better in exams. Basically this Question Paper is based on Old Pattern but helpful for Theory part of Class 11 Biology Exam.

This question paper follows the new exam pattern and can be helpful for ASSEB Class 11 Science students of the Assam Board.

2021

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. Who proposed binomial nomenclature? 1

4. In which phase of cell cycle DNA synthesis occurs? 1

5. Write the characteristics of Monera. 2

6. What are the significances of meiosis? 2

7. What is cambium? What are the functions of it? 1+1=2

8. What are the pigments involved in photosynthesis? 2

9. Distinguish between (any one): 3

(a) Stroma and Thylakoid

(b) Light reaction and Dark reaction

10. Draw and label the different tissues revealed under transverse section of a dorsiventral leaf. 3

11. “Lysosomes are regarded as suicidal bag of cell.” Explain. 3

Or

Explain with diagram on the structure of a typical chromosome.

12. Write the differences between Xylem and Phloem. 2

13. What do you mean by Kranz Anatomy'? 2

14. With diagram, describe the alternation of generation. 4

Or

Write the different types of five-kingdom system of classification.

15. 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 Calvin cycle? Describe the different stages of Calvin cycle. 5

PART - II

(Zoology)

(Marks: 35)

1. Fill in the blanks: 1×5=5

(a) Echinoderms are _______symmetrical.

(b) Non-protein part of enzymes is called ______.

(c) Alkaloids are _____.

(d) Mitochondria is known as _______of cell.

(e) Molecules present in the cell is called _______.

2. Give very short answers of the following (any four): 1×4=4

(a) Define cell cycle.

(b) What is axon?

(c) Name one fat splitting enzyme.

(d) Which node acts as a pacemaker of the heart?

(e) How is oxygen carried in the blood?

(f) What is muscular system?

3. Write the differences between the following (any two): 2x2=4

(a) Bone and Cartilage

(b) Exocrine and Endocrine glands

(c) Small and Large intestine

(d) Red blood corpuscle and White blood corpuscle

4. Answer the following briefly (any three): 2×3=6

(a) Write the four general characters of annelids.

(b) Write the names of bile pigments.

(c) Write a note on oxygen haemoglobin dissociation curve.

(d) Write about cytoskeleton.

(e) write about body symmetry.

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

(a) Chemical nature of enzymes

(b) Nucleus

(c) Significance of meiosis

(d) Reflex action

6. Describe the digestive system of human with diagram. 4+1=5

Or

What is respiration? Describe the different types of respiration. 1+4=5

7. What is chemical coordination? What are the hormones secreted by thyroid gland? Mention their functions. 1+2+2=5

-00000-

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AHSEC H.S Class 11 Biology Previous Year Question Paper 

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