Biology Mcqs

A three dimensional dcavity bearing a specific charge by which the enzyme reacts with its substrate is called_________________?

A. Active site
B. Binding site
C. Catalytic site
D. Allosteric site

Which statement about enzyme is incorrect_________________?

A. Some of them consist solely of protein with no non protein part.
B. They catalyze a chemical reaction without being utilized.
C. All enzymes are fibrous Proteins.
D. They without their cofactor are called apoenzyme.

Centrioles are composed of ________ triplets of microtubules.

A. 3
B. 9
C. 10
D. 15

An activated enzyme consisting of polypeptide chain and a cofactor is called_______________?

A. Apoenzyme
B. Holoenzyme
C. Activated enzyme
D. Both b and c

A cofactor made of inorganic ion which is detachable is called__________________?

A. Prosthetic group
B. Coenzyme
C. Activator
D. Cofactor

In golgi apparatus the maturing face is____________?

A. Biconcave
B. Convex
C. Spherical
D. Concave

In which of the following location enzymes controlling cellular respiration are present____________?

A. Nucleus
B. Chlorophast
C. Milochondria
D. Ribosome

Biological molecules (proteins) which catalyze a biochemical reaction and remain unchanged after completion of reaction are called_____________________?

A. Cofactor
B. Coenzymes
C. Activator
D. Enzymes

Proteins and lipids are converted into glycolipids and glycoproteins by adding carbohydrates by___________?

A. Ribosomes
B. Cytoplasm
C. Golgi apparatus
D. Endoplasmic reticulum

Which one forms the raw material for coenzymes_______________________?

A. Vitamins
B. Carbohydrates
C. Proteins
D. Metals