Which of the following is a structural feature of DNA but not RNA?
A) Single-stranded
B) Containing the nitrogenous base adenine
C) Containing phosphate groups
D) Containing deoxyribose sugars
E) Containing the nitrogenous base uracil
D
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The primary pacemaker of the heart is the
(a) bicuspid valve. (b) tricuspid valve. (c) aorta. (d) sinoatrial node.
Various forms that a single gene can take at a given locus are called
a. kinetochores. b. alleles. c. autosomes. d. loci. e. chromatids.
During the menstrual cycle, ovulation is triggered by a surge in FSH. Indicate whether the statement is true or false
Polypeptide antibiotics that act as detergents and distort bacterial cellular membranes do so by:
A) acting as antimetabolites B) inhibiting cell wall synthesis C) disrupting cell membrane function D) inhibiting nucleic acid synthesis