Which two organisms should be used to determine the validity of the nitrate reduction test?
a. Ochrobactrum and Alcaligenes
b. Psychrobacter and Rhizobium
c. CDC group Ic and CDC group O-3
d. CDC group OFBA-1c and Shewanella
C
The only two organisms that are positive and negative for nitrate reduction are CDC group Ic and CDC group O-3, respectively.
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In a nucleotide, the sugar is bonded to a
A. sugar. B. codon. C. salt. D. base and phosphate.
Nucleases are enzymes that degrade mRNA. In order for nuclease to overcome the inherent protections in mRNA that prevent its degradation, nucleases must use (Select all that apply.)A) 5' decapping enzymes.B) A and U sites that promote removal of the poly A tails.C) C and G recognition sites that activate removal of poly A tails.D) 3' end recognition sites that initiate quick degradation.E) 3' cap and poly A tail sites that activate degradation.
What will be an ideal response?
Which method would be the MOST powerful approach to isolating a single mutant from a population of billions?
a. assay for the loss of function b. replica plating c. selection for a gain of function d. screen for the mutant
Chickenpox is caused by a poxvirus.
Answer the following statement true (T) or false (F)