BIOL 133 Week 10 Quiz | Assignment Help | APUS
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BIOL 133 Week 10 Quiz | Assignment Help | APUS
Week 10 Quiz
Question 1 of 10
Some scientists have
proposed that the earliest forms of life may have existed in an “RNA World”
where RNA was both the genetic material and responsible for enzymatic activity.
Imagine that you have recreated such a life form. What would demonstrate that
RNA, but not protein or DNA, is necessary and sufficient for these functions?
o
The organism lives and replicates despite
RNase and DNase treatment, but the organism dies when treated with protease.
o
The organism lives and replicates despite
protease and DNase treatment, but the organism dies when treated with RNase.
o
The organism lives and replicates despite
protease treatment, but the organism dies when treated with DNase and RNase.
o
The organism lives and replicates despite
DNase treatment, but the organism dies when treated with RNase and protease.
Question 2 of 10
Why do purines have to
pair with a pyrimidine?
o
Allows DNA to be antiparallel
o
The distance between hydrogen bonds
remains constant
o
The distance between the two phophodiester
backbones remain constant
A mutation causes a codon
to change from UAC to UAU, both of which specify tyrosine. This is an example
of
A. a frameshift mutation
B. missense mutation
C. silent mutation
D. nonsense mutation
Question 4 of 10
Frameshift mutations
occur when
o
bases are added or deleted
o
there is an amino acid substitution
o
there is a transition substitution
o
transversion substitution
Question 5 of 10
Chargaff’s rule is
supported by what statement?
o
A + T and C + G
o
A + C and T + G
o
A + G = T + C
o
A - T + G - C
o
A + T + G = C
Question 6 of 10
If a DNA sample from an
unknown organism has telomerase, the organism
o
Is prokaryotic
o
Is eukaryotic
o
Will have a single origin of replication
o
Is bacteria
o
Has circular DNA
What is a major
difference between DNA polymerase I and DNA polymerase III?
o
DNA polymerase I synthesizes DNA on
leading strands and DNA polymerase III synthesizes DNA on lagging strands
o
DNA polymerase I synthesizes DNA on
lagging strands and DNA polymerase III synthesizes DNA on leading strands
o
DNA polymerase I repairs DNA and DNA
polymerase III synthesizes DNA in the 3׳ to 5׳ direction
o
DNA polymerase I synthesizes DNA in the 5׳
to 3׳ direction and DNA polymerase III synthesizes on lagging strands
Question 8 of 10
________ creates
fragments on the lagging strand.
o
DNA polymerase III
o
DNA gyrase
o
DNA polymerase II
o
DNA helicase
o
DNA polymerase I
What is the correct order
of DNA compaction in eukaryotes?
o
Helix, chromatin fiber, nucleosomes,
duplicated chromosome, condensation of chromatin
o
Condensation of chromatin, nucleosomes,
chromatin fiber, helix, duplicated chromosome
o
Chromatin fiber, condensation of
chromatin, duplicated chromosome, nucleosome, helix
o
Helix, nucleosome, chromatin fiber,
condensation of chromatin, duplicated chromosome
Question 10 of 10
An experiment started
with 15N15N DNA. After two generations in 14N medium, E. coli will have
o
25% 14N14N and 75% 15N15N
o
50% 14N14N and 50% 15N15N
o
75% 15N14N and 25% 14N14
o
50% 15N14N and 50% 14N14N
o
50% 15N14N and 50% 15N15N
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