A Temporary Change in the Conformation of a Nitrogenous Base

question 49

Multiple Choice

A temporary change in the conformation of a nitrogenous base is called ________.

• A) Depurination
• B) A tautomeric shift
• C) Deamination
• D) None of the answers are correct

---

Definitions:

Abyssal Zone

A deep-sea environment located at depths of 4,000 to 6,000 meters, characterized by high pressure, low temperatures, and complete darkness.

Benthic Zone

The ecological region at the lowest level of a body of water such as an ocean or a lake, including the sediment surface and sub-surface layers.

Littoral Zone

The shallow nearshore area of a body of water, where sunlight can reach the bottom, supporting diverse aquatic plants and animals.

Limnetic Zone

The open surface waters in a freshwater habitat, away from the shore, where there is enough light penetration to support photosynthesis.