Why is chlorophyll green in colour?
a. It can reflect the green wavelength.
b. It cannot reflect the red wavelength.
c. It cannot reflect the green wavelength.
d. It can reflect the red wavelength.
Ans: a. It can reflect the green wavelength.
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A species that is confined to the limited area in which it evolved is:
a. endemic b. endangered c. threatened d. extinct e. exotic
A crucial step in the regulation of most bacterial genes occurs
A) at transcription initiation. B) during RNA splicing. C) during nuclear export of mRNA. D) when nonsense suppressors translate mRNAs.
Blood enters the kidney through ____ and
leaves the kidney through ____.
a. the renal vein; the renal artery b. the nephron; the renal capillary c. the renal artery; the renal vein d. the renal artery; the nephron e. none of these
In order for DNA molecules to undergo
recombination, a. they must be from the same species. b. their strands must separate as in replication. c. they must be cut and spliced at specific nucleotide sequences. d. one of the two DNA strands must be degraded. e. they must first be transcribed