Class 8 Cell Structure And Functions CBSE Questions & Answers

Class 8 · Cell Structure And Functions

This is Science Class 8 Cell Structure and Functions CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Extra chromosomal DNA is found in prokaryotic cells is called:
  • A
    plasmid
    Correct
  • B
    transmid
  • C
    resistance
  • D
    helix
2
Muscles have the ability to :
  • A
    keep dust and cold away
  • B
    protect us from microbes
  • C
    carry oxygen in plasma
  • D
    contract and relax
    Correct
3
Studying minute details of cell became possible due to :
  • A
    discovery of protoplasm
  • B
    discovery of electron microscope
    Correct
  • C
    research work in biotechnology
  • D
    discovery of genetic material
4
Cells that cannot reproduce is/are :
  • A
    both RBC & nerve cell
    Correct
  • B
    nerve cell
  • C
    WBC
  • D
    RBC
5
Match the following :i) Nerve…………....a) false feetii) Bacteria…………b) largest celliii) Ostrich egg…….c) branched celliv) Pseudopodia…..d) blood cellv) Erythrocyte……..e) cell wall
  • A
    i.c,ii.e,iii.b, iv.a, v.d
    Correct
  • B
    i.b,ii.d,iii.e, iv.c, v.a
  • C
    i.c,ii.e,iii.d, iv.a, v.b
  • D
    i.d,ii.a,iii.b, iv.e, v.c
6
Amisha observed a slide and saw a pair of guard cells in it. She is observing slide of :
  • A
    animal
  • B
    bacteria
  • C
    virus
  • D
    plant
    Correct
7
Read the following statements :i) Plasma membrane is non flexible.ii) Plasma membrane creates channels or pores for movement of substances.
  • A
    both are correct
  • B
    statement ii) is correct but i) is wrong
    Correct
  • C
    statement i) is correct but ii) is wrong
  • D
    both are wrong
8
Ribosomes are not found in :
  • A
    WBC
  • B
    amoeba
  • C
    blue green algae
  • D
    TMV
    Correct
9
Materials can move across cell membrane by :
  • A
    all of these
    Correct
  • B
    diffusion
  • C
    active transport
  • D
    passive transport
10
Read the following statements :i) chromosomes are found in eukaryotic nucleus.ii) all chromosomes are of same length and shape.
  • A
    statement ii) is correct but i) is wrong
  • B
    both are correct
  • C
    statement i) is correct but ii) is wrong
    Correct
  • D
    both are wrong
11
The smallest possible cell is :
  • A
    RBC
  • B
    PPLO
    Correct
  • C
    TMV
  • D
    HIV
12
Read the following statements :i) cytoplasm is involved in synthesis of useful materials.ii) cytoplasm recycles unwanted materials for the cell.
  • A
    both are wrong
  • B
    statement ii) is correct but i) is wrong
  • C
    statement i) is correct but ii) is wrong
  • D
    both are correct
    Correct
13
Cell organelle better known as protein factory of the cell are:
  • A
    golgi apparatus
  • B
    mitochondria
  • C
    ribosomes
    Correct
  • D
    endoplasmic reticulum
14
Read the following statements :i) A cell cannot live long without a nucleus.ii) Red blood cell of human body lack a nucleus.
  • A
    both are correct
    Correct
  • B
    statement i) is correct but ii) is wrong
  • C
    statement ii) is correct but i) is wrong
  • D
    both are wrong
15
Which of the following organism will have a cell wall?
  • A
    mushroom
    Correct
  • B
    euglena
  • C
    dog
  • D
    cat