Question 1

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

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

DNA is composed of double-ring nitrogenous bases,whereas RNA is composed of single-ring nitrogenous bases.

Accepted Answer

A) True 
 B)False

Question 4

Naked DNA is called chromatin.

Accepted Answer

A) True 
 B)False

Question 5

Which of these is the correct sequence from simple to more complex?

Accepted Answer

A)   Chromatin,carbon,nucleotide,nitrogenous base,DNA
B)   Carbon,nitrogenous base,nucleotide,chromatin,DNA
C)   Chromatin,DNA,nucleotide,nitrogenous base,carbon
D)   Carbon,nucleotide,nitrogenous base,chromatin,DNA
E)   Carbon,nitrogenous base,nucleotide,DNA,chromatinF) B) and D)
G) A) and C)

Question 6

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

Question 7

The genetic code is the link between the __________ and the __________ that they represent.

Accepted Answer

A)   DNA molecule;20 amino acids
B)   DNA molecule;64 amino acids
C)   mRNA anticodons;20 amino acids
D)   mRNA codons;64 amino acids
E)   mRNA codons;20 amino acidsF) A) and B)
G) A) and C)

Question 8

The human genome consists of approximately __________ pairs of nucleotides.

Accepted Answer

A)   3 billion
B)   3 million
C)   300,000
D)   3000E) All of the above
F) None of the above

Question 9

In familial hypercholesterolemia,individuals with two abnormal alleles die of heart attacks in childhood,those with only one abnormal allele typically die as young adults,and those with two normal alleles have normal life expectancies.This exemplifies __________.

Accepted Answer

A)   penetrance
B)   codominance
C)   pleiotropy
D)   complete dominance
E)   incomplete dominanceF) B) and E)
G) B) and D)

Question 10

What is all of the DNA in a set of 23 chromosomes referred to as?

Accepted Answer

A)   A centromere
B)   A chromatid
C)   The karyotype
D)   The phenotype
E)   The genomeF) A) and B)
G) None of the above

Question 11

Sister chromatids are pulled to opposite poles of a cell during __________ of the cell cycle.

Accepted Answer

A)   the S phase
B)   the G2 phase
C)   prophase
D)   metaphase
E)   anaphaseF) A) and E)
G) B) and E)

Question 12

Which of these cannot cause a mutation?

Accepted Answer

A)   Radiation
B)   A virus
C)   A chemical
D)   A mistake made by the DNA polymerase
E)   A mistake made by the RNA polymeraseF) C) and D)
G) B) and C)

Question 13

DNA polymerase is most active during which phase of the cell cycle?

Accepted Answer

A)   S
B)   G1
C)   G2
D)   M
E)   G0F) C) and E)
G) None of the above

Question 14

Cytokinesis overlaps with which phase of mitosis?

Accepted Answer

A)   The S phase
B)   Telophase
C)   Metaphase
D)   Prophase
E)   InterphaseF) B) and E)
G) C) and E)

Question 15

What is the product of translation?

Accepted Answer

A)   A newly synthesized amino acid
B)   A newly synthesized polypeptide
C)   A newly synthesized nucleic acid
D)   An mRNA
E)   A tRNAF) A) and D)
G) C) and D)

Question 16

After mitosis,each chromosome consists of two parallel filaments called sister chromatids.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

Hemophilia is caused by a sex-linked recessive allele.This means that __________.

Accepted Answer

A)   women can be carriers but cannot get hemophilia
B)   the gene is found on the Y chromosome
C)   a man can give the allele to his son but not to his daughter
D)   a son who has hemophilia inherited the allele from his mother
E)   a son who has hemophilia inherited the allele from his fatherF) D) and E)
G) B) and C)

Question 19

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

Accepted Answer

A) True 
 B)False

Question 20

Germ cells have __________ unpaired chromosomes and are thus called __________ cells.

Accepted Answer

A)   23;somatic
B)   23;haploid (n) 
C)   23;diploid (2n) 
D)   46;somatic
E)   46;diploid (2n) F) D) and E)
G) A) and B)

Exam 4: Genetics of Cellular Function

Naked DNA is called chromatin.

Correct AnswerverifiedShow Answer

DNA polymerase is most active during which phase of the cell cycle?

Correct AnswerverifiedShow Answer

In familial hypercholesterolemia,individuals with two abnormal alleles die of heart attacks in childhood,those with only one abnormal allele typically die as young adults,and those with two normal alleles have normal life expectancies.This exemplifies __________.

Correct AnswerverifiedShow Answer

Germ cells have __________ unpaired chromosomes and are thus called __________ cells.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of these is the correct sequence from simple to more complex?

Correct AnswerverifiedShow Answer

What is all of the DNA in a set of 23 chromosomes referred to as?

Correct AnswerverifiedShow Answer

DNA is composed of double-ring nitrogenous bases,whereas RNA is composed of single-ring nitrogenous bases.

Correct AnswerverifiedShow Answer

Which of these cannot cause a mutation?

Correct AnswerverifiedShow Answer

After mitosis,each chromosome consists of two parallel filaments called sister chromatids.

Correct AnswerverifiedShow Answer

Cytokinesis overlaps with which phase of mitosis?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The human genome consists of approximately __________ pairs of nucleotides.

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

The genetic code is the link between the __________ and the __________ that they represent.

Correct AnswerverifiedShow Answer

Hemophilia is caused by a sex-linked recessive allele.This means that __________.

Correct AnswerverifiedShow Answer

What is the product of translation?

Correct AnswerverifiedShow Answer

Sister chromatids are pulled to opposite poles of a cell during __________ of the cell cycle.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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Germ cells have unpaired chromosomes and are thus called cells.

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The genetic code is the link between the and the that they represent.

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