Scientists suspect that the first macromolecules to form when cells first arose were
A. enzymes.
B. RNA.
C. DNA.
D. polysaccharides.
Answer: B
Biology & Microbiology
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In which stage of meiosis do homologous chromosomes separate from each other?
A. metaphase II B. interkinesis C. anaphase I D. anaphase II E. metaphase I
Biology & Microbiology
In ? phage, which protein, the product of the cI gene, blocks the transcription required to initiate the lytic cycle?
A) cro B) repressor C) enhancer D) integrase E) operator
Biology & Microbiology
What type of growth does a plant exhibit when its trunk gets thicker?
A) primary B) secondary C) tertiary D) determinate
Biology & Microbiology
Many poisonous snakes share warning colors of red, yellow, and black. This is an example of:
a. Batesian mimicry. b. mutualism. c. camouflage. d. Müllerian mimicry. e. character displacement.
Biology & Microbiology