Which of the Following Is a True Statement Regarding Pyrimidine

question 29

Multiple Choice

Which of the following is a true statement regarding pyrimidine biosynthesis in animals?

• A) PRPP and ATP are allosteric inhibitors.
• B) CTP is a feedback inhibitor.
• C) It is allosterically regulated at aspartate transcarbomoylase.
• D) UDP and UTP are feedback inhibitors of CPS-II.
• E) ACTase catalyzes the committed step in pyrimidine synthesis.

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Definitions:

Anthocerophyta

A division of non-vascular plants known as hornworts, characterized by a sporophyte that looks like a small horn growing from the gametophyte.

Lycopodiophyta

A division of vascular plants that includes the club mosses and their relatives, characterized by their primitive vascular systems and microphyll leaves.

Liverworts

A group of non-vascular plants belonging to the division Bryophyta, known for their liver-shaped leaves.

Sorus

In ferns, a cluster of spore-producing sporangia.