The Role of E

question 11

Multiple Choice

The role of E. coli plasmids in recombinant DNA work is to

• A) splice DNA strands together to form circular DNA molecules
• B) cleave double-stranded DNA molecules
• C) provide the restriction enzymes needed for repairing defective DNA
• D) serve as a host for a "foreign" gene

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Definitions:

Placenta

A vital organ that develops in the uterus during pregnancy, facilitating the exchange of nutrients, oxygen, and waste between mother and fetus.

Umbilical Cord

A tube that connects the fetus to the placenta.

Uterine Wall

The muscle layer of the uterus, which thickens during pregnancy in preparation for childbirth.

Spinal Cord

A long, thin, tubular structure composed of nervous tissue that extends from the brainstem to the lower back, serving as the principal pathway for neural signals between the brain and the rest of the body.