BIOL 3060 Final Prep Questions Exam With
Complete Answers
Which of these are found at a replication fork? Please select all that apply.
Telomerase
Single-stranded DNA
Double-stranded DNA
DNA polymerase
DNA helicase - ANSWER Single-stranded DNA
Double-stranded DNA
DNA polymerase
DNA helicase
What is the function of primase? - ANSWER To synthesize RNA
What are Okasaki fragments? - ANSWER DNA pieces made on the lagging strand
What do reverse transcriptases do? - ANSWER Copy RNA into DNA
How do bacteria determine which is the newly-synthesized DNA strand during mismatch
repair? - ANSWER The old DNA strand is methylated
,The 5' carbon of the molecule shown below is located near:
A is the carbon in HOCH2 outside the ring, each of the letters following wrap around
with F being the O in the ring. - ANSWER A
The nitrogenous base in the molecule shown below is a:
The nitrogenous base is double ringed - ANSWER Purine
The molecule shown below would be used by:
The molecule has three phosphate groups, a sugar, and hexagonal thing - ANSWER RNA
Polymerase
Which statement about complementary base pairing is not true?
Purines pair with purines, and pyrimidines pair with pyrimidines
Complementary base pairing plays a role in DNA replication
In DNA, T pairs with A
Pyrimidine pairs with a purine
In RNA, C pairs with G - ANSWER Purines pair with purines, and pyrimidines pair with
pyrimidines
Which of the following is not a difference between RNA and DNA?
RNA has uracil; DNA has thymine
,RNA has ribose; DNA has deoxyribose
RNA has five bases; DNA has four
RNA is single polynucleotide strand; DNA is a double strand
RNA molecules are smaller than human chromosomal DNA molecules - ANSWER RNA
has five bases; DNA has four
Working on the Amazon River, a biologist isolated DNA from two unknown organisms, P
and Q. She discovered that the adenine content of P was 15% and the cytosine content
of Q was 42%. This means that for organism P.
The amount of guanine is 15%
The amount of guanine and cytosine combined is 70%
The amount of thymine is 21%
The amount of adenine and thymine combined is 18% - ANSWER The amount of
guanine and cytosine combined is 70%
Working on the Amazon River, a biologist isolated DNA from two unknown organisms, P
and Q. She discovered that the adenine content of P was 15% and the cytosine content
of Q was 42%. This means that for organism Q:
The amount of guanine is 21%
The amount of adenine 8%
The amount of guanine and cytosine combined 70%
The amount of adenine and thymine combined 42% - ANSWER The amount of adenine
8%
, Pyrimidines built from a single carbon ring include: - ANSWER Cytosine and thymine
You discover new alien DNA as you examine meteorite samples collected in space. Each
nucleotide pair of this new form of the DNA double helix weighs about 0.01 g. The
sample contains approximately 0.25 g of DNA. This means there are 25 nucleotide pairs
in this sample. You see that the DNA is structured in a similar conformation to A-DNA
seen in humans (alien DNA shown in the image below). If you were to stretch out all the
DNA in this sample, how long would it be?
Image just says "A form: Every turn is 11bp, and 2.4 nm in length" - ANSWER 5.45
Fredrich Miescher isolated nuclein (known now as nucleic acids) from _______ samples he
collected from a nearby clinic. - ANSWER Pus
Who determined the rule that (A+G)/(C+T) =1? - ANSWER Erwin Chargaff
One of the strongest lines of evidence for the bacteria origin of mitochondria (the
endosymbiotic theory) is that mitochondria are entirely self-sufficient. They can be
grown and maintained with relative ease outside of eukaryotic cells. - ANSWER False
Imagine studying two sets of nucleosomes. In the first set, there is only 147 bp of DNA
tightly associated with the histone proteins of the nucleosome core. In the second set of
nucleosomes, there is about 167 bp of DNA associated with the histone proteins of the
nucleosome core. The most likely explanation of this difference is: - ANSWER histone H1
is present in the second set of nucleosomes, but absent from the first set
Complete Answers
Which of these are found at a replication fork? Please select all that apply.
