USABO Open Exam Questions And Answers

USABO Open Exam Questions And Answers.
Question 1: 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%
CORRECT ANSWER: A. 10%
Question 2: 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. 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.

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