On account of the disruption in education due to the corona pandemic, we're opening up our platform for teachers, free of cost. Know More →

Class 8

Explore popular questions from Cell Structure and Functions for Class 8. This collection covers Cell Structure and Functions previous year Class 8 questions hand picked by experienced teachers.

Cell Structure and Functions

Correct Marks 4

Incorrectly Marks -1

Q 1. Clochicine interferes with

A

Chromosome replication

Organisation of spindle

C

Chromosome condensation

D

Incorporation of nitrogen bases

Explanation

Alkaloid colchicine (produced by many plants of family Liliaceae) inhibits the microtubules to assemble to form spindle fibres. Therefore, alkaloid colchicine interferes with mitosis and chromosome segregation and the cell division is arrested at metaphase in presence of colchicine. So, the correct answer is 'Organisation of spindle'.

Correct Marks 1

Incorrectly Marks 0

Q 2. Double membrane is absent in –

A

Mitochondrion

B

Chloroplast

C

Nucleus

Lysosome

Correct Marks 1

Incorrectly Marks 0

Q 3. Animal cell is limited by

Plasma membrane

B

Shell membrane

C

Cell wall

D

Basement membrane

Correct Marks 1

Incorrectly Marks 0

Q 4. The radiant energy of sunlight is converted to chemical energy and stored as

A

AMP

B

ADP

ATP

D

APP

Correct Marks 1

Incorrectly Marks 0

Q 5. Root hair absorbs water from soil through –

Osmosis

B

Active transport

C

Diffusion

D

Endocytosis

Correct Marks 1

Incorrectly Marks 0

Q 6. The barrier between the protoplasm and outer environment in a plant cell is –

A

Cell membrane

B

Nuclear membrane

Cell wall

D

Tonoplast

Correct Marks 1

Incorrectly Marks 0

Q 7. An animal cell differs from a plant cell in respect of –

A

ER

Cell wall

C

Ribosomes

D

Cell membrane.

Correct Marks 1

Incorrectly Marks 0

Q 8. If the nucleus is a cell's "control centre" and chloroplasts its "solar collectors". Which of the following might be called the cell's combination "food processor" and "garbage disposer"?

Lysosome

B

Ribosome

C

Golgi apparatus

D

Nucleolus

Correct Marks 1

Incorrectly Marks 0

Q 9. The longest cell in human body is –

Neuron

B

Muscle fibre

C

Epithelial cell

D

Bone cell

Correct Marks 1

Incorrectly Marks 0

Q 10. Identify human cells which lack nucleus–

A

WBC

RBC

C

Platelets

D

Nerve cells

Correct Marks 1

Incorrectly Marks 0

Q 11. The energy currency of a cell is

A

ADP

B

AMP

ATP

D

CTP

Correct Marks 1

Incorrectly Marks 0

Q 12. Which organelle releases oxygen?

A

Ribosome

B

Golgi apparatus

C

Mitochondria

Chloroplast.

Correct Marks 1

Incorrectly Marks 0

Q 13. The term "protoplasm" to the living substance present inside the cell, was given by

A

Robert Hooke

B

Robert Brown

J.E. Purkinje

D

W.Flemming

Correct Marks 1

Incorrectly Marks 0

Q 14. Ribosomes are the centre for –

A

Respiration

B

Photosynthesis

Protein synthesis

D

Fat synthesis.

Correct Marks 1

Incorrectly Marks 0

Q 15. Lysosomes are the reservoirs of

A

Fat

B

RNA

C

Secretory glycoproteins

Hydrolytic enzymes.

Correct Marks 1

Incorrectly Marks 0

Q 16. The membrane surrounding the vacuole of a plant cell is called

Tonoplast

B

Plasma membrane

C

Nuclear membrane

D

Cell wall

Correct Marks 1

Incorrectly Marks 0

Q 17. Centriole is associated with –

A

DNA synthesis

B

Reproduction

Spindle formation

D

Respiration

Correct Marks 1

Incorrectly Marks 0

Q 18. The cell organelle associated with cell secretion is

A

Plastids

B

Mitochondria

Golgi apparatus

D

Nucleolus

Correct Marks 1

Incorrectly Marks 0

Q 19. Which of the following is an inclusion?

A

Mitochondrion

B

Lysosome

C

Golgi complex

Starch grain

Correct Marks 1

Incorrectly Marks 0

Q 20. Which of the following would not be considered part of a cell's cytoplsm?

A

Ribosome

Nucleus

C

Mitochondrion

D

Microtubule

Correct Marks 1

Incorrectly Marks 0

Q 21. Which of the following is called the brain of the cell?

Nucleus

B

Mitochondria

C

Ribosomes

D

Plasma membrane

Correct Marks 1

Incorrectly Marks 0

Q 22. Which one is not a part of nucleus?

A

Chromatin

B

Nucleolus

Centrosome

D

Nucleoplasm

Correct Marks 1

Incorrectly Marks 0

Q 23. The common feature amongst nucleus, chloroplast and mitochondrion is

DNA

B

Lamellae

C

Cristae

D

All of these

Correct Marks 1

Incorrectly Marks 0

Q 24. Nucleus is separated from surrounding cytoplasm by a nuclear envelope which is

A

Single and porous

Double and porous

C

Single and nonporous

D

Double and nonporous

Correct Marks 1

Incorrectly Marks 0

Q 25. Nucleoplasm is continuous with cytoplasm through

A

Centriole

B

Golgi apparatus

Nuclear pores

D

Endoplasmic reticulum