Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with:

  
 

Components :
(i) Cristae of mitochondria
(ii) Inner membrane of mitochondria
(iii) Cytoplasm
(iv) Smooth endoplasmic reticulum
(v) Rough endoplasmic reticulum
(vi) Mitochondrial matrix
(vii) Cell vacuole
(viii) Nucleus

The correct components are:
 

A B C D
1. (i) (iv) (viii) (vi)
2. (vi) (v) (iv) (vii)
3. (v) (i) (iii) (ii)
4. (v) (iv) (viii) (iii)

Subtopic:  Endomembrane System (Endoplasmic Reticulum) |
 85%
From NCERT
AIPMT - 2010
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Which one of the following is not considered as a part of the endomembrane system?
1. Lysosome
2. Golgi complex
3. Peroxisome
4. Vacuole

Subtopic:  Endomembrane System |
 93%
From NCERT
AIPMT - 2011
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The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), (C) and (D). Select the part correctly matched with its function.

     
 

1. Part (A) : Matrix – a major site for respiratory chain enzymes
2. Part (D) : Outer membrane – gives rise to the inner membrane by splitting
3. Part (B) : Inner membrane – forms infoldings called cristae
4. Part (C) : Cristae – possess single circular DNA molecule and ribosome
Subtopic:  Mitochondria |
 72%
From NCERT
AIPMT - 2011
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An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called:
1. Endoplasmic Reticulum
2. Plasmalemma
3. Cytoskeleton
4. Thylakoid

Subtopic:  Cytoskeleton |
 89%
From NCERT
AIPMT - 2010
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Which one of the following cellular parts is correctly described?

1. Centrioles - sites for active RNA synthesis
2. Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)
3. Lysosomes - optimally active at a pH of about 8.5
4. Thylakoids - flattened membranous sacs forming the grana of chloroplasts
Subtopic:  Plastids |
 88%
From NCERT
AIPMT - 2012
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The cell membranes are mainly composed of:

1. Phospholipids

2. Proteins

3. Fats

4. Carbohydrates

Subtopic:  Cell Membrane |
 82%
From NCERT
AIPMT - 2005
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According to the widely accepted "fluid mosaic model", cell membranes are semi-fluid, where lipids and integral proteins can diffuse randomly. In recent years, this model has been modified in several respects. In this regard, which of the following statements is incorrect:
 

1. Proteins can also undergo flip-flop movements in the lipid bilayer
2. Many proteins remain completely embedded within the lipid bilayer
3. Proteins in cell membranes can travel within the lipid bilayer
4. Proteins can remain confined within certain domains of the membrane

Subtopic:  Evidence for Fluidic Nature of Membrane |
 52%
From NCERT
AIPMT - 2005
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The main organelle involved in the modification and routing of newly synthesized proteins to their destinations is -

1. Endoplasmic Reticulum

2. Lysosome

3. Mitochondria

4. Chloroplast 

Subtopic:  Endomembrane System (Endoplasmic Reticulum) |
 87%
From NCERT
AIPMT - 2005
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Chlorophyll in chloroplasts is located in:

1. Grana

2. Pyrenoid

3. Stroma

4. Both (1) and (3)

Subtopic:  Plastids |
 61%
From NCERT
AIPMT - 2005
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Role of microtubules is:
1.  To help in cell division
2.  Cell membrane formation
3.  Respiration
4.  Pinocytosis

Subtopic:  Cilia & Flagella |
 73%
From NCERT
AIPMT - 1998
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