Question 1

The structure of DNA explains both its ability to encode genetic information and the way in which it is copied during cell reproduction.

Accepted Answer

A) True 
 B)False

Question 2

A(n)(genome/codon/operon)is a set of prokaryotic genes that are regulated and transcribed as a unit.

Accepted Answer

The answer of A(n)(genome/codon/operon)is a set of prokaryotic genes that...

Question 3

Which of the following are considered to be frameshift mutations?

Accepted Answer

A)  insertions only 
B)  inversions only 
C)  deletions only 
D)  both inversion and insertions 
E)  both deletions and insertions 
A)  insertions only 
B)  inversions only 
C)  deletions only 
D)  both inversion and insertions 
E)  both deletions and insertions

Question 4

Loosely packed,transcriptionally active regions of a eukaryotic chromosome are called (euchromatin/heterochromatin/nucleosomes).

Accepted Answer

The answer of Loosely packed,transcriptionally active regions of a eukaryotic...

Question 5

Two bacterial strains have the same genes for metabolizing a carbohydrate,but one is wild-type for a regulatory inducer while the genetic variant does not produce the inducer.Which of the following statements is CORRECT with regard to the metabolic pathway enzymes?

Accepted Answer

A)  The bacteria have the same phenotype. 
B)  The bacteria have the same genotype but different phenotypes. 
C)  The genotypes and phenotypes of the bacteria are the same. 
D)  The bacteria are phenotypically the same but have different genotypes. 
E)  The answer cannot be determined from the information provided. 
A)  The bacteria have the same phenotype. 
B)  The bacteria have the same genotype but different phenotypes. 
C)  The genotypes and phenotypes of the bacteria are the same. 
D)  The bacteria are phenotypically the same but have different genotypes. 
E)  The answer cannot be determined from the information provided.

Question 6

A chemical is reported to inhibit bacterial replication.Bacterial cells are placed in medium with all nutrients necessary for replication.The chemical is added to the culture,and after a half hour an extract of the DNA is prepared.A significant percentage of the DNA is in pieces about 1000 to 2000 bases in length.The results are consistent with the chemical blocking the function of DNA ligase.

Accepted Answer

A) True 
 B)False

Question 7

Errors made during replication are primarily corrected by (base-excision/mismatch/nucleotide-excision)repair.

Accepted Answer

The answer of Errors made during replication are primarily corrected...

Question 8

Describe the basic similarities and differences between DNA replication and transcription.

Accepted Answer

DNA replication and transcription are si

Question 9

Bacterial chromosomes typically have several origins of replication.

Accepted Answer

A) True 
 B)False

Question 10

Which of the following is found in both archaeal and eukaryotic genomes?

Accepted Answer

A)  chromatin fibers 
B)  histones 
C)  heterochromatin 
D)  euchromatin 
E)  nuclear envelope 
A)  chromatin fibers 
B)  histones 
C)  heterochromatin 
D)  euchromatin 
E)  nuclear envelope

Question 11

Describe the various types of nucleic acids that are typically found in cells.

Accepted Answer

All cells possess one or more DNA molecu

Question 12

Acridine dyes distort the structure of DNA causing (frameshift/missense/nonsense)mutations in gene sequences.(Answer in terms of the effect on gene function.)

Accepted Answer

The answer of Acridine dyes distort the structure of DNA...

Question 13

Which of the following is found at the 5' end of a DNA strand?

Accepted Answer

A)  a phosphate group 
B)  a hydrogen bond 
C)  a hydroxyl group 
D)  histones 
E)  a methyl group 
A)  a phosphate group 
B)  a hydrogen bond 
C)  a hydroxyl group 
D)  histones 
E)  a methyl group

Question 14

Transfer of random pieces of DNA mediated by phage is known as

Accepted Answer

A)  transformation of competent cells. 
B)  generalized transduction. 
C)  conjugation. 
D)  transposition. 
E)  specialized transduction. 
A)  transformation of competent cells. 
B)  generalized transduction. 
C)  conjugation. 
D)  transposition. 
E)  specialized transduction.

