Why Is DNA Damage in Skin Cells from Exposure to Excessive

question 57

Multiple Choice

Why is DNA damage in skin cells from exposure to excessive UV light not completely reversed by photoreactivation?

• A)DNA photolyase in humans is activated only under conditions of heat shock.
• B)Humans lack a photoreactivation repair mechanism.
• C)The presence of histones greatly slows photoreactivation,thus humans depends primarily on other forms of DNA repair.
• D)Photoreactivation is specific for the removal of thymine dimers.Thymine dimers do not form in human DNA.

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Definitions:

Moreland And Levine's Theory

A model detailing the processes through which individuals join groups, become integrated into them, and eventually leave them, highlighting the stages of exploration, assimilation, and exit.

Commitment

The state or quality of being dedicated to a cause, activity, or organization, often reflected in a willingness to give time and energy to it.

Role Ambiguity

The uncertainty or lack of clarity surrounding the expectations, responsibilities, or duties of a particular role within an organization or group.

Tension

The state of being stretched tight or the mental or emotional strain a person may feel under pressure.