USABO Open Exam 2025/2026 Exam
Questions with 100% Correct Answers |
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Sunflower chromosomes have been isolated and their DNA/NT analyzed. It
was found that chromosome 2 has unusually high content of Adenine
(40%). How many percent of Guanine is present in chromosome 2?
A. 10%
B. 20%
C. 30%
D. 40 %
E. 50% - 🧠 ANSWER ✔✔A. 10%
Sunflower chromosomes have been isolated and their DNA/NT analyzed. It
was found that chromosome 2 has unusually high content of Adenine
(40%). Assume that the entire sequence of the chromosome is transcribed.
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,Which of the following is true for the content of Adenine in the transcribed
RNA?
A. Adenine is 40% of the RNA.
B. Adenine is 20% of the RNA.
C. Adenine is at least 20% of the RNA.
D. Adenine is at least 40% of the RNA.
E. The content of Adenine is not possible to determine based on the
information provided. - 🧠 ANSWER ✔✔E. The content of Adenine is not
possible to determine based on the information provided.
Which of the following is a primary organ or structure of the immune
system?
A. Spleen
B. Thymus
C. Tonsils
D. Lymph nodes
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, E. Appendix - 🧠 ANSWER ✔✔B. Thymus
"Hairs" (such as trichomes) on the surface of leaves may limit:
A. photosynthesis.
B. intake of carbon dioxide.
C. evapotranspiration.
D. drought adaptations.
E. movement of water in the vessels. - 🧠 ANSWER ✔✔C.
evapotranspiration.
You discover a worm-like organism that inhabits soil samples that has the
following characteristics: segmented body and few bristle-like extensions.
To which one of the following groups will you assign this organism?
A. Cestoda
B. Polychaeta
C. Oligochatea
D. Onychophora
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
Questions with 100% Correct Answers |
Latest Update
Sunflower chromosomes have been isolated and their DNA/NT analyzed. It
was found that chromosome 2 has unusually high content of Adenine
(40%). How many percent of Guanine is present in chromosome 2?
A. 10%
B. 20%
C. 30%
D. 40 %
E. 50% - 🧠 ANSWER ✔✔A. 10%
Sunflower chromosomes have been isolated and their DNA/NT analyzed. It
was found that chromosome 2 has unusually high content of Adenine
(40%). Assume that the entire sequence of the chromosome is transcribed.
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
1
PRIVACY STATEMENT. ALL RIGHTS RESERVED
,Which of the following is true for the content of Adenine in the transcribed
RNA?
A. Adenine is 40% of the RNA.
B. Adenine is 20% of the RNA.
C. Adenine is at least 20% of the RNA.
D. Adenine is at least 40% of the RNA.
E. The content of Adenine is not possible to determine based on the
information provided. - 🧠 ANSWER ✔✔E. The content of Adenine is not
possible to determine based on the information provided.
Which of the following is a primary organ or structure of the immune
system?
A. Spleen
B. Thymus
C. Tonsils
D. Lymph nodes
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PRIVACY STATEMENT. ALL RIGHTS RESERVED
, E. Appendix - 🧠 ANSWER ✔✔B. Thymus
"Hairs" (such as trichomes) on the surface of leaves may limit:
A. photosynthesis.
B. intake of carbon dioxide.
C. evapotranspiration.
D. drought adaptations.
E. movement of water in the vessels. - 🧠 ANSWER ✔✔C.
evapotranspiration.
You discover a worm-like organism that inhabits soil samples that has the
following characteristics: segmented body and few bristle-like extensions.
To which one of the following groups will you assign this organism?
A. Cestoda
B. Polychaeta
C. Oligochatea
D. Onychophora
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
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