A protein is 300 amino acids long. Which of the following could be the number of total nucleotides in the section of DNA that codes for this protein? (Remember: DNA is double-stranded.)
A) 300 B) 1800 C) 100 D) 3 E) 900
Answer: B
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Which of the following is not a part of the type II topoisomerase mechanism?
A. The enzyme breaks two strands, each one forming an enzyme-linked intermediate through tyrosines in the active site. B. The double-stranded segment of DNA that passes through the break is released through the C-gate. C. ATP binding and hydrolysis are required for creating the double-stranded break. D. ATP hydrolysis is coupled to the passage of the unbroken double-stranded DNA segment through the break. E. The religated strand stays associated with the topoisomerase as it resets for another round of catalysis.
Since hormones are present in such small amounts, how can their signals be amplified enough to
regulate so many physiological processes? What will be an ideal response?
In which PO2 environment would hemoglobin most easily release its O2?
A. 65 mmHg B. 100 mmHg C. 75 mmHg D. 90 mmHg E. 40 mmHg
Your mother has albinism, which is a recessive trait. Your father has cystic fibrosis, which is also a
recessive trait. You just got married and discover that your new father-in-law has albinism and cystic fibrosis. What are the odds that your first child will have both albinism and cystic fibrosis?
a. 1/16. b. 1/8. c. 1/4. d. 1/2. e. 0.