Week 4 Quiz Question 1 The bases are bonded to what part of the backbone of the DNA molecule? A. the 3’ carbon atom of the sugar molecule. B. the 5’ carbon atom of the sugar molecule. C. the 2’ carbon atom of the sugar molecule. D. the 1’ carbon atom of the sugar molecule. E. the 4’ carbon atom of the sugar molecule. 5 points   Question 2 What form of RNA carries instructions from the nucleus to the ribosome? A. tRNA B. mRNA C. sRNA D. bRNA E. rRNA 5 points   Question 3 Normal human body cells contain how many chromosomes? A. 46 B. 22 C. 42 D. 23 E. 44 5 points   Question 4 In eukaryotes, transcription occurs in the A. nucleus. B. ribosome. C. cytoplasm. D. cell membrane. E. mitochondria. 5 points   Question 5 We refer to the DNA code as being redundant or repetitive. This means that A. a single triplet may code for more than one amino acid. B. some codons code for the same amino acid. C. each triplet codes for one amino acid. D. each triplet codes for a different amino acid. E. one codon codes for one amino acid. 5 points   Question 6 DNA replication A. is constantly happening in a cell. B. occurs in G1 of interphase. C. takes place in the nucleus of the cell. D. occurs in the cytoplasm of the cell. E. does not require proteins. 5 points   Question 7 What enzyme is used to “glue” together the ends of cut pieces of DNA? A. RNA polymerase B. protease C. DNA polymerase D. restriction enzymes E. DNA ligase 5 points   Question 8 The fact that the two strands composing a DNA molecule are called antiparallel has to do with the orientation of the A. hydrogen bonds. B. sugar molecules. C. bases. D. sulfide bonds. E. phosphate molecules. 5 points   Question 9 The most important experimental results that suggested to Watson and Crick that DNA was in the form of a helix was A. the discovery that DNA is wound around histone proteins. B. understanding DNA replication. C. the findings of Chargaff that DNA always had equal amounts of A and T and equal amounts of G and C. D. Griffith’s results with transformation. E. X-ray data from Rosalind Franklin. 5 points   Question 10 In recombinant DNA technology, enzymes used to precisely cut DNA are called A. restriction enzymes. B. DNA ligases. C. RNA polymerases. D. DNA polymerases. E. vectors. 5 points   Question 11 The anticodon of the tRNA molecule base pairs with A. DNA. B. amino acids. C. polypeptides. D. rRNA. E. mRNA. 5 points   Question 12 DNA replication of a single DNA molecule is referred to as semiconservative because A. it results in two nonidentical DNA molecules. B. of the two DNA molecules, one is made up totally of parental DNA, while the other is entirely newly synthesized DNA. C. all the DNA strands in the two DNA molecules will have both parental and newly synthesized DNA. D. each of the two DNA molecules will consist of one parental strand and one newly synthesized strand. E. one DNA strand is replicated continu.

1. Week 4 Quiz
Question 1
The bases are bonded to what part of the backbone of the DNA
molecule?
A.
the 3’ carbon atom of the sugar molecule.
B.
the 5’ carbon atom of the sugar molecule.
C.
the 2’ carbon atom of the sugar molecule.
D.
the 1’ carbon atom of the sugar molecule.
E.
the 4’ carbon atom of the sugar molecule.
5 points
Question 2
What form of RNA carries instructions from the nucleus to the
ribosome?
A.
tRNA
B.
mRNA
C.
sRNA
D.

2. bRNA
E.
rRNA
5 points
Question 3
Normal human body cells contain how many chromosomes?
A.
46
B.
22
C.
42
D.
23
E.
44
5 points
Question 4
In eukaryotes, transcription occurs in the
A.
nucleus.
B.
ribosome.
C.
cytoplasm.
D.

3. cell membrane.
E.
mitochondria.
5 points
Question 5
We refer to the DNA code as being redundant or repetitive. This
means that
A.
a single triplet may code for more than one amino acid.
B.
some codons code for the same amino acid.
C.
each triplet codes for one amino acid.
D.
each triplet codes for a different amino acid.
E.
one codon codes for one amino acid.
5 points
Question 6
DNA replication
A.
is constantly happening in a cell.
B.
occurs in G1 of interphase.
C.
takes place in the nucleus of the cell.

4. D.
occurs in the cytoplasm of the cell.
E.
does not require proteins.
5 points
Question 7
What enzyme is used to “glue” together the ends of cut pieces
of DNA?
A.
RNA polymerase
B.
protease
C.
DNA polymerase
D.
restriction enzymes
E.
DNA ligase
5 points
Question 8
The fact that the two strands composing a DNA molecule are
called antiparallel has to do with the orientation of the
A.
hydrogen bonds.
B.
sugar molecules.
C.

