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BIOS 260 Final Exam with Verified Solutions 100% Solved
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BIOS 260 Final Exam with Verified Solutions 100% Solved
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BIOS 260 Final Exam with Verified Solutions 100%Solved
Frederick Griffith conducted the first experiments suggesting that bacteria are capable of
transferring genetic information by performing the following_________? Correct Ans-
Mixing heat-killed smooth-bacteria and their remains with live rough-strain bacteria
Avery, Macleod, and McCarty expanded on Griffith's experiment to prove that DNA is the
hereditary molecule required for transformation. What treatment of the heat-killed smooth-
type bacteria extract resulted no transformation of the rough-bacteria to smooth-type
bacteria? Correct Ans-Destroying smooth-type bacteria extract with DNase
Hershey and Chase used radioactive phosphorus to label which of the macromolecules in the
bacteriophage used in their seminal experiments? Correct Ans-DNA
Hershey and Chase used radioactive sulfur to label which of the macromolecules in the
bacteriophage used in their seminal experiments? Correct Ans-Protein
The key experiment (conducted by Dr. Rosalind Franklin) that Watson and Crick used to
formulate their double helix model of the structure of DNA was__________. Correct Ans-
X-ray crystallography of DNA
, BIOS 260 Final Exam with Verified Solutions 100%
Solved
During replication, the direction of synthesis of new DNA from the leading and lagging strands
is____________. Correct Ans-5' to 3' only
Where does the initiator protein bind DNA at the start of replication? Correct Ans-At an
origin of replication (ORI)
After removal of the RNA primes and the replacement with DNA nucleotides, the single-
stranded nick adjacent to Okazaki fragments is filled in through a reaction that involves which
enzyme? Correct Ans-DNA ligase
Which enzyme elongates the new DNA strand starting at an RNA primer? Correct Ans-DNA
polymerase 3
Which of the following are the two purine nucleotides in DNA? Correct Ans-Adenine and
Guanine
, BIOS 260 Final Exam with Verified Solutions 100%
Solved
Complementary base pairing allows for______________. Correct Ans-DNA to serve as its
own template for replication
If there is 24% guanine in a DNA molecule, then there is __________ thymine Correct Ans-
26%
Recombinant and synthetic human insulin was first produced in which of the following model
genetic organisms?
-Mus Musculus
-Homo sapiens
-Arabidopsis thaliana
-Escherichia coli
-Saccharomyces cervisiae Correct Ans-Escherichia coli
Cytochrome C is a mitochondrial protein that is found in every eukaryotic organism. Why does
alignment of the amino acid sequences from evolutionarily diverse species for this protein
reveal relatively little change:
, BIOS 260 Final Exam with Verified Solutions 100%
Solved
-It is not found in every eukaryotic organism
-Bacteria do not have this protein
-the gene coding for this protein has changed extensively over time
-it is a relatively unimportant protein for eukaryotic function
-it is an essential protein in metabolism of all organisms Correct Ans-it is an essential
protein in metabolism of all organisms
The field of genetics known as ____________ genetics involves studying the structure and
function of genes at the molecular level. Correct Ans-Molecular
How many nucleotide base pairs are in the human genome? Correct Ans-3 billion
The Pax6 gene is found in both humans and fruit flies. Mutations in the gene both result in
eye malformations. This is an example of___________ evolution. Correct Ans-Convergent
In their famous experiment, which of the following would Meselson and Stahl have observed
after one cycle of replication in 14N medium if DNA replication was conservative? Correct
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