The discovery that some bacteria ____ using enzymes that cut the viral DNA into pieces was one of the first steps in
the development of recombinant DNA technology.
a. exchange fused plasmid DNA
b. restrict important nutrients from leaving the bacterial cell
c. resist viral infection
d. cut up and recycle mRNA transcripts
e. attach amino acids to tRNA molecules
c
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RNA viruses require their own supply of certain enzymes because _____
A) host cells rapidly destroy the viruses B) host cells lack enzymes that can replicate the viral genome C) these enzymes translate viral mRNA into proteins D) these enzymes penetrate host cell membranes E) these enzymes cannot be made in host cells
Which of the following bacterial diseases is not transmitted by a tick?
A) Lyme disease B) Rocky Mountain spotted fever C) plague D) tularemia
Recent research has demonstrated a correlation between the presence of certain types of Gram-positive bacteria in the human gut with obesity and type 2 diabetes. These findings best support which of the following statements?
A. The presence of Gram-positive bacteria in the human gut causes obesity and type 2 diabetes. B. Gram-positive bacteria compose the majority of normal microbiota in the human gut of people with obesity and type 2 diabetes. C. Obesity and type 2 diabetes is caused by normal microbiota in the human gut. D. Normal microbiota may significantly impact human health and disease.
In the reaction: C4H6O4 + FAD ?C4H4O4 + FADH2, what type of reaction took place to remove the protons from C4H6O4?
A. Reduction B. Oxidation C. Dehydrogenation D. Decarboxylation