Quiz 3 Biol 1406; ch9-10
1.
The individual nucleotides which make up a single strand of DNA are connected
to the nucleotides above and below them (or to the 5’ and 3’ sides if you
prefer--NOT CONNECTING TWO STRANDS OF THE DUPLEX to each other) by:
a.
peptide bonds.
b.
hydrogen bonds.
c.
phosphodiester bonds.
d.
reversible bonding.
e.
faith.
2.
In a DNA duplex, the base A is always paired with:
a.
guanine.
b.
cytosine.
c.
thymine.
d.
uracil.
e.
deoxyribose.
3.
An inactivated “X” chromosome in a human female cell is seen as a/an:
a.
centrosome.
b.
Barr body.
c.
genetic imprint.
d.
nucleosome.
e.
centromere.
4.
During DNA replication, the "lagging strand" is synthesized as a series of
small DNA fragments which are later connected into a continuous DNA molecule.
These short segments are called :
a.
Okazaki fragments.
b.
replicons.
c.
replication forks.
d.
transcription units.
e.
Griffith units.
5.
The enzyme which unwinds the DNA helix, allowing replication to occur is
called:
a.
primase.
b.
DNA replicase.
c.
reverse transcriptase.
d.
helicase.
e.
DNA litigase.
6.
The base pairs between two strands of a DNA molecule are held together by:
a.
phosphodiester bonds.
b.
ionic bonds involving the phosphate groups.
c.
polar covalent bonds.
d.
hydrogen bonds.
e.
a combination of all of the above.
7.
The location on a chromosome where DNA replication begins is called a/an:
a.
origin (ori).
b.
promoter.
c.
centromere.
d.
telomere.
e.
initiator.
8.
The enzyme which removes the primers during DNA replication is:
a.
primase.
b.
DNA polymerase
c.
gyrase.
d.
RNA polymerase
e.
helicase.
9. X-ray diffraction studies from ____________ revealed the double helix shape of
the DNA.
a. Watson and Crick
b. Mendel
c. Beadle and Tatum
d. Rosalin Franklin
e. Griffith
10.
The enzyme used in Transcription is:
a.
primase.
b.
DNA polymerase
c.
gyrase.
d.
RNA polymerase
e.
helicase.