This byproduct of protein catabolism constitutes approximately one-half of all nitrogenous waste.

A. urea
B. creatinine
C. uric acid
D. azotemia
E. ammonia


Answer: A. urea

Anatomy & Physiology

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 If the DNA sequence ATGCTCAT was found to have the complimentary strand TACGGGTA, which of the following is possible?

A. There was an error during transcription where the incorrect codon on the tRNA molecule. B. The cell correctly copied the DNA strand during replication. C. There was an error during translation where the incorrect nucleotide was brought by the mRNA. D. There was an error during DNA replication.

Anatomy & Physiology

The motor cortex is activated by a widespread pattern of neuronal discharge, called the ____________________

Fill in the blank(s) with correct word

Anatomy & Physiology

In the kidneys, parathyroid hormone acts to ________ production of calcitriol and to ________ excretion of calcium in urine.

A. decrease; decrease B. decrease; increase C. increase; increase D. increase; decrease

Anatomy & Physiology

What is a mistake in replication called?

A. Triplet B. Mutation C. Codon D. Anticodon

Anatomy & Physiology