EBK BIOLOGY: CONCEPTS AND APPLICATIONS
10th Edition
ISBN: 8220103600774
Author: STARR
Publisher: CENGAGE L
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Chapter 29, Problem 2SA
Summary Introduction
Introduction:
Membrane potential is the voltage across a neuron membrane. During an action potential, there is an abrupt reversal in the charge gradient across the plasma membrane of a neuron. This occurs due to the movement of sodium and potassium ions through the voltage-gated ion channels.
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19. On the diagram below
a. Label the three pictures as: DNA; polypeptide; or RNA.
b. Label the arrows as: translation or transcription/RNA processing.
c. Add the following details to the diagram.
Promoter region
TATA box
Transcription start site
Transcription terminator
Intron (A,B,C,D)
Exons (1,2,3,4,5)
Splice sites
5' cap
5' UTR (untranslated region)
3' poly A tail
3' UTR (untranslated region)
Translational start (AUG)
Translational stop (UGA, UAG, or UAA)
N and C ends of polypeptide
0000
Match the letter labels in the figure below to the terms. Some letter
labels are not used.
MNNNNNNIN
M
C
B
A
M
D
F
E
H
K
G
8
The diagram below illustrates a quorum sensing pathway from Staphylococcus aureus. Please answer the following questions.
1. Autoinduction is part of the quorum sensing system. Which promoter (P2 or P3) is critical for autoinduction?
2)This staphylococcus aureus grows on human wounds, causing severe infections. You would like to start a clinical trial to treat these wound infections. Please describe:
a) What molecule do you recommend for the trial. Why?
b) Your trial requires that Staphylococcus aureus be isolated from the wound and submitted to genome sequencing before admittance. Why? What are you testing for?
3) If a mutation arises where the Promoter P3 is constitutively active, how would that influence sensitivity to AIP? Please explain your rationale.
4) This pathway is sensitive to bacterial cell density. Describe two separate mutation that would render the pathway active independent of cell density. Briefly explain your rationale.
Mutation 1
Mutation 2
Chapter 29 Solutions
EBK BIOLOGY: CONCEPTS AND APPLICATIONS
Ch. 29 - ______ relay messages from the brain and spinal...Ch. 29 - Prob. 2SACh. 29 - Action potentials occur when ______. a. potassium...Ch. 29 - Neurotransmitters are released by _______. a. axon...Ch. 29 - Prob. 5SACh. 29 - Prob. 6SACh. 29 - Prob. 7SACh. 29 - Prob. 8SACh. 29 - Prob. 9SACh. 29 - Prob. 10SA
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