Question 1

DNA polymerase can only add new nucleotides to the 3' DNA end of the template.

Accepted Answer

A) True 
 B)False

Question 2

Split genes

Accepted Answer

A)  are common in prokaryotes and eukaryotes.
B)  only have exons initially transcribed to mRNA.
C)  have introns located only at the beginning and end of a coding region.
D)  are acted upon by spliceosomes to excise introns and then join exons.E) A) and B)
F) A) and C)

Question 3

The expression of genetic traits is referred to as the organism's

Accepted Answer

A)  genome.
B)  genotype.
C)  proteome.
D)  phenotype.
E)  proteotype.F) B) and D)
G) A) and D)

Question 4

The following pertain to ribosomes during protein synthesis except

Accepted Answer

A)  contain codons within their rRNA molecules.
B)  participate only in translation.
C)  bind to the 5' end of mRNA by their small subunit.
D)  use their large subunit to supply enzymes for peptide bonding.
E)  shift towards the 3' direction along the mRNA strand from one codon to the next.F) B) and C)
G) A) and B)

Question 5

Replication of DNA begins at a/n ___ rich area.

Accepted Answer

A)  guanine-cytosine
B)  uracil-adenine
C)  adenine-thymine
D)  adenine-cytosine
E)  guanine-adenineF) A) and B)
G) None of the above

Question 6

A sequence of bases within a gene that does not code for protein is called a/n

Accepted Answer

A)  promoter.
B)  operator.
C)  operon.
D)  exon.
E)  intron.F) A) and B)
G) B) and E)

Question 7

Base pairs in DNA are held together by _____ bonds.

Accepted Answer

A)  peptide
B)  nonpolar covalent
C)  polar covalent
D)  hydrogen
E)  sulfhydrylF) A) and E)
G) C) and E)

Question 8

Which is incorrect about purines?

Accepted Answer

A)  only found in DNA,not in RNA
B)  are nitrogenous bases
C)  always paired with a specific pyrimidine
D)  include adenine and guanine
E)  found within nucleotidesF) A) and B)
G) None of the above

Question 9

Which of the following is not true of transposons?

Accepted Answer

A)  can change pigmentation
B)  can replace damaged DNA
C)  can transfer drug resistance
D)  can change the genome
E)  are always part of plasmidsF) A) and E)
G) C) and E)

Question 10

The most serious type of mutation is a ___ mutation.

Accepted Answer

A)  point
B)  silent
C)  frameshift
D)  backE) B) and C)
F) A) and D)

Question 11

Each nucleotide is composed of

Accepted Answer

A)  one phosphate,one nitrogenous base,and one sugar.
B)  one phosphate,one nitrogenous base,and two sugars.
C)  two phosphates,one nitrogenous base,and one sugar.
D)  two phosphates,one nitrogenous base,and two sugars.
E)  one phosphate,two nitrogenous bases,and one sugar.F) B) and C)
G) D) and E)

Question 12

The site where the old DNA strands separate and new DNA strands will be synthesized is called the

Accepted Answer

A)  primer.
B)  Okazaki fragment.
C)  template.
D)  rolling circle.
E)  replication fork.F) None of the above
G) D) and E)

Question 13

DNA replication proceeds in one direction around the bacterial chromosome.

Accepted Answer

A) True 
 B)False

Question 14

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT,what type of mutation would change the sequence to THE CAT ATA ETH EBI GRA T?

Accepted Answer

A)  missense
B)  nonsense
C)  insertion
D)  deletion
E)  silentF) B) and E)
G) None of the above

Question 15

Which of the following additions have been made to principles of the central dogma of biology?

Accepted Answer

A)  DNA information cannot be converted into RNA information.
B)  Protein information can be converted into DNA information.
C)  RNA can be used to regulate gene function.
D)  DNA codes for proteins.E) B) and C)
F) None of the above

Question 16

Which is incorrect about inducible operons?

Accepted Answer

A)  have genes turned off by a buildup of end product
B)  are often for use in catabolic pathways
C)  are normally turned off
D)  are turned on by the substrate of the enzyme
E)  include the lac operonF) D) and E)
G) A) and B)

Question 17

The RNA molecules that carry amino acids to the ribosomes during protein synthesis are called

Accepted Answer

A)  ribosomal RNA.
B)  messenger RNA.
C)  transfer RNA.
D)  primer RNA.
E)  ribozymes.F) A) and E)
G) A) and B)

Question 18

Which cell can transfer the most DNA?

Accepted Answer

A)  F+ cell
B)  F- cell
C)  Hfr cell
D)  R cell
E)  B cellF) B) and D)
G) A) and B)

Question 19

The smallest unit of heredity is a chromosome.

Accepted Answer

A) True 
 B)False

Question 20

The three-base sequence on DNA that codes for an amino acid is called a/n

Accepted Answer

A)  codon.
B)  exon.
C)  anticodon.
D)  intron.
E)  triplet.F) A) and D)
G) A) and C)

Exam 9: Microbial Genetics

Each nucleotide is composed of

Correct AnswerverifiedShow Answer

Which is incorrect about inducible operons?

Correct AnswerverifiedShow Answer

If the wild type DNA sequence reads THE CAT ATE THE BIG RAT,what type of mutation would change the sequence to THE CAT ATA ETH EBI GRA T?

Correct AnswerverifiedShow Answer

Replication of DNA begins at a/n ___ rich area.

Correct AnswerverifiedShow Answer

The following pertain to ribosomes during protein synthesis except

Correct AnswerverifiedShow Answer

Split genes

Correct AnswerverifiedShow Answer

DNA polymerase can only add new nucleotides to the 3' DNA end of the template.

Correct AnswerverifiedShow Answer

The site where the old DNA strands separate and new DNA strands will be synthesized is called the

Correct AnswerverifiedShow Answer

A sequence of bases within a gene that does not code for protein is called a/n

Correct AnswerverifiedShow Answer

Base pairs in DNA are held together by _____ bonds.

Correct AnswerverifiedShow Answer

Which cell can transfer the most DNA?

Correct AnswerverifiedShow Answer

Which of the following additions have been made to principles of the central dogma of biology?

Correct AnswerverifiedShow Answer

The three-base sequence on DNA that codes for an amino acid is called a/n

Correct AnswerverifiedShow Answer

The RNA molecules that carry amino acids to the ribosomes during protein synthesis are called

Correct AnswerverifiedShow Answer

DNA replication proceeds in one direction around the bacterial chromosome.

Correct AnswerverifiedShow Answer

Which is incorrect about purines?

Correct AnswerverifiedShow Answer

The smallest unit of heredity is a chromosome.

Correct AnswerverifiedShow Answer

The expression of genetic traits is referred to as the organism's

Correct AnswerverifiedShow Answer

Which of the following is not true of transposons?

Correct AnswerverifiedShow Answer

The most serious type of mutation is a ___ mutation.

Correct AnswerverifiedShow Answer

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