Which of the Following Is True of Purines

question 7

Multiple Choice

Which of the following is true of purines?

• A)Adenine's bonding to thymine is stronger than is guanine's to cytosine.
• B)Cytosine is a purine.
• C)Purines have a double- ringed structure.
• D)Purines bind readily to deoxyribose, but not ribose.
• E)Both adenine and thymine are purines.

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Definitions:

Germinal Stage

The initial two weeks of prenatal development after conception, characterized by rapid cell division and the beginning of cell differentiation.

Embryonic Stage

A critical phase of early development in multicellular organisms, during which the embryo forms and differentiates into specific cell types and structures.

Placental Stage

The third and final stage of childbirth, involving the delivery of the placenta after the baby is born.

Perinatal Period

The phase surrounding childbirth, typically considered to be from the last few weeks of pregnancy to one to four weeks after birth.