A genomic library consists of fragments of all of the DNA:a
that occurs in one species.
b. contained in one chromosome.
c. that would be found in a typical cell of a particular organism.
d. in a recombinant gene.
e. that codes for functional enzymes in a typical cell of a particular organism.
C
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Choose the description below that best matches the current model of RNA polymerase holoenzyme.
A. A core enzyme composed of five sigma factors bound by a polypeptide chain. B. A core enzyme composed of five polypeptides bound by ribosomes. C. An open complex or "bubble" formed by DNA, mRNA, and RNA polymerase. D. A core enzyme composed of five polypeptides bound by a transcription factor.
The process by which bacteria and fungi break down
nitrogenous materials forming NH4+ is a. nitrification. b. ammonification. c. denitrification. d. nitrogen fixation. e. respiration.
Where are baroreceptors located?
a. in the brainstem b. in the walls of blood vessels c. in the adrenal glands d. in the heart
All of the following are characteristics of viruses exceptÂ
A. ultramicroscopic size. B. definite shape. C. ability to infect host cells. D. metabolism. E. genes.