5. bases.
D.
sulfide bonds.
E.
phosphate molecules.
5 points
Question 9
The most important experimental results that suggested to
Watson and Crick that DNA was in the form of a helix was
A.
the discovery that DNA is wound around histone proteins.
B.
understanding DNA replication.
C.
the findings of Chargaff that DNA always had equal amounts of
A and T and equal amounts of G and C.
D.
Griffith’s results with transformation.
E.
X-ray data from Rosalind Franklin.
5 points
Question 10
In recombinant DNA technology, enzymes used to precisely cut
DNA are called
A.
restriction enzymes.
B.

6. DNA ligases.
C.
RNA polymerases.
D.
DNA polymerases.
E.
vectors.
5 points
Question 11
The anticodon of the tRNA molecule base pairs with
A.
DNA.
B.
amino acids.
C.
polypeptides.
D.
rRNA.
E.
mRNA.
5 points
Question 12
DNA replication of a single DNA molecule is referred to as
semiconservative because
A.
it results in two nonidentical DNA molecules.

7. B.
of the two DNA molecules, one is made up totally of parental
DNA, while the other is entirely newly synthesized DNA.
C.
all the DNA strands in the two DNA molecules will have both
parental and newly synthesized DNA.
D.
each of the two DNA molecules will consist of one parental
strand and one newly synthesized strand.
E.
one DNA strand is replicated continuously, while the other must
be replicated discontinuously.
5 points
Question 13
When looking at a table depicting the genetic code, the base
sequences signify
A.
mtDNA.
B.
tRNA.
C.
rRNA.
D.
DNA.
E.
mRNA.
5 points
Question 14

8. A package of histones with DNA wrapped around them forms
spherical structures called
A.
nucleoli.
B.
lysosomes.
C.
nucleosomes.
D.
ribosomes.
E.
chromatin.
5 points
Question 15
A component of bacteria that are often used in biotechnology
are
A.
plasmids.
B.
exons.
C.
operons.
D.
polypeptides.
E.
introns.

9. 5 points
Question 16
Base pairing
A.
occurs between identical bases.
B.
occurs between A and C.
C.
takes place between sugars and phosphates on the two strands in
a helix.
D.
explains the X-ray results from Rosalind Franklin.
E.
requires hydrogen bonds.
5 points
Question 17
Hershey and Chase performed an experiment in which they used
radioactive isotopes to phosphorus and sulfur to label different
components of bacterial viruses. Their results clearly showed
that
A.
genetic material normally contains radioactive isotopes.
B.
DNA was entering into the infected bacteria.
C.
the viruses did not contain DNA.
D.

10. protein was entering into the infected bacteria.
E.
the viruses did not contain protein.
5 points
Question 18
The two subunits of the ribosome join during
A.
initiation of translation.
B.
termination of translation.
C.
promotion of transcription.
D.
elongation.
E.
termination of transcription.
5 points
Question 19
In DNA, cytosine bonds to guanine. In RNA, cytosine bonds to
A.
thymine.
B.
adenine.
C.
cytosine.
D.

11. uracil.
E.
guanine.
5 points
Question 20
What step in DNA replication precedes the pairing of
complementary bases?
A.
joining of the two strands.
B.
formation of the histone core.
C.
separation of the two strands.
D.
mitotic division.
E.
polymerization of DNA.
Week 4 Quiz
Question 1
The bases are bonded to what part of the backbone of the DNA
mol
ecule?
A.

12. the 3’ carbon atom of the sugar molecule.
B.
the 5’ carbon atom
of the sugar molecule.
C.
the 2’ carbon atom of the sugar molecule.
D.
the 1’ carbon atom of the sugar molecule.
E.
the 4’ carbon atom of the sugar molecule.
5 points
Question 2
What form of RNA carries instructions from the nucleus to the
ribosome?
A.
tRNA

13. B.
mRNA
C.
sRNA
D.
bRNA
E.
rRNA
5 points
Question 3
Normal human body cells contain how many chromosomes?
A.
46
B.

14. 22
C.
42
D.
23
E.
44
5 points
Week 4 Quiz
Question 1
The bases are bonded to what part of the backbone of the DNA
molecule?
A. the 3’ carbon atom of the sugar molecule.
B. the 5’ carbon atom of the sugar molecule.
C. the 2’ carbon atom of the sugar molecule.
D. the 1’ carbon atom of the sugar molecule.
E. the 4’ carbon atom of the sugar molecule.

15. 5 points
Question 2
What form of RNA carries instructions from the nucleus to the
ribosome?
A. tRNA
B. mRNA
C. sRNA
D. bRNA
E. rRNA
5 points
Question 3
Normal human body cells contain how many chromosomes?
A. 46
B. 22
C. 42
D. 23
E. 44
5 points