Biology Mcqs

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

Enzymes __________________ the activation energy of a chemical reaction?

A. Increases
B. Decreases
C. Does not effect
D. Increases or decreases depending upon individual enzyme

Amoeboid movements and movement of cyclosis is due to_________?

A. Microfilaments
B. Microtubules
C. Intermediate filaments
D. Cytoskeleton

Which step causes activation of catalytic site of an enzyme__________________?

A. Change in pH of the