CDKs are important in the regulation of the cell cycle. They carry out their function by ______

A. adding phosphate groups to target proteins
B. degrading cyclin proteins
C. preventing the progression of a cell from
one stage of the cell cycle to the next


A

Biology & Microbiology

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Xeroderma pigmentosum is caused by

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Which hormones are secreted by the adrenal cortex, and regulate carbohydrate, protein, and fat metabolism?

A. Mineralocorticoids
B. Gonadocorticoids
C. Corticosteroids
D. Glucocorticoids

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All of the following are true of the polymerase chain reaction (PCR) except:

A. A heat-stable DNA polymerase is used in the reaction process. B. Short pieces of DNA called primers are added to the reaction mixtures. C. Large amounts of DNA must be isolated from the source organism. D. Billions of copies of a DNA sequence are made in a few hours. E. An automated thermocycler is used to heat and cool the reaction samples

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What type of skeleton is found in annelids?

A) dermal skeleton B) endoskeleton C) exoskeleton D) notochords E) hydrostatic skeleton

Biology & Microbiology