USABO Open Exam 2025/2026 Exam
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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. - 🧠 ANSWER ✔✔C. genetic engineering.
Isolated RNA molecules are generally less stable than DNA at
physiological pH because:
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,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. - 🧠 ANSWER ✔✔A. RNA has
ribose.
Which of the following molecules is able to cross the lipid bilayer?
A. antibodies
B. ATP
C. insulin
D. Na+
E. steroid hormones - 🧠 ANSWER ✔✔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?
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, A. 0.010 min
B. 0.346 min
C. 0.693 min
D. 1.000 min
E. 1.440 min - 🧠 ANSWER ✔✔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?
A. chlorophyll
B. cell membrane
C. differentiated cell types such as spores, vegetative cells, and
heterocysts
D. nucleoid region
E. nucleolus - 🧠 ANSWER ✔✔E. nucleolus
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Questions and Detailed Answers | Get it
100% Correct Answers
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. - 🧠 ANSWER ✔✔C. genetic engineering.
Isolated RNA molecules are generally less stable than DNA at
physiological pH because:
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
1
PRIVACY STATEMENT. ALL RIGHTS RESERVED
,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. - 🧠 ANSWER ✔✔A. RNA has
ribose.
Which of the following molecules is able to cross the lipid bilayer?
A. antibodies
B. ATP
C. insulin
D. Na+
E. steroid hormones - 🧠 ANSWER ✔✔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?
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
, A. 0.010 min
B. 0.346 min
C. 0.693 min
D. 1.000 min
E. 1.440 min - 🧠 ANSWER ✔✔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?
A. chlorophyll
B. cell membrane
C. differentiated cell types such as spores, vegetative cells, and
heterocysts
D. nucleoid region
E. nucleolus - 🧠 ANSWER ✔✔E. nucleolus
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
