What Is a Distinguishing Characteristic Between Class I and Class

question 27

Multiple Choice

What is a distinguishing characteristic between Class I and Class II aminoacyl-tRNA synthetases?

• A) Class I enzymes are ligases, while Class II enzymes are lyases.
• B) Class I enzymes have proofreading, while Class II enzymes do not.
• C) Class I enzymes bind to specific nucleotides in tRNA substrates, while Class II enzymes do not.
• D) Class I enzymes transfer amino acids to the 2´ OH, while Class II enzymes transfer amino acids to the 3´ OH.
• E) None of the answers is correct.

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Definitions:

Elastic Cartilage

A type of cartilage that is highly flexible and contains more elastic fibers than other types of cartilage, found in structures like the ear.

Muscle Tissue

A type of body tissue that contracts to produce movement and is classified into skeletal, cardiac, and smooth types.

Nerve Tissue

Specialized tissue forming the nervous system, responsible for transmitting signals between different parts of the body.

Serous Glands

Glands that produce and secrete serous fluid, a clear, watery fluid that lubricates body cavities and organs.