EBK BIOLOGY
11th Edition
ISBN: 8220101472069
Author: Byers
Publisher: PEARSON
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Chapter 25, Problem 1AC
Summary Introduction
To review:
Classification of hagfishes as vertebrates or invertebrates, the characteristics that decide the classification, whether it is important to place an organism in a group and the rationale behind this classification.
Introduction:
Hagfishes belong to the group Chordata. Chordates are the animals that have specific characteristics, namely a dorsal nerve chord, presence of a notochord, pharyngeal gill and post-anal tail. Based on other characteristics of the species, these animals are further divided into different subgroups.
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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 25 Solutions
EBK BIOLOGY
Ch. 25 - The two groups of mammals with the largest number...Ch. 25 - More than half of all vertebrate species are a....Ch. 25 - 3. Which of the following is not a characteristic...Ch. 25 -
4. Adult frogs and toads obtain oxygen...Ch. 25 -
5. Hagfishes
a. are predators of live...Ch. 25 - In chordates, the nerve cord is ________ and runs...Ch. 25 - Animals that are chordates but not vertebrates...Ch. 25 - Prob. 3FTBCh. 25 - Among tetrapod groups, hair is found in; the skin...Ch. 25 - The only mammals that lay eggs are. The only...
Ch. 25 -
1. Briefly describe each of the following...Ch. 25 - Prob. 2RQCh. 25 - List four distinguishing features of chordates.Ch. 25 - Describe the ways in which amphibians are adapted...Ch. 25 - 5. List the adaptations that distinguish reptiles...Ch. 25 - List the adaptations of birds that contribute to...Ch. 25 - 7. How do mammals differ from birds, and what...Ch. 25 - Prob. 1ACCh. 25 - Prob. 2AC
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