Covalent Bonds Joining Two Nucleotides Within a Single Strand of DNA

question 80

Multiple Choice

Covalent bonds joining two nucleotides within a single strand of DNA form between:

• A)a phosphate group and adenine.
• B)deoxyribose and a phosphate group.
• C)adenine and thymine.
• D)the phosphate groups of both.
• E)ribose and a base.

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Definitions:

Sleep-wake Cycles

The natural, circadian rhythm that regulates when we are awake and when we sleep, typically repeating every 24 hours.

Light Perception

The ability to see light and differentiate between its intensity and direction, a fundamental aspect of vision.

Circadian Rhythms

Biological processes that occur on a roughly 24-hour cycle, influencing sleep, wakefulness, and various bodily functions.

Pineal Gland

A small endocrine gland in the brain that produces melatonin, a hormone that regulates sleep patterns.