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Cell: The Unit of Life · Question 63

AIPMT 2015MCQEasy📈 Topic in 38% papers+4−1
1

Which of the following are not membrane-bound ?

  1. Ribosomes
  2. Mesosomes
  3. Lysosomes
  4. Vacuoles

Answer

(1) Ribosomes

Solution

As per NCERT, ribosomes are non-membrane bound organelles found in all cells; they are made of RNA and proteins.

⇒ Lysosomes and vacuoles are bounded by a membrane (the vacuolar membrane is the tonoplast).

⇒ Mesosomes are formed by infoldings of the plasma membrane, so they are made of membrane.

∴ Ribosomes are not membrane-bound.

Answer: (1)

AIPMT 2015

Keep practising — Cell: The Unit of Life

2

DNA is not present in :

  1. Nucleus
  2. Chloroplast
  3. Mitochondria
  4. Ribosomes
AIPMT 2015 (Cancelled)
3

Nuclear envelope is a derivative of :

  1. Membrane of Golgi complex
  2. Smooth endoplasmic reticulum
  3. Rough endoplasmic reticulum
  4. Microtubules
AIPMT 2015 (Cancelled)
4

The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are

  1. Stroma lamellae
  2. Cristae
  3. Stroma
  4. Grana
AIPMT 2015 (Cancelled)
5

Select the correct matching in the following pairs :

  1. Rough ER – Oxidation of fatty acids
  2. Smooth ER – Oxidation of phospholipids
  3. Rough ER – Synthesis of glycogen
  4. Smooth ER – Synthesis of lipids
AIPMT 2015 (Cancelled)
6

The chromosomes in which centromere is situated close to one end are :

  1. Telocentric
  2. Metacentric
  3. Sub-metacentric
  4. Acrocentric
AIPMT 2015 (Cancelled)
7

Which one of the following is not an inclusion body found in prokaryotes?

  1. Cyanophycean granule
  2. Phosphate granule
  3. Polysome
  4. Glycogen granule
AIPMT 2015 (Cancelled)
8

Which structures perform the function of mitochondria in bacteria?

  1. Nucleoid
  2. Ribosomes
  3. Cell wall
  4. Mesosomes
AIPMT 2014
9

The motile bacteria are able to move by

  1. fimbriae
  2. flagella
  3. cilia
  4. pili.
AIPMT 2014
10

The solid linear cytoskeletal elements having a diameter of 6 nm and made up of a single type of monomer are known as:

  1. Microfilaments
  2. Lamins
  3. Microtubules
  4. Intermediate filaments
AIPMT 2014
11

The osmotic expansion of a cell kept in water is chiefly regulated by:

  1. Vacuoles
  2. Plastids
  3. Mitochondria
  4. Ribosomes
AIPMT 2014

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