9 FA 1 EM KEY 2025-26

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 Self Assessment Model Paper 1 (2025-26)

Class : 9    Subject: Biological Science
No. of Questions: 20    Total Marks: 35    Duration: 1 hr. 15 min.

SECTION – A

Multiple Choice Questions (15 × 1 = 15)

1. Observe the given diagram.


If it represents a plant cell, which of the following best describes it?

A) 1- Cell wall, 2 - Plasma membrane, 3 - Nucleus, 4- Chromosome

B) 1- Cell wall, 2 - Nucleus, 3 - Plasma membrane, 4- Chromosome

C) 1- Plasma membrane, 2 - Cell wall, 3- Chromosome, 4- Nucleus

D) 1- Plasma membrane, 2- Cell wall, 3- Nucleus, 4- Chromosome

Correct Answer: A

2. The entire body of an organism ‘X’ is made up of a single cell with a well-organized nucleus. What conclusion can be drawn?

A) It is a unicellular prokaryote

B) It is a unicellular eukaryote
C) It is an autotrophic prokaryote
D) It is a heterotrophic eukaryote

Correct Answer: B

3. Which organelle enables a plant cell to capture solar energy?

A) Cell wall

B) Vacuole
C) Nucleus
D) Chloroplast

Correct Answer: D

4. Observation of cork slices under microscope resulted in?



A) Discovery of cell
B) Discovery of nucleus
C) Discovery of cell wall
D) Discovery of plasma membrane

Correct Answer: A

5. Which feature makes it a prokaryote?



A) Presence of cell wall
B) Absence of chloroplast
C) Presence of cell membrane
D) Absence of an organised nucleus

Correct Answer: D

6. Animals classified into two groups (Amoeba, Paramoecium, Yeast / Frog, Hydra, Dog). On what basis?



A) Number of cells
B) Presence of nucleus
C) Type of genetic material
D) Habitat

Correct Answer: A

7. Assertion & Reason

A: Organisms are made up of cells and their products.
R: Cell is the basic structural unit.

A) A true, R false
B) A false, R true
C) Both true, R explains A
D) Both true, R does not explain A

Correct Answer: C

8. Complex and extensively branched cell is?

A) White blood cell

B) Red blood cell

C) Muscle cell
D) Nerve cell

Correct Answer: D

9. Meiosis daughter cells chromosome number?



A) Vani
B) Rani
C) Ramesh
D) Suresh

(Vani: Half number)

Correct Answer: A

10. Which cannot be found in human muscle cell?

P- Cytoplasm
Q- Plastids
R- Mitochondria

A) Only P
B) Only Q
C) Only P and Q
D) Only P and R

Correct Answer: B

11. TRUE about plasma membrane?

A) Allows only certain materials
B) Extends from nucleus
C) Outermost layer in all cells
D) Determines functions

Correct Answer: A

12. NOT a function of nucleus?

A) Controls activities
B) Separates cells
C) Helps in new cell production
D) Transfers characters

Correct Answer: B

13. Detoxifying poisons in liver cells?

A) Lysosomes
B) Golgi apparatus
C) Rough ER
D) Smooth ER

Correct Answer: D

14. Empty box-like structures in matchstick slice?

P – Cells are dead
Q – Cells are alive
R – Partitions are cell walls
S – Partitions are membranes

A) P and R
B) P and S
C) Q and R
D) Q and S

Correct Answer: A

15. Observation of onion sizes (X & Y)

Y





Correct statement?

A) Cells in onion X are big
B) Number of cells same
C) Cells in X less than Y
D) No relation between onion size and cell size

Correct Answer: D


SECTION – B

(2 × 2 = 4)

16. Name the scientists associated with the following:

i) Coined the term ‘Protoplasm’

  • J.E. Purkinje

ii) Discovered nucleus

  • Robert Brown

17. What would happen if there is no Golgi apparatus in a cell?

  • Proteins will not be properly packed.

  • Secretion of materials will not occur.

  • Transport inside the cell will be affected.

  • Cell cannot function properly.

SECTION – C     4 MARK QUESTIONS

18. Mention one function of the following:

i) Mitochondria

  • Produces energy (ATP) for the cell.

ii) Leucoplasts

  • Stores food materials like starch and oils.

iii) Lysosomes

  • Digests waste materials.

iv) Rough Endoplasmic Reticulum (RER)

  • Helps in protein synthesis.

19. Draw a neat labelled diagram of an animal cell.




SECTION – D

(8 Marks – Internal Choice)

20 (A) Design an experiment to demonstrate Osmosis.

20 (A) Experiment to demonstrate Osmosis

Aim:

  • To demonstrate osmosis using an egg.

Materials:

  • Egg, vinegar, water, salt solution, beakers.

Procedure:

  • Remove egg shell using vinegar.

  • Place egg in pure water.

  • Place another egg in salt solution.

Observation:

  • Egg in water swells.

  • Egg in salt solution shrinks.

Conclusion:

  • Water moves through a selectively permeable membrane.

  • This process is called osmosis.

OR

20 (B) Differences between Mitosis and Meiosis

Basis

Mitosis

Meiosis

Occurs in

Body cells

Reproductive cells

Daughter cells

2

4

Type

Identical

Different

Importance

Growth & repair

Gamete formation