Question

Which of the following is a housekeeping protein?

• A. Actin
• B. Collagen
• C. Fibrin
• D. All of the above

Answer 1

The correct option is A Actin

Housekeeping gene is expressed in all the cells in normal and pathological conditions. The genes which are expressed in all cell types and almost all the time. These genes are called housekeeping genes. These genes code for constitutive proteins and are constantly needed for cellular activities. Housekeeping genes are basically used to maintain the basic functions in a cell. These proteins are required to build cytoskeleton, membranes, ribosomes and other organelles in cells. They are also required to catalyze vital chemical reactions, e.g. in glycolysis. Actin is a housekeeping protein. They perform those functions that are required by all the cells. It is part of the cytoskeleton's microfilaments. It is involved in cell motility, structure and integrity.

So, the correct answer is 'Housekeeping gene'.