All of the Following Occur at or in the Brush

question 10

Multiple Choice

All of the following occur at or in the brush border (microvilli) of intestinal mucosal cells EXCEPT which one?

• A) Na⁺-driven cotransport of amino acids.
• B) Na⁺-driven cotransport of fatty acids.
• C) Na⁺-driven cotransport of glucose.
• D) conversion of dipeptides to amino acids.
• E) uptake of monoglycerides.

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Definitions:

Anticodons

Sequences of three nucleotides on transfer RNA molecules that are complementary to codons on messenger RNA and ensure the correct amino acids are added during protein synthesis.

Base-pairing Bonds

The hydrogen bonds between complementary nucleotides (adenine with thymine or uracil, and cytosine with guanine) in DNA or RNA.

Transcription

The process of copying a segment of DNA into RNA by the enzyme RNA polymerase.

Eukaryotes

Eukaryotes are organisms whose cells have a nucleus enclosed within a nuclear envelope, distinguishing them from prokaryotes.