Question 1

What is the minimum number of aminoacyl-tRNA synthetase enzymes needed to attach amino acids to all the various tRNA molecules?

Accepted Answer

A)   20
B)   61
C)   64
D)   as many as there are different tRNAsE) A) and D)
F) B) and D)

Question 2

The genetic code is translated in groups of __________ bases

Accepted Answer

A)   two
B)   three
C)   four
D)   fiveE) All of the above
F) B) and C)

Question 3

mRNA molecules have a nontranslated sequence called the __________ , which is located downstream of the termination codon.

Accepted Answer

The answer of mRNA molecules have a nontranslated sequence called...

Question 4

Split or interrupted genes have been found in eukaryotes but not in prokaryotes.

Accepted Answer

A) True 
 B)False

Question 5

Messenger RNA molecules that direct the synthesis of more than one polypeptide are said to be __________.

Accepted Answer

The answer of Messenger RNA molecules that direct the synthesis...

Question 6

The genetic information in DNA is divided into units called

Accepted Answer

A)   proteins.
B)   genes.
C)   genotype.
D)   phenotype.E) B) and D)
F) All of the above

Question 7

Which of the following is in the coding region of a gene?

Accepted Answer

A)   promoter
B)   leader
C)   trailer
D)   none of the choicesE) B) and D)
F) B) and C)

Question 8

In eukaryotes a so-called cap consisting of __________ is attached to the 5' end of the molecule during posttranscriptional modification of hnRNA to produce functional mRNA.

Accepted Answer

The answer of In eukaryotes a so-called cap consisting of...

Question 9

A complex consisting of a single mRNA molecule with several ribosomes is called a

Accepted Answer

A)   polysome.
B)   multisome.
C)   maxisome.
D)   none of the choicesE) C) and D)
F) B) and D)

Question 10

DNA functions as a storage molecule, holding genetic information for the lifetime of a cellular organism and allowing that information to be duplicated and passed on to its progeny.

Accepted Answer

A) True 
 B)False

Question 11

The genetic code is usually translated in a nonoverlapping fashion.

Accepted Answer

A) True 
 B)False

Question 12

Posttranscriptional modifications that yield eukaryotic mRNAs include which of the following?

Accepted Answer

A)   splicing to remove introns
B)   5' poly (
A)   tracts
C)   3' caps
D)   all of the choicesE) All of the above
F) A) and B)

Question 13

Because of its larger size, the replication rate of eukaryotic genomes is significantly faster than the replication rate of prokaryotic genomes.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following is true about the structure of DNA?

Accepted Answer

A)   Purine and pyrimidine bases are attached to the 1'-carbon of the deoxyribose sugars.
B)   Purine and pyrimidine bases are joined by phosphodiester bonds.
C)   Adjacent bases are stacked on top of each other, one base pair every 0.34 nm.
D)   all of the choicesE) A) and C)
F) A) and B)

Question 15

The __________ reaction sequentially links adjacent amino acids into the growing polypeptide chain.

Accepted Answer

A)   dipeptidation
B)   transpeptidation
C)   peptidation
D)   propeptidationE) B) and C)
F) All of the above

Question 16

The noncoding sequences located between the start codon and the stop codon in interrupted genes are called introns.

Accepted Answer

A) True 
 B)False

Question 17

When a DNA molecule is replicated, the daughter molecules contain one strand of parental DNA and one strand of newly synthesized DNA; this is called __________ replication.

Accepted Answer

A)   hemiconservative
B)   conservative
C)   semiconservative
D)   dispersiveE) B) and C)
F) None of the above

Question 18

The __________ describes the specific set of genes an organism possesses.

Accepted Answer

The answer of The __________ describes the specific set of...

Question 19

How many different termination codons are used in translation?

Accepted Answer

A)   one
B)   two
C)   three
D)   fourE) All of the above
F) None of the above

Question 20

The __________ is the collection of characteristics of an organism that an investigator observes.

Accepted Answer

The answer of The __________ is the collection of characteristics...

Exam 12: Genes Structure, Replication, and Expression

The __________ describes the specific set of genes an organism possesses.

Correct AnswerverifiedShow Answer

How many different termination codons are used in translation?

Correct AnswerverifiedShow Answer

Because of its larger size, the replication rate of eukaryotic genomes is significantly faster than the replication rate of prokaryotic genomes.

Correct AnswerverifiedShow Answer

Which of the following is in the coding region of a gene?

Correct AnswerverifiedShow Answer

The genetic information in DNA is divided into units called

Correct AnswerverifiedShow Answer

What is the minimum number of aminoacyl-tRNA synthetase enzymes needed to attach amino acids to all the various tRNA molecules?

Correct AnswerverifiedShow Answer

The genetic code is usually translated in a nonoverlapping fashion.

Correct AnswerverifiedShow Answer

Which of the following is true about the structure of DNA?

Correct AnswerverifiedShow Answer

mRNA molecules have a nontranslated sequence called the __________ , which is located downstream of the termination codon.

Correct AnswerverifiedShow Answer

The noncoding sequences located between the start codon and the stop codon in interrupted genes are called introns.

Correct AnswerverifiedShow Answer

Split or interrupted genes have been found in eukaryotes but not in prokaryotes.

Correct AnswerverifiedShow Answer

The __________ reaction sequentially links adjacent amino acids into the growing polypeptide chain.

Correct AnswerverifiedShow Answer

DNA functions as a storage molecule, holding genetic information for the lifetime of a cellular organism and allowing that information to be duplicated and passed on to its progeny.

Correct AnswerverifiedShow Answer

Messenger RNA molecules that direct the synthesis of more than one polypeptide are said to be __________.

Correct AnswerverifiedShow Answer

A complex consisting of a single mRNA molecule with several ribosomes is called a

Correct AnswerverifiedShow Answer

When a DNA molecule is replicated, the daughter molecules contain one strand of parental DNA and one strand of newly synthesized DNA; this is called __________ replication.

Correct AnswerverifiedShow Answer

The genetic code is translated in groups of __________ bases

Correct AnswerverifiedShow Answer

The __________ is the collection of characteristics of an organism that an investigator observes.

Correct AnswerverifiedShow Answer

Posttranscriptional modifications that yield eukaryotic mRNAs include which of the following?

Correct AnswerverifiedShow Answer

In eukaryotes a so-called cap consisting of __________ is attached to the 5' end of the molecule during posttranscriptional modification of hnRNA to produce functional mRNA.

Correct AnswerverifiedShow Answer

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