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Question 527
Biochemistry → General
Classification
Question
SSBAQuestion Header
Which function of the cell membrane is most directly responsible for maintaining a distinct intracellular electrolyte and biochemical environment?
Question Stem
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Options
A
Formation of lysosomal hydrolytic enzymes
B
Control of transmembrane movement by active transport
C
Synthesis of mitochondrial ATP
D
Assembly of ribosomal subunits
E
Formation of the mitotic spindle
Explanation
The cell membrane separates intracellular fluid from extracellular fluid and helps maintain the intracellular electrolyte and biochemical environment by controlling movement across the membrane, including active transport.
Option Validity
A) Lysosomal enzymes are not formed by the cell membrane.
C) ATP synthesis by oxidative phosphorylation occurs in mitochondria.
D) Ribosomal subunits are associated with nuclear activity rather than the cell membrane.
E) The mitotic spindle is associated with centrioles and microtubules.
Further Reading
Richa Saxena. Textbook for MRCOG-1: Basic Sciences in Obstetrics & Gynaecology. Biochemistry and Nutrition — Biochemistry — Cell membrane. Printed page 124.