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Question 554
Biochemistry → General
Classification
Question
SSBAQuestion Header
Which pairing correctly contrasts two exceptions to the usual single-nucleus organisation of human cells?
Question Stem
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Options
A
Erythrocyte — absent nucleus; skeletal muscle cell — multiple nuclei
B
Erythrocyte — multiple nuclei; skeletal muscle cell — absent nucleus
C
Erythrocyte — single nucleus; skeletal muscle cell — single nucleus
D
Erythrocyte — double nucleus; skeletal muscle cell — single nucleus
E
Erythrocyte — nucleolus only; skeletal muscle cell — absent nucleus
Explanation
The nucleus is absent from mature erythrocytes, whereas skeletal muscle cells are multinucleated.
Option Validity
B) The relationship is reversed: erythrocytes lack nuclei and skeletal muscle cells are multinucleated.
C) Neither cell type follows the stated single-nucleus pattern.
D) Erythrocytes do not contain two nuclei and skeletal muscle cells are not typically single-nucleated.
E) Mature erythrocytes do not retain a nucleolus, while skeletal muscle cells contain multiple nuclei.
Further Reading
Saxena - MRCOG-1 Basic Sciences - Biochemistry, printed p.127.