An Important Group of Peripheral Membrane Proteins Are Enzymes, Such

question 69

Multiple Choice

An important group of peripheral membrane proteins are enzymes, such as the phospholipases that attack the head groups of phospholipids leading to the degradation of damaged membranes. What properties must these enzymes exhibit?

• A)resistance to degradation
• B)independence from cofactor interaction
• C)water solubility
• D)lipid solubility
• E)membrane spanning domains

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Definitions:

Microfilaments

Small, rod-like structures present in the cytoplasm of all eukaryotic cells, composed mainly of the protein actin, and involved in various forms of cell movement and in the maintenance of the cell's shape.

Rodlike Structures

Any elongated, cylindrical shapes or components found in biological organisms or cells, often referring to the physical structure of certain proteins or cellular organelles.

Actin

The protein of which microfilaments consist. Actin, together with the protein myosin, is responsible for muscle contraction.

Rough Endoplasmic Reticulum

A region of the endoplasmic reticulum associated with ribosomes, involved in the synthesis and processing of proteins.