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Cell: The Unit of Life · Question 123

AIPMT 2001MCQEasy📈 Topic in 50% papers+4−1
1

Difference in gram positive and gram negative bacteria is due to

  1. cell wall
  2. cell membrane
  3. ribosome
  4. cytoplasm

Answer

(1) cell wall

Solution

As per NCERT, based on the differences in the cell envelopes and the manner in which they respond to the staining procedure developed by Gram, bacteria are classified as Gram positive (take up the gram stain) and Gram negative (do not).

Gram positive bacteria have a thick peptidoglycan cell wall, whereas Gram negative bacteria have a thin peptidoglycan layer with an outer membrane.

∴ The difference is due to the cell wall.

Answer: (1)

AIPMT 2001

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2

Element necessary for the middle lamella is

  1. K
  2. Cu
  3. Ca
  4. Zn
AIPMT 2001
3

Microtubules are absent in:

  1. Spindle fibres
  2. Mitochondria
  3. Centriole
  4. Flagella
AIPMT 2001
4

Spindle fibres unite with which structure of chromosomes?

  1. Chromocentre
  2. Chromomere
  3. Kinetochore
  4. Centriole
AIPMT 2000
5

Lysosome contains:

  1. Reductive enzymes
  2. Oxidative enzymes
  3. Anabolic enzymes
  4. Hydrolytic enzymes
AIPMT 2000
6

Which of the following ribosomes are engaged in protein synthesis in animal cell?

  1. Ribosomes of only nucleolus and cytosol
  2. Ribosomes which occur on nuclear membrane and E.R.
  3. Ribosomes of only mitochondria and cytosol
  4. Ribosomes of only cytosol
AIPMT 2000
7

Function of telomeres in nucleus is

  1. To seal the ends of chromosome
  2. Poleward movement
  3. To recognize the homologous chromosome
  4. To initiate the RNA synthesis
AIPMT 2000
8

Which cell organelle is concerned with glycosylation of protein?

  1. Endoplasmic reticulum
  2. Ribosome
  3. Mitochondria
  4. Peroxisome
AIPMT 2000

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