The Cortical Reaction of Sea Urchin Eggs Functions Directly in

question 72

Multiple Choice

The cortical reaction of sea urchin eggs functions directly in

• A) the formation of a fertilization envelope.
• B) the production of a fast block to polyspermy.
• C) the release of hydrolytic enzymes from the sperm.
• D) the generation of an electrical impulse by the egg.
• E) the fusion of egg and sperm nuclei.

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Definitions:

Cytosine

Cytosine is one of the four main bases found in DNA and RNA, pairing with guanine in the genetic code.

Guanine

One of the four main nucleobases found in the nucleic acids DNA and RNA, which pairs with cytosine.

Adenine

One of the four nucleobase molecules in the nucleic acids of DNA and RNA, paired with thymine in DNA and uracil in RNA.

Rod-Shaped

Describes an object or organism having a long, narrow, cylindrical form, similar to a rod or stick.