Two eukaryotic genes (A and B) are involved in two different metabolic pathways, and each has a control element sequence (enhancer) upstream of their coding sequence. The interaction of these enhancers with specific transcription factors determines the level of gene expression. Gene A Gene B Tissue 1 OFF ON Tissue 2 ON OFF These two genes are expressed differentially in two different tissues (tissue 1 and tissue 2) according to the table below. What can explain this pattern of gene expression? a) Gene A and B have the same control element sequences and the cells of tissue 1 and tissue 2 express the same transcription factors (at the same concentration and at the same time). b) Gene A and gene B belong to the same operon. c) Gene A and B have different control element sequences and the cells of tissue 1 and tissue 2 express the same transcription factors (at the same concentration and at the same time). d) Gene A and B have the same control element sequences and the cells of tissue 1 and tissue 2 express different transcription factors. e) Gene A and B have different control element sequences and the cells of tissue 1 and tissue 2 express different transcription factors.
Two eukaryotic genes (A and B) are involved in two different metabolic pathways, and each has a control element sequence (enhancer) upstream of their coding sequence. The interaction of these enhancers with specific transcription factors determines the level of gene expression. Gene A Gene B Tissue 1 OFF ON Tissue 2 ON OFF These two genes are expressed differentially in two different tissues (tissue 1 and tissue 2) according to the table below. What can explain this pattern of gene expression? a) Gene A and B have the same control element sequences and the cells of tissue 1 and tissue 2 express the same transcription factors (at the same concentration and at the same time). b) Gene A and gene B belong to the same operon. c) Gene A and B have different control element sequences and the cells of tissue 1 and tissue 2 express the same transcription factors (at the same concentration and at the same time). d) Gene A and B have the same control element sequences and the cells of tissue 1 and tissue 2 express different transcription factors. e) Gene A and B have different control element sequences and the cells of tissue 1 and tissue 2 express different transcription factors.
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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Transcribed Image Text:Two eukaryotic genes (A and B) are involved in two different metabolic pathways,
and each has a control element sequence (enhancer) upstream of their coding
sequence. The interaction of these enhancers with specific transcription factors
determines the level of gene expression.
Gene A
Gene B
Tissue 1
OFF
ON
Tissue 2
ON
OFF
These two genes are expressed differentially in two different tissues (tissue 1 and
tissue 2) according to the table below.
What can explain this pattern of gene expression?
a) Gene A and B have the same control element sequences and the cells of
tissue 1 and tissue 2 express the same transcription factors (at the same
concentration and at the same time).
b) Gene A and gene B belong to the same operon.
c) Gene A and B have different control element sequences and the cells of tissue
1 and tissue 2 express the same transcription factors (at the same
concentration and at the same time).
d) Gene A and B have the same control element sequences and the cells of
tissue 1 and tissue 2 express different transcription factors.
e) Gene A and B have different control element sequences and the cells of tissue
1 and tissue 2 express different transcription factors.
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