Question 1

Phenotype is the result of genetic influences only.

Accepted Answer

A) True 
 B)False

Question 2

If one allele is not phenotypically expressed in the presence of another, we say that it is a(an)  allele.

Accepted Answer

A)  homozygous
B)  heterozygous
C)  recessive
D)  dominant
E)  suppressedF) C) and D)
G) All of the above

Question 3

A contains the necessary information for the production of a molecule of RNA.

Accepted Answer

A)  genome
B)  gene
C)  nucleotide
D)  genetic code
E)  codonF) A) and E)
G) All of the above

Question 4

All proteins made by the ribosomes are exported from a cell for use elsewhere in the body.

Accepted Answer

A) True 
 B)False

Question 5

All of the following are directly involved in translation except

Accepted Answer

A)  DNA.
B)  mRNA.
C)  tRNA.
D)  rRNA.
E)  ribosomes.F) A) and C)
G) A) and E)

Question 6

All the DNA in one 23-chromosome set is called

Accepted Answer

A)  the chromosome.
B)  a chromatid.
C)  chromatin.
D)  the gene.
E)  the genome.F) B) and E)
G) A) and C)

Question 7

Anticodons, codons, and base triplets correspond to , respectively.

Accepted Answer

A)  tRNA, DNA, and mRNA
B)  DNA, tRNA, and mRNA
C)  tRNA, mRNA, and DNA
D)  DNA, RNA, and pre-mRNA
E)  RNA, DNA, and pre-mRNAF) A) and C)
G) B) and D) C

Question 8

This figure shows the DNA structure.What does "D" represent?

Accepted Answer

A)  hydrogen bonds
B)  peptide bonds
C)  polar bonds
D)  a nucleotide
E)  a fragment of the sugar-phosphate backboneF) C) and D)
G) A) and D)

Question 9

DNA never migrates from the nucleus to the cytoplasm to participate directly in protein synthesis.

Accepted Answer

A) True 
 B)False

Question 10

If a DNA molecule was known to be 22% thymine (T) , what would be the percentage of guanine (G) ?

Accepted Answer

A)  8%
B)  11%
C)  22%
D)  28%
E)  78%F) A) and B)
G) A) and C)

Question 11

A human cell starting prophase has 92 molecules of DNA in its nucleus.

Accepted Answer

A) True 
 B)False

Question 12

Oncogenes and tumor-suppressor genes have similar effects on cell division.

Accepted Answer

A) True 
 B)False

Question 13

Copying genetic information from DNA into RNA is called , whereas using the information contained in mRNA to make a polypeptide is called
)

Accepted Answer

A)  transcription; translation
B)  translation; transcription
C)  DNA replication; translation
D)  DNA duplication; transcription
E)  DNA translation; RNA transcriptionF) C) and D)
G) A) and B) A

Question 14

Sister chromatids migrate to opposite poles of a cell during

Accepted Answer

A)  S phase.
B)  G2 phase.
C)  prophase.
D)  metaphase.
E)  anaphase.F) C) and E)
G) A) and B)

Question 15

Although all cells synthesize phospholipids, there are no genes for phospholipids.

Accepted Answer

A) True 
 B)False  True

Question 16

A gene can be defined as an information-containing segment of RNA that codes for the production of
a polypeptide.

Accepted Answer

A) True 
 B)False

Question 17

All these can cause a mutation except

Accepted Answer

A)  radiation.
B)  viruses.
C)  chemicals.
D)  a mistake made by the DNA polymerase.
E)  a mistake made by the RNA polymerase.F) All of the above
G) A) and E)

Question 18

There are three codons that do not code for any amino acid.

Accepted Answer

A) True 
 B)False

Question 19

This figure shows the DNA structure.What does "B" represent?

Accepted Answer

A)  a nucleotide
B)  a phosphate group
C)  a deoxyribose
D)  a pyrimidine
E)  a purineF) C) and E)
G) A) and E)

Question 20

The allele for cleft chin (C)  is dominant to the allele for uncleft chin (c) .A male and female who are both heterozygous for cleft chin have a child.What is the chance that this child will have an uncleft chin?

Accepted Answer

A)  0
B)  25%
C)  50%
D)  75%
E)  100%F) B) and E)
G) None of the above

Exam 4: Genes and Cellular Function

Phenotype is the result of genetic influences only.

Correct AnswerverifiedShow Answer

If one allele is not phenotypically expressed in the presence of another, we say that it is a(an) allele.

Correct AnswerverifiedShow Answer

A contains the necessary information for the production of a molecule of RNA.

Correct AnswerverifiedShow Answer

All proteins made by the ribosomes are exported from a cell for use elsewhere in the body.

Correct AnswerverifiedShow Answer

All of the following are directly involved in translation except

Correct AnswerverifiedShow Answer

All the DNA in one 23-chromosome set is called

Correct AnswerverifiedShow Answer

Anticodons, codons, and base triplets correspond to , respectively.

Correct AnswerverifiedC

This figure shows the DNA structure.What does "D" represent?

Correct AnswerverifiedShow Answer

DNA never migrates from the nucleus to the cytoplasm to participate directly in protein synthesis.

Correct AnswerverifiedShow Answer

If a DNA molecule was known to be 22% thymine (T) , what would be the percentage of guanine (G) ?

Correct AnswerverifiedShow Answer

A human cell starting prophase has 92 molecules of DNA in its nucleus.

Correct AnswerverifiedShow Answer

Oncogenes and tumor-suppressor genes have similar effects on cell division.

Correct AnswerverifiedShow Answer

Copying genetic information from DNA into RNA is called , whereas using the information contained in mRNA to make a polypeptide is called )

Correct AnswerverifiedA

Sister chromatids migrate to opposite poles of a cell during

Correct AnswerverifiedShow Answer

Although all cells synthesize phospholipids, there are no genes for phospholipids.

Correct AnswerverifiedTrue

A gene can be defined as an information-containing segment of RNA that codes for the production of a polypeptide.

Correct AnswerverifiedShow Answer

All these can cause a mutation except

Correct AnswerverifiedShow Answer

There are three codons that do not code for any amino acid.

Correct AnswerverifiedShow Answer

This figure shows the DNA structure.What does "B" represent?

Correct AnswerverifiedShow Answer

The allele for cleft chin (C) is dominant to the allele for uncleft chin (c) .A male and female who are both heterozygous for cleft chin have a child.What is the chance that this child will have an uncleft chin?

Correct AnswerverifiedShow Answer

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C

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A

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True

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