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:QUESTION 4:
In the following partial diploid, predict if beta-galactosidase will be expressed
in absence or presence of lactose. Select all that apply
Glucose is absent from the medium and where
| = lacl (lac repressor), P = promoter, O = operator, and Z = lacZ (beta-galactosidase
gene).
Repressor can act bind to operator in both genes, but the operator controls only genes
adjacent to it.
OC is a operator mutation, which does not allow repressor to bind.
(+) indicates wild type or normal protein, and (-) indicates nonfunctional or mutated protein
%3D
%3D
%3D
Promoter
CAMP
CRP or CAP
CAP
CAP site
Operator lacZ lacY lacA
F' I+P+ OCZ-
I-P+ O+ Z*
RNA Polymerase
A. Yes, beta-galactosidase will be expressed in absence of lactose
B. No, beta-galactosidase will not be expressed in absence of lactose
C. Yes, beta-galactosidase will be expressed in presence of lactose
D. No, beta-galactosidase will not be expressed in presence of lactose
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