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Question 538
Biochemistry → General
Classification
Question
SSBAQuestion Header
A cell has abundant endoplasmic reticulum studded with ribosomes. Which function is most directly associated with this organelle?
Question Stem
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Options
A
Protein synthesis
B
Steroid synthesis
C
Hydrogen peroxide detoxification
D
Chromosome movement
E
ATP production by oxidative phosphorylation
Explanation
Rough endoplasmic reticulum bears ribosomes and is associated with protein synthesis. Smooth endoplasmic reticulum is associated with lipid and steroid synthesis, calcium handling and detoxification.
Option Validity
B) Steroid synthesis is associated with smooth rather than rough endoplasmic reticulum.
C) Hydrogen peroxide detoxification is a peroxisomal function.
D) Chromosome movement is associated with the centrosome and spindle apparatus.
E) Oxidative phosphorylation occurs in mitochondria.
Further Reading
Saxena - MRCOG-1 Basic Sciences - Biochemistry, printed p.125.