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Insulin injected by diabetics to control blood sugar levels is
derived from bacteria whose DNA has been modified by the
addition of the human gene for insulin, which is then
produced by the prokaryotes. This is an example of:
A. acid therapy.
B. cloning.
C. genetic engineering.
D. gene therapy.
E. pluripotency. - Correct Answers ✅C. genetic
engineering.
Isolated RNA molecules are generally less stable than DNA at
physiological pH because:
A. RNA has ribose.
B. RNU is always linear.
C. RNA has U instead of T.
D. RNA is usually single stranded.
E. there are many more RNAse enzymes. - Correct Answers
✅A. RNA has ribose.
Which of the following molecules is able to cross the lipid
bilayer?
,USABO Open Questions and Verified
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A. antibodies
B. ATP
C. insulin
D. Na+
E. steroid hormones - Correct Answers ✅E. steroid
hormones
If the rate constant of a first order reaction that converts
substrate S into product P is 0.693 min -1 then what is the
half life of the reaction?
A. 0.010 min
B. 0.346 min
C. 0.693 min
D. 1.000 min
E. 1.440 min - Correct Answers ✅D. 1.000 min
The local swimming pool is contaminated with an organism
that is causing "swimmers itch." You think you have identified
cyanobacteria in your sample. Which features would you
expect this organism to LACK?
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A. chlorophyll
B. cell membrane
C. differentiated cell types such as spores, vegetative cells,
and heterocysts
D. nucleoid region
E. nucleolus - Correct Answers ✅E. nucleolus
Suppose radioactive thymine was added to an actively
dividing culture of E.coli bacteria. What would happen if a cell
replicated once in the presence of this radioactive base?
A. one of the daughter cells, but not the other, would have
radioactive DNA
B. neither of the two daughter cells would be radioactive
C. all four bases of the DNA would be radioactive
D. radioactive thymine would pair with nonradioactive
guanine
E. DNA in both daughter cells would be radioactive - Correct
Answers ✅E. DNA in both daughter cells would be
radioactive
If radioactive sulfur ( 35 S) is used in the culture medium of
bacteria that harbor bacteriophage viruses, it will later
appear in:
Answers, 100% Score Guarantee Pass
(Latest 2025)
Insulin injected by diabetics to control blood sugar levels is
derived from bacteria whose DNA has been modified by the
addition of the human gene for insulin, which is then
produced by the prokaryotes. This is an example of:
A. acid therapy.
B. cloning.
C. genetic engineering.
D. gene therapy.
E. pluripotency. - Correct Answers ✅C. genetic
engineering.
Isolated RNA molecules are generally less stable than DNA at
physiological pH because:
A. RNA has ribose.
B. RNU is always linear.
C. RNA has U instead of T.
D. RNA is usually single stranded.
E. there are many more RNAse enzymes. - Correct Answers
✅A. RNA has ribose.
Which of the following molecules is able to cross the lipid
bilayer?
,USABO Open Questions and Verified
Answers, 100% Score Guarantee Pass
(Latest 2025)
A. antibodies
B. ATP
C. insulin
D. Na+
E. steroid hormones - Correct Answers ✅E. steroid
hormones
If the rate constant of a first order reaction that converts
substrate S into product P is 0.693 min -1 then what is the
half life of the reaction?
A. 0.010 min
B. 0.346 min
C. 0.693 min
D. 1.000 min
E. 1.440 min - Correct Answers ✅D. 1.000 min
The local swimming pool is contaminated with an organism
that is causing "swimmers itch." You think you have identified
cyanobacteria in your sample. Which features would you
expect this organism to LACK?
, USABO Open Questions and Verified
Answers, 100% Score Guarantee Pass
(Latest 2025)
A. chlorophyll
B. cell membrane
C. differentiated cell types such as spores, vegetative cells,
and heterocysts
D. nucleoid region
E. nucleolus - Correct Answers ✅E. nucleolus
Suppose radioactive thymine was added to an actively
dividing culture of E.coli bacteria. What would happen if a cell
replicated once in the presence of this radioactive base?
A. one of the daughter cells, but not the other, would have
radioactive DNA
B. neither of the two daughter cells would be radioactive
C. all four bases of the DNA would be radioactive
D. radioactive thymine would pair with nonradioactive
guanine
E. DNA in both daughter cells would be radioactive - Correct
Answers ✅E. DNA in both daughter cells would be
radioactive
If radioactive sulfur ( 35 S) is used in the culture medium of
bacteria that harbor bacteriophage viruses, it will later
appear in:
