The Average Number of Calories and Amount of Sugar and Fat

question 87

Multiple Choice

The average number of calories and amount of sugar and fat consumed by Americans __________.

• A) sharply increased after 1970
• B) is lower today than it was in 1980
• C) has slowly decreased since the turn of the twenty-first century
• D) fell steadily in the late twentieth and early twenty-first centuries

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Definitions:

Transcription

The process of copying a segment of DNA into RNA.

RNA Polymerases

Enzymes that synthesize RNA molecules from a DNA template during the process of transcription, key to gene expression.

Translation

The biological process of synthesizing proteins from messenger RNA sequences in the ribosomes.

tRNA Triplet

A trio of nucleotides in transfer RNA that matches a complementary codon in messenger RNA during the formation of proteins.