The SCF Ubiquitin Ligase Can Recognize and Mark Various Target

question 18

Multiple Choice

The SCF ubiquitin ligase can recognize and mark various target proteins at different stages of the cell cycle. In this complex, …

• A) different F-box subunits recognize different target proteins.
• B) the F-box subunit and the E2 ubiquitin-conjugating enzyme are at the opposite ends of the C-shaped molecule.
• C) a scaffold protein arranges the other subunits such that the two ends of the complex are separated by a gap.
• D) the use of interchangeable parts such as the F-box subunits makes economical use of the genetic information and allows for rapid evolution of new functions.
• E) All of the above.

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Definitions:

Inorganic Carbons

Carbon compounds that do not contain carbon-hydrogen bonds, typically excluding those found in living organisms or their remains.

Nitrogen-Fixing Bacteria

Bacteria capable of converting atmospheric nitrogen into ammonia, making nitrogen available to plants for growth.

T. Aquaticus

A species of bacterium that thrives in hot environments and is a source of Taq polymerase, a key enzyme in PCR (polymerase chain reaction) technology.

Agrobacterium

A genus of bacteria known for its ability to transfer DNA to plant cells, widely used in genetic engineering to introduce new genes into plant genomes.