Question 15

The bacterial chromosome is

Accepted Answer

A)  usually circular. 
B)  found in a nucleoid. 
C)  found in a nucleus. 
D)  both circular and found in a nucleoid. 
E)  both circular and found in a nucleus. 
A)  usually circular. 
B)  found in a nucleoid. 
C)  found in a nucleus. 
D)  both circular and found in a nucleoid. 
E)  both circular and found in a nucleus.

Question 16

Which of the following is required for transposition?

Accepted Answer

A)  F+ plasmid 
B)  bacteriophage 
C)  insertion sequence 
D)  inverted repeat 
E)  competence 
A)  F+ plasmid 
B)  bacteriophage 
C)  insertion sequence 
D)  inverted repeat 
E)  competence

Question 17

Amino acids are delivered in their appropriate order by

Accepted Answer

A)  mRNAs. 
B)  RNA-induced silencing complexes (RIS
C)  
C)  ribozymes. 
D)  rRNAs. 
E)  tRNAs. 
A)  mRNAs. 
B)  RNA-induced silencing complexes (RIS
C)  
C)  ribozymes. 
D)  rRNAs. 
E)  tRNAs.

Question 18

Codons are recognized during

Accepted Answer

A)  translation. 
B)  transcription. 
C)  base excision. 
D)  DNA replication. 
E)  transduction. 
A)  translation. 
B)  transcription. 
C)  base excision. 
D)  DNA replication. 
E)  transduction.

Question 19

Which of the following is NOT involved in the regulation of the lac operon?

Accepted Answer

A)  an inducer 
B)  a repressor protein 
C)  an iRNA 
D)  glucose 
E)  cyclic AMP 
A)  an inducer 
B)  a repressor protein 
C)  an iRNA 
D)  glucose 
E)  cyclic AMP

Question 20

The (codon/anticodon/loop)of a transfer RNA molecule is complementary to a codon in a messenger RNA molecule.

Accepted Answer

The answer of The (codon/anticodon/loop)of a transfer RNA molecule is...

Exam 7: Microbial Genetics

The structure of DNA explains both its ability to encode genetic information and the way in which it is copied during cell reproduction.

A(n)(genome/codon/operon)is a set of prokaryotic genes that are regulated and transcribed as a unit.

Which of the following are considered to be frameshift mutations?

Loosely packed,transcriptionally active regions of a eukaryotic chromosome are called (euchromatin/heterochromatin/nucleosomes).

Two bacterial strains have the same genes for metabolizing a carbohydrate,but one is wild-type for a regulatory inducer while the genetic variant does not produce the inducer.Which of the following statements is CORRECT with regard to the metabolic pathway enzymes?

Errors made during replication are primarily corrected by (base-excision/mismatch/nucleotide-excision)repair.

Describe the basic similarities and differences between DNA replication and transcription.

Bacterial chromosomes typically have several origins of replication.

Which of the following is found in both archaeal and eukaryotic genomes?

Describe the various types of nucleic acids that are typically found in cells.

Acridine dyes distort the structure of DNA causing (frameshift/missense/nonsense)mutations in gene sequences.(Answer in terms of the effect on gene function.)

Which of the following is found at the 5' end of a DNA strand?

Transfer of random pieces of DNA mediated by phage is known as

The bacterial chromosome is

Which of the following is required for transposition?

Amino acids are delivered in their appropriate order by

Codons are recognized during

Which of the following is NOT involved in the regulation of the lac operon?

The (codon/anticodon/loop)of a transfer RNA molecule is complementary to a codon in a messenger RNA molecule.

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Recombinant DNA Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Immune Disorders

Pathogenic Gram Positive Bacteria

Pathogenic Gram-Negative Cocci and Bacilli

Rickettsias, Chlamydias, Spirochetes, and Vibrios

Pathogenic Fungi

Parasitic Protozoa, Helminths, and Arthropod Vectors

Pathogenic DNA Viruses

Pathogenic RNA Viruses

Applied and Environmental Microbiology

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