If strains 1 and 2 conjugate and are plated on minimal medium, cells growing on the minimal medium will have the
genotype ____.
a. bio- met- thr- leu+
b. bio+ met+ thr+ leu+
c. bio+ met- thr- leu+
d. bio+ met+ thr- leu+
e. bio- met- thr- leu-
ANSWER: b
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The RNA molecules that carry amino acids to the ribosomes during protein synthesis are called ________.
A. ribozymes B. ribosomal RNA C. transfer RNA D. messenger RNA E. primer RNA
Which is the predominant life cycle phase of the Moon Jellyfish seen here?
Which statement best describes the mechanism of neutralization?
A) Antigens clump together and are more susceptible to phagocytosis. B) Cells are neutralized by toxins injected by natural killer cells. C) It causes pathogenic cells to lyse. D) An antibody blocks an antigen's activity by binding to it. E) Pathogens are bound by antibodies and are more susceptible to phagocytosis.
NAD carries ____ to the electron transport system.
A. energy B. oxygen C. hydrogen electrons D. water