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Question 559
Biochemistry → General
Classification
Question
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Which group consists entirely of enzymes specifically identified within lysosomes?
Question Stem
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Options
A
Proteases, lipases, amylases and nucleases
B
Tubulin, actin, myosin and desmin
C
Acetyl-CoA synthetase, tubulin, protease and histone
D
Proteases, histones, keratin and nucleases
E
Lipases, vimentin, actin and amylases
Explanation
Lysosomes contain proteolytic enzymes, particularly acid hydrolases, that digest unwanted endogenous and phagocytosed exogenous material. Important lysosomal enzymes listed include proteases, lipases, amylases and nucleases.
Option Validity
B) These are cytoskeletal proteins rather than the listed lysosomal digestive enzymes.
C) Tubulin and histones are not included among the listed lysosomal enzymes.
D) Histones and keratin are structural proteins rather than the listed lysosomal enzymes.
E) Vimentin and actin are cytoskeletal proteins.
Further Reading
Saxena R. Textbook for MRCOG-1: Basic Sciences in Obstetrics & Gynaecology. Chapter 4 — Lysosomes. Printed page 126.