Quiz 6 - Bonus

Question 1

The pairs of chromosomes that are not involved in sex determination are known as:

A) Y chromosomes

B) peroxisomes

C) X chromosomes

D) autosomes

Answer 1

D) autosomes

Question 2

The inactivation of one of the X chromosomes forms a structure known as a(n):

A) autosome

B) centromere

C) Barr body

D) telomere

Answer 2

C) Barr body

Question 3

The condition of having three complete sets of chromosomes is known as:

A) aneuploidy

B) triploidy

C) trisomy

D) monosomy

Answer 3

C) triploidy

Question 4

The condition of having one extra copy of a particular chromosome is known as:

A) monosomy

B) polyploidy

C) trisomy

D) triploidy

Answer 4

C) trisomy

Question 5

In humans, which of the following would be phenotypically male?

A) XXX individuals

B) XXY individuals

C) XX individuals

D) XO individuals

Answer 5

B) XXY individuals

Question 6

An individual possessing two copies of the same sex chromosomes is known as:

A) homogametic

B) diploid

C) homozygous

D) heterogametic

Answer 6

A) homogametic

Question 7

The process of copying a gene’s DNA sequence into a sequence of mRNA is called:

A) transcription

B) translation

C) replication

D) polymerization

Answer 7

A) transcription

Question 8

During DNA replication, the bases of complementary strands always pair as:

A) A with T, G with C

B) A with G, C with T

C) A with U, G with C

D) A with C, G with T

Answer 8

A) A with T, G with C

Question 9

The enzyme that separates the two strands of a DNA molecule during replication is:

A) primase

B) helicase

C) DNA ligase

D) DNA polymerase

Answer 9

B) helicase

Question 10

The enzyme responsible for adding new nucleotides to a growing strand of DNA is:

A) DNA ligase

B) helicase

C) primase

D) DNA polymerase

Answer 10

D) DNA polymerase

Question 11

The synthesis of mRNA from a DNA template is known as:

A) translation

B) methylation

C) phosphorylation

D) transcription

Answer 11

D) transcription

Question 12

The synthesis of a polypeptide chain from an mRNA sequence is known as:

A) methylation

B) translation

C) phosphorylation

D) transcription

Answer 12

B) translation

Question 13

Each codon in mRNA consists of how many nucleotides?

A) four

B) two

C) one

D) three

Answer 13

D) three

Question 14

A DNA strand with the sequence AACGTAACG is transcribed. What is the sequence of the mRNA molecule synthesized?

A) AACGUAACG

B) UUGCAUUGC

C) AACGTAACG

D) TTGCATTGC

Answer 14

B) UUGCAUUGC

Question 15

Which is not a form of RNA?

A)mRNA

B) tRNA

C) dRNA

D) rRNA

Answer 15

C) dRNA

Question 16

RNA contains which bases?

A) adenine, thymine, guanine, cytosine

B) adenine, uracil, guanine, cytosine

C) adenine, thymine, guanine, uracil

D) cytosine, thymine, guanine, uracil

Answer 16

B) adenine, uracil, guanine, cytosine

Question 17

Why is DNA replication considered semi-conservative?

Answer 17

Because when a DNA molecule
is replicated, each of the two DNA molecules that result is half
old and half new.