Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 4.3, Problem 1TQ
Summary Introduction
To review:
The
Introduction:
The genetic composition of an organism is termed as genotype. The genotype may vary in many aspects. The physical appearance or the growth characteristic of an organism is termed as phenotype of that organism. The phenotype is influenced and characterized by the genotype.
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For each of the following genotypes, explain how mutation (identified by a (-) will affect the
organism grown in lactose medium. Indicate whether
a) B-galactosidase will be synthesized or not,
b) synthesis of B-galactosidase is inducible (1) or constitutive (C) and
c) growth of the organism will occur or not.
i. I+P+0-Z+Y+A+/l+P+O+Z-Y-A-
ii. I-P+0+Z+Y+A+/I+P-O+Z+Y+A+
What defect in the cell causes the condition known as Zellweger's syndrome, ZS? Explain in detail and what is known about the genetics. What do the peroxisomes of ZS patients look like?
Yeast cells are eukaryotes, and they require a functional secretory pathway to grow and to maintain cellular organization. But surprisingly, when SRP is removed from yeast cells by deleting the relevant genes, the cells are still alive (although they grow slowly).
a) How can yeast survive without SRP? Propose two alternative hypotheses.
b) How might electron microscopy of normal and SRP-deficient yeast cells help you to distinguish between these two hypotheses?
Chapter 4 Solutions
Microbiology: An Evolving Science (Fourth Edition)
Ch. 4.1 - Prob. 1TQCh. 4.2 - Prob. 1TQCh. 4.2 - Prob. 2TQCh. 4.3 - Prob. 1TQCh. 4.3 - Prob. 2TQCh. 4.3 - Prob. 3TQCh. 4.3 - Prob. 4TQCh. 4.4 - Prob. 1TQCh. 4.4 - Prob. 2TQCh. 4.4 - Prob. 3TQ
Ch. 4.4 - Prob. 4TQCh. 4.4 - Prob. 5TQCh. 4.4 - Prob. 6TQCh. 4.4 - Prob. 7TQCh. 4.4 - Prob. 8TQCh. 4.6 - Prob. 1TQCh. 4 - Prob. 1RQCh. 4 - Prob. 2RQCh. 4 - Prob. 3RQCh. 4 - Prob. 4RQCh. 4 - Prob. 5RQCh. 4 - Prob. 6RQCh. 4 - Prob. 7RQCh. 4 - Prob. 8RQCh. 4 - Prob. 9RQCh. 4 - Prob. 1TQCh. 4 - Prob. 2TQCh. 4 - Prob. 3TQCh. 4 - Prob. 4TQCh. 4 - Prob. 5TQCh. 4 - Prob. 6TQCh. 4 - Prob. 7TQ
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