The substance that an enzyme combines with is

a. another enzyme.
b. a product.
c. an active site.
d. the substrate.


b

Biology & Microbiology

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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

Biology & Microbiology

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

Biology & Microbiology

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

Biology & Microbiology

In translation, a cytosine in tRNA pairs opposite 

A. uracil. B. guanine. C. thymine. D. adenine.

Biology & Microbiology