MCQ
Identify the components labelled as $A$, $B$, $C$, $D$ and $E$ in the diagram given below from the list  $(i)$ to $(viii)$.

$(i)$ Cristae of mitochondria      $(ii)$ Inner membrane of mitochondria      $(iii)$ Cytoplasm      $(iv)$ Smooth endoplasmic reticulum     $(v)$ Rough endoplasmic reticulum   $(vi)$ Mitochondrial matrix     $(vii)$ Ribosome   $(viii)$ Nucleus

  • $(viii)\; (v)\; (vii)\; (iii)\; (iv)$
  • B
    $(i)\; (iv)\; (vii)\; (vi)\; (iii)$
  • C
    $(vi)\; (v)\; (iv)\; (vii)\; (i)$
  • D
    $(v)\; (i)\; (iii)\; (ii)\; (iv)$

Answer

Correct option: A.
$(viii)\; (v)\; (vii)\; (iii)\; (iv)$
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.

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