There are ________ common amino acids used to synthesize proteins.
A. 25
B. 64
C. 61
D. 20
Answer: D
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A researcher exposes a nonvirulent strain of Streptococcus pneumoniae to heat-killed cells of a virulent strain. After
exposure, the bacterial cells will be ____.
a. transduced b. artificially transformed c. transformed d. nonvirulent e. conjugated
The Calvin cycle requires all of the following molecules EXCEPT
a. NADPH. b. ATP. c. CO2. d. rubisco. e. glucose.
In eukaryotic cells,
a. the bulk of the control of gene expression is at the level of transcription just like in prokaryotes b. mRNAs tend to remain stable for about the same length of time c. mRNAs can have their activities altered through modifications such as phosphorylation d. promoters of genes that are transcribed remain part of heterochromatin e. genes that are involved in similar processes are clustered together in operons
Bioventing is a scientific technology that uses microorganisms to break down components of fuels in groundwater. Bioventing is an example of
A) genetic engineering. B) bioremediation. C) algae harvesting. D) bacteria culturing.