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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:
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
A – (v), B – (iv), C – (viii), D – (iii)
B
A – (i), B – (iv), C – (viii), D – (vi)
C
A – (vi), B – (v), C – (iv), D – (vii)
D
A – (v), B – (i), C – (iii), D – (ii)
Detailed Solution
The diagram is the NCERT figure of the endoplasmic reticulum lying next to the nucleus.
A is the part of the reticulum whose flattened cisternae are studded with ribosomes on the outer surface: rough endoplasmic reticulum (v). It is continuous with the outer membrane of the nucleus and is the site of protein synthesis.
B is the tubular part of the reticulum without ribosomes: smooth endoplasmic reticulum (iv), the major site of lipid synthesis.
C is the large rounded body enclosed by the nuclear envelope with pores: the nucleus (viii).
D is the region lying outside these membranes: the cytoplasm (iii).
Hence A – (v), B – (iv), C – (viii), D – (iii).
A is the part of the reticulum whose flattened cisternae are studded with ribosomes on the outer surface: rough endoplasmic reticulum (v). It is continuous with the outer membrane of the nucleus and is the site of protein synthesis.
B is the tubular part of the reticulum without ribosomes: smooth endoplasmic reticulum (iv), the major site of lipid synthesis.
C is the large rounded body enclosed by the nuclear envelope with pores: the nucleus (viii).
D is the region lying outside these membranes: the cytoplasm (iii).
Hence A – (v), B – (iv), C – (viii), D – (iii).