In Thtechniquof Artificial Twinning

question 75

Multiple Choice

In thtechniquof artificial twinning,

• A)two zygotes are used.
• B)two parts of a tiny ball of cells splits.
• C)zygotes produced by in vitro fertilization are placed into a surrogate to begin division.
• D)no sperm is needed.
• E)all of these are true.

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Definitions:

Ionized

The state of an atom or molecule when it has lost or gained one or more electrons, thus carrying a charge.

Phosphorylation

Reaction in which a phosphate group is added to a molecule.

Gated Transporters

Membrane proteins that regulate the passage of substances in and out of cells or organelles, operating gates that open or close in response to specific signals.

Concentration Gradient

A variation in the concentration of a substance across a distance, often leading to diffusion from an area of higher concentration to one of lower concentration.