The substance that an enzyme combines with is
a. another enzyme.
b. a product.
c. an active site.
d. the substrate.
b
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The promoter of a gene is the part of a gene where RNA polymerase and transcription factors bind, marking the ________.
A) end point of transcription B) start point of transcription C) end point of translation D) start point of translation
In a vertebrate with a four-chambered heart, the structure(s) containing blood with the highest O2 concentration is/are the _______________.
A. pulmonary arteries B. pulmonary veins C. right atrium D. inferior vena cava E. right ventricle
Which type of somatic receptor detects touch and pressure in the skin?
a. Melanocytes b. Hair and hair follicle c. Glands of skin d.Cutaneous receptors
In translation, a cytosine in tRNA pairs opposite
A. uracil. B. guanine. C. thymine. D. adenine.