Question 1

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) C) and D)
G) A) and B)

Question 2

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 C)
G) A) and E)

Question 3

Phenotype is the result of genetic influences only.

Accepted Answer

A) True 
 B)False

Question 4

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) B) and D)
G) C) and E) A

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) C) and D)

Question 6

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) C) and D)
G) A) and B)

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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) B) and E)
G) B) and C) C

Question 9

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) All of the above
G) C) and D)

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

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) B) and D)
G) A) and C)

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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) A) and B)
G) A) and E)

Question 14

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

Accepted Answer

A) True 
 B)False

Question 15

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) B) and C)
G) None of the above

Question 16

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) A) and D)

Question 17

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) A) and E)
G) B) and C)

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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 20

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

Accepted Answer

A) True 
 B)False  True

Exam 4: Genes and Cellular Function

All the DNA in one 23-chromosome set is called

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

Phenotype is the result of genetic influences only.

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

All of the following are directly involved in translation except

Correct AnswerverifiedShow Answer

All these can cause a mutation except

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedC

Sister chromatids migrate to opposite poles of a cell during

Correct AnswerverifiedShow Answer

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

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

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedTrue

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A

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C

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True