All Are Correct Statements Regarding the Protein Degradation Process Involving

question 9

Multiple Choice

All are correct statements regarding the protein degradation process involving ubiquitin EXCEPT:

• A) The modified protein is degraded by an ATP-dependent protease complex.
• B) The ubiquitin binding to the protein to be degraded leads to a novel branched protein.
• C) The ubiquitin is covalently attached to a cysteine residue in the protein to be degraded.
• D) Three additional proteins (E₁, E₂, and E₃) are involved in the ligation of ubiquitin to the protein.
• E) Ubiquitin is a highly conserved protein.

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Definitions:

Aldol Condensation

A chemical reaction in which an enol or an enolate ion reacts with a carbonyl compound to form a β-hydroxyaldehyde or β-hydroxyketone, followed by a dehydration to give a conjugated enone.

Major Organic Product

In a chemical reaction, the organic product that is formed in the greatest quantity, often the focus of synthesis and prediction in organic chemistry.

Short Synthesis

A concise and efficient synthetic process for producing compounds, often desirable in organic chemistry for its time and resource efficiency.

Butanoic Acid

An organic compound with the formula C4H8O2, also known as butyric acid, characterized by its unpleasant smell and occurrence in butter and animal fat.