Identify the components labelled as A, B, C, D and E in the diagram given below from the list (i) to (viii).
Cristae of mitochondria
Inner membrane of mitochondria
Smooth endoplasmic reticulum
Rough endoplasmic reticulum
A. A - (viii), B - (v), C - (vii), D - (iii), E - (iv)
B. A - (i), B - (iv), C - (vii), D - (vi), E - (iii)
C. A - (vi), B - (v), C - (iv), D - (vii), E - (i)
D. A - (v), B - (i), C - (iii), D - (ii), E - (iv)
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Correct Answer : A.
In the given diagram of endoplasmic reticulum, the components marked as A, B, C, D and E are respectively nucleus (viii), rough endoplasmic reticulum (v), ribosomes (vii), cytoplasm (iii) and smooth endoplasmic reticulum (iv). Endoplasmic reticulum is a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis.