Question

The gene for a protein involved in basic cell function, such as glycolysis, would be expected to be

• A. Absent in most modern eukaryotes.
• B. Present in a large range of species.
• C. Exactly the same in all modern organisms.
• D. Found in animals and fungi, but not plants.

Answer 1

Answer: (C)

Exactly the same in all modern organisms.

Those genes that produce proteins required for basic/vital functions of the cell are called constitutive genes or housekeeping genes. These genes are same in all organisms, as all organisms have evolved from the same/universal common ancestor and so most of the basic metabolic process too are common in all organisms

So, the correct answer is 'Exactly the same in all modern organisms'