One of the most significant steps in the evolution of true cells from macromolecular assemblages was the evolution of:

a. electronegativity.
b. covalent bonding.
c. hydrogen bonding.
d. valence electrons.
e. molecular reproduction


e

Biology & Microbiology

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Which is not true of viruses?

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Which of the following is not potentially part

of a chromosome in eukaryotes? a. centromere. b. histone. c. sister chromatid. d. nucleosome e. all of these are part of a eukaryotic chromosome

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Papillomaviruses are transmitted by (aerosols/direct contact/secretions)

What will be an ideal response?

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Helicobacter pylori has been implicated as the causal agent of:

a. diarrhea. b. constipation. c. peptic ulcers. d. cardiovascular disease. e. kwashiorkor.

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