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Cell: The Unit of Life · Question 121

AIPMT 2002MCQEasy📈 Topic in 50% papers+4−1
1

Ribosomes are produced in:

  1. Mitochondria
  2. Golgi body
  3. Nucleolus
  4. Cytoplasm

Answer

(3) Nucleolus

Solution

As per NCERT, the nucleoli are sites for active ribosomal RNA synthesis.

⇒ In the nucleolus, rRNA is synthesised and assembled with ribosomal proteins into the ribosomal subunits.

∴ Ribosomes are produced in the nucleolus; the subunits then pass to the cytoplasm through nuclear pores.

Answer: (3)

AIPMT 2002

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2

In fluid mosaic model of plasma membrane

  1. Phospholipids form a bimolecular layer in middle part
  2. Upper layer is non-polar and hydrophilic
  3. Proteins form a middle layer
  4. Polar layer is hydrophobic
AIPMT 2002
3

Difference in gram positive and gram negative bacteria is due to

  1. cell wall
  2. cell membrane
  3. ribosome
  4. cytoplasm
AIPMT 2001
4

Element necessary for the middle lamella is

  1. K
  2. Cu
  3. Ca
  4. Zn
AIPMT 2001
5

Microtubules are absent in:

  1. Spindle fibres
  2. Mitochondria
  3. Centriole
  4. Flagella
AIPMT 2001
6

Spindle fibres unite with which structure of chromosomes?

  1. Chromocentre
  2. Chromomere
  3. Kinetochore
  4. Centriole
AIPMT 2000
7

Lysosome contains:

  1. Reductive enzymes
  2. Oxidative enzymes
  3. Anabolic enzymes
  4. Hydrolytic enzymes
AIPMT 2000
8

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
9

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
10

Which cell organelle is concerned with glycosylation of protein?

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

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