Restriction Enzymes

question 18

Multiple Choice

Restriction enzymes:

• A) act at the membrane to restrict the passage of certain molecules into the cell.
• B) are highly specialized ribonucleases that degrade mRNA soon after its synthesis.
• C) are sequence-specific DNA endonucleases.
• D) are very specific proteases that cleave peptides at only certain sequences.
• E) catalyze the addition of a certain amino acid to a specific tRNA.

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Definitions:

Progesterone

A hormone released by the ovaries involved in the menstrual cycle, pregnancy, and embryogenesis.

Mature Follicle

Ovarian follicle in which the oocyte attains its full size. The follicle contains a fluid-filled antrum and is surrounded by the theca interna and externa; also called Graafian follicle.

Meiotic Division

A type of cell division that reduces the chromosome number by half, resulting in the production of four genetically diverse haploid cells, critical for sexual reproduction.

Mature Follicle

A fully developed ovarian follicle that is ready to release an egg during ovulation in the female reproductive cycle.