The mouse facility sends you the wrong knockout mice. For fun, you check levels of cholesterol and cholesterol precursors in the mice and find that the mice you mistakenly received have very low levels of cholesterol (similar to the case of dhcr7 (-/-) mice). These mice however have elevated levels of squalene in their serum and tissues. The enzymes in the pathway have been numbered for your convenience in the schematic below. Which enzyme number (enzyme 1-5) do you think is mutated in the knockout mouse you received? In one brief sentence, explain why you chose that enzyme. Geranyl-PP Enzyme 1 - Farnesyl-PP Enzyme 2 Squalene Enzyme 3 Lanosterol Enzyme 4 7-Dehydrocholesterol Enzyme 5 Cholesterol

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Answer the practice questions
The mouse facility sends you the wrong
knockout mice. For fun, you check levels of
cholesterol and cholesterol precursors in the
mice and find that the mice you mistakenly
received have very low levels of cholesterol
(similar to the case of dhcr7 (-/-) mice).
These mice however have elevated levels of
squalene in their serum and tissues. The
enzymes in the pathway have been
numbered for your convenience in the
schematic below. Which enzyme number
(enzyme 1-5) do you think is mutated in the
knockout mouse you received? In one brief
sentence, explain why you chose that
enzyme.
Geranyl-PP
Enzyme 1 -
Farnesyl-PP
Enzyme 2
Squalene
Enzyme 3
Lanosterol
Enzyme 4
7-Dehydrocholesterol
Enzyme 5 -
Cholesterol
Transcribed Image Text:The mouse facility sends you the wrong knockout mice. For fun, you check levels of cholesterol and cholesterol precursors in the mice and find that the mice you mistakenly received have very low levels of cholesterol (similar to the case of dhcr7 (-/-) mice). These mice however have elevated levels of squalene in their serum and tissues. The enzymes in the pathway have been numbered for your convenience in the schematic below. Which enzyme number (enzyme 1-5) do you think is mutated in the knockout mouse you received? In one brief sentence, explain why you chose that enzyme. Geranyl-PP Enzyme 1 - Farnesyl-PP Enzyme 2 Squalene Enzyme 3 Lanosterol Enzyme 4 7-Dehydrocholesterol Enzyme 5 - Cholesterol
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