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Question 528
Biochemistry → General
Classification
Question
SSBAQuestion Header
Which description correctly distinguishes ectoplasm from endoplasm within the cytoplasm?
Question Stem
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Options
A
Ectoplasm is nuclear while endoplasm is mitochondrial
B
Ectoplasm is confined to membrane-bound organelles while endoplasm contains only water
C
Ectoplasm is peripheral cytoplasm while endoplasm is the more internally situated cytoplasm
D
Ectoplasm forms the nuclear membrane while endoplasm forms the cell membrane
E
Ectoplasm contains DNA while endoplasm contains RNA
Explanation
The cytoplasm contains approximately 80% water together with proteins and lipids. Its peripheral region is termed ectoplasm, whereas the more internally situated region is termed endoplasm.
Option Validity
A) Ectoplasm and endoplasm are regions of cytoplasm, not nuclear and mitochondrial compartments.
B) Ectoplasm is not defined by confinement to membrane-bound organelles, and endoplasm does not contain only water.
D) These terms describe cytoplasmic regions rather than the nuclear and cell membranes.
E) Ectoplasm and endoplasm are not distinguished by exclusive DNA or RNA content.
Further Reading
Richa Saxena. Textbook for MRCOG-1: Basic Sciences in Obstetrics & Gynaecology. Biochemistry and Nutrition — Biochemistry — Cytoplasm. Printed page 124.