Purines and Pyrimidines Refer to the _____ of the DNA

question 8

Multiple Choice

Purines and pyrimidines refer to the _____ of the DNA molecules.

• A)nitrogenous bases
• B)sugar-phosphate backbone
• C)hydrogen bonds
• D)nucleus
• E)histones

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Definitions:

Regenerated

describes something that has been restored or replenished, often relating to natural processes or materials that have been recycled or renewed.

Phagocytosis

The process by which cells engulf and digest foreign particles or microorganisms, an essential part of the immune system.

Pinocytosis

The process whereby a cell engulfs large amounts of liquid.

Active Transport

The movement of molecules across a cell membrane from a region of lower concentration to one of higher concentration, requiring energy.