Telomerase
Single-stranded DNA
Double-stranded DNA
DNA polymerase
DNA helicase - ANSWER Single-stranded DNA
Double-stranded DNA
DNA polymerase
DNA helicase
What is the function of primase? - ANSWER To synthesize RNA
What are Okasaki fragments? - ANSWER DNA pieces made on the lagging strand
What do reverse transcriptases do? - ANSWER Copy RNA into DNA
How do bacteria determine which is the newly-synthesized DNA strand during mismatch
repair? - ANSWER The old DNA strand is methylated
,The 5' carbon of the molecule shown below is located near:
A is the carbon in HOCH2 outside the ring, each of the letters following wrap around
with F being the O in the ring. - ANSWER A
The nitrogenous base in the molecule shown below is a:
The nitrogenous base is double ringed - ANSWER Purine
The molecule shown below would be used by:
The molecule has three phosphate groups, a sugar, and hexagonal thing - ANSWER RNA
Polymerase
Which statement about complementary base pairing is not true?
Purines pair with purines, and pyrimidines pair with pyrimidines
Complementary base pairing plays a role in DNA replication
In DNA, T pairs with A
Pyrimidine pairs with a purine
In RNA, C pairs with G - ANSWER Purines pair with purines, and pyrimidines pair with
pyrimidines
Which of the following is not a difference between RNA and DNA?
RNA has uracil; DNA has thymine
,RNA has ribose; DNA has deoxyribose
RNA has five bases; DNA has four
RNA is single polynucleotide strand; DNA is a double strand
RNA molecules are smaller than human chromosomal DNA molecules - ANSWER RNA
has five bases; DNA has four
Working on the Amazon River, a biologist isolated DNA from two unknown organisms, P
and Q. She discovered that the adenine content of P was 15% and the cytosine content
of Q was 42%. This means that for organism P.
The amount of guanine is 15%
The amount of guanine and cytosine combined is 70%
The amount of thymine is 21%
The amount of adenine and thymine combined is 18% - ANSWER The amount of
guanine and cytosine combined is 70%
Working on the Amazon River, a biologist isolated DNA from two unknown organisms, P
and Q. She discovered that the adenine content of P was 15% and the cytosine content
of Q was 42%. This means that for organism Q:
The amount of guanine is 21%
The amount of adenine 8%
The amount of guanine and cytosine combined 70%
The amount of adenine and thymine combined 42% - ANSWER The amount of adenine
8%
, Pyrimidines built from a single carbon ring include: - ANSWER Cytosine and thymine
You discover new alien DNA as you examine meteorite samples collected in space. Each
nucleotide pair of this new form of the DNA double helix weighs about 0.01 g. The
sample contains approximately 0.25 g of DNA. This means there are 25 nucleotide pairs
in this sample. You see that the DNA is structured in a similar conformation to A-DNA
seen in humans (alien DNA shown in the image below). If you were to stretch out all the
DNA in this sample, how long would it be?
Image just says "A form: Every turn is 11bp, and 2.4 nm in length" - ANSWER 5.45
Fredrich Miescher isolated nuclein (known now as nucleic acids) from _______ samples he
collected from a nearby clinic. - ANSWER Pus
Who determined the rule that (A+G)/(C+T) =1? - ANSWER Erwin Chargaff
One of the strongest lines of evidence for the bacteria origin of mitochondria (the
endosymbiotic theory) is that mitochondria are entirely self-sufficient. They can be
grown and maintained with relative ease outside of eukaryotic cells. - ANSWER False
Imagine studying two sets of nucleosomes. In the first set, there is only 147 bp of DNA
tightly associated with the histone proteins of the nucleosome core. In the second set of
nucleosomes, there is about 167 bp of DNA associated with the histone proteins of the
nucleosome core. The most likely explanation of this difference is: - ANSWER histone H1
is present in the second set of nucleosomes, but absent from the first set
