The modified amino acid f-Met is essential for
A. bacterial translation.
B. bacterial transcription.
C. eukaryotic transcription.
D. eukaryotic translation.
E. eukaryotic mRNA processing.
Answer: A
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Fluorescent antibodies can be used to separate mixtures of cells into relatively pure populations with a fluorescence cytometer
Indicate whether the statement is true or false.
Which of the following occurs when allolactose levels increase in E. coli?
A. Transcription of genes within the lac operon increases. B. Transcription of genes within the lac operon decreases. C. Transcription of genes within the lac operon does not change. D. E. coli cells replicate rapidly. E. The tryptophan operon becomes more active.
Gram-positive bacteria have a thinner layer of peptidoglycan than gram-negative bacteria.
Answer the following statement true (T) or false (F)
Which of the following is used during the
fight-or-flight response? a. sympathetic nervous system b. parasympathetic nervous system c. norepinephrine d. sympathetic nervous system and norepinephrine e. parasympathetic nervous system and norepinephrine