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Question 551
Biochemistry → General
Classification
Question
SSBAQuestion Header
Which combination most accurately characterises a lysosome?
Question Stem
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Options
A
No limiting membrane with RNA-rich subunits
B
Membrane-bound organelle containing acid hydrolases
C
Double membrane containing a respiratory chain on cristae
D
Hollow cylinder composed of tubulin
E
Membrane-bound organelle containing chromosomal DNA and histones
Explanation
Lysosomes are membrane-bound organelles containing acid hydrolases, including proteases, lipases, amylases and nucleases.
Option Validity
A) Ribosomes lack a limiting membrane and contain RNA and protein.
C) A double membrane and respiratory chain on cristae characterise mitochondria.
D) Hollow tubulin-containing cylinders describe centrioles.
E) Chromosomal DNA and histones form nuclear chromatin rather than lysosomal contents.
Further Reading
Saxena - MRCOG-1 Basic Sciences - Biochemistry, printed p.126.