Which of the Following Best Explains the Observation That in Bacteria

question 35

Multiple Choice

Which of the following best explains the observation that in bacteria, there are 61 mRNA codons that specify an amino acid, but only 45 tRNAs?

• A) Some tRNAs have anticodons that recognize four or more different codons.
• B) The rules for base pairing between the third base of a codon and tRNA are flexible.
• C) Many codons are never used, so the tRNAs that recognize them are dispensable.
• D) The DNA codes 61 tRNAs, but some are destroyed after transcription.

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Definitions:

Uterus

A major female reproductive organ in many animals, including humans, where offspring are conceived and in which they gestate before birth.

Cervix

The lower part of the uterus in the female reproductive system, connecting the uterus to the vagina.

Pap Smear

A screening test for cervical cancer involving the collection of cells from a woman's cervix to detect abnormalities that may indicate precancerous or cancerous conditions.

Common Site

A location or platform shared or widely used by a large number of individuals or entities for a particular purpose or activity.