Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with – [Figure] 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) (v), (B) (iv), (C) (viii), (D) (iii)
- (A) (i), (B) (iv), (C) (viii), (D) (vi)
- (A) (v), (B) (i), (C) (iii), (D) (ii)
- (A) (vi), (B) (v), (C) (iv), (D) (vii)
Answer
(1) (A) (v), (B) (iv), (C) (viii), (D) (iii)
Solution
The diagram shows a part of the nucleus with the endoplasmic reticulum continuous with its outer membrane.
A: flattened sacs studded with ribosomes (dots) ⇒ rough endoplasmic reticulum (v).
B: tubules without ribosomes ⇒ smooth endoplasmic reticulum (iv).
C: large body bounded by the nuclear envelope ⇒ nucleus (viii).
D: the fluid around the membranes ⇒ cytoplasm (iii).
As per NCERT, the ER bearing ribosomes on its surface is rough ER and the ER without ribosomes is smooth ER; the outer membrane of the nuclear envelope is continuous with the ER.
∴ (A) (v), (B) (iv), (C) (viii), (D) (iii).
Answer: (1)