Question 1

During chemotaxis, attractants increase the rate of autophosphorylation whereas repellants decrease this rate.

Accepted Answer

A) True 
 B)False

Question 2

In catabolic repression, cells use the least abundant carbon source first.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following is a major phases of the regulation of differentiation in prokaryotes?

Accepted Answer

A)  asymmetric development of two sister cells 
B)  triggering of the response 
C)  reciprocal communication between the two differentiating cells 
D)  all of the above 
A)  asymmetric development of two sister cells 
B)  triggering of the response 
C)  reciprocal communication between the two differentiating cells 
D)  all of the above

Question 4

Most signal transduction pathways in eukaryotes rely on phosphorylation of ,________, ________and________residues of proteins, while those of Bacteria rely on phosphorylation of ________residues.

Accepted Answer

serine / threonine /

Question 5

Explain how the alarmones ppGpp and pppGpp function during amino acid starvation.

Accepted Answer

The RelA protein, which monitors activit

Question 6

When arginine is added to a culture growing exponentially in a medium without arginine, what occurs?

Accepted Answer

A)  All cellular growth ceases. 
B)  Growth continues, but the production of enzymes required for the synthesis of arginine increases. 
C)  Growth continues, but the production of enzymes required for the synthesis of arginine ceases. 
D)  The cell returns to the lag stage of growth to synthesize the proteins necessary for the metabolism of arginine. 
A)  All cellular growth ceases. 
B)  Growth continues, but the production of enzymes required for the synthesis of arginine increases. 
C)  Growth continues, but the production of enzymes required for the synthesis of arginine ceases. 
D)  The cell returns to the lag stage of growth to synthesize the proteins necessary for the metabolism of arginine.

Exam 8: Regulation of Gene Expression

During chemotaxis, attractants increase the rate of autophosphorylation whereas repellants decrease this rate.

In catabolic repression, cells use the least abundant carbon source first.

Which of the following is a major phases of the regulation of differentiation in prokaryotes?

Most signal transduction pathways in eukaryotes rely on phosphorylation of ,________, ________and________residues of proteins, while those of Bacteria rely on phosphorylation of ________residues.

Explain how the alarmones ppGpp and pppGpp function during amino acid starvation.

When arginine is added to a culture growing exponentially in a medium without arginine, what occurs?

Microorganisms and Microbiology

A Brief Journey to the Microbial World

Cell Structure and Function in Bacteria and Archaea

Nutrition, Culture, and Metabolism of Microorganisms

Microbial Growth

Molecular Biology of Bacteria

Archael and Eukaryotic Molecular Biology

Viruses and Virology

Genetics of Bacteria and Arachaea

Genetic Engineering

Microbial Genomics

Phototrophy, Chemolithotrophy, and Major Biosyntheses

Catabolism of Organic Compounds

Commercial Products and Biotechnology

Microbial Evolution and Systematics

Bacteria: the Proteobacteria

Other Bacteria

Archaea

Eukaryotic Cell Biology and Eukaryotic Microorganisms

Viral Diversity

Methods in Microbial Ecology

Major Microbial Habitats and Diversity

Nutrient Cycles, Biodegradation, and Bioremediation

Microbial Symbioses

Microbial Growth Control

Microbial Interactions With Humans

Immunity and Host Defense

Immune Mechanisms

Molecular Immunology

Diagnostic Microbiology and Immunology

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Person-To-Person Microbial Diseases

Vectorborne and Soilborne Microbial Pathogens

Wastewater Treatment, Water Purification, and Waterborne Microbial Diseases

Food Preservation and Foodborne Microbial Diseases

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Most signal transduction pathways in eukaryotes rely on phosphorylation of ,, andresidues of proteins, while those of Bacteria rely on phosphorylation of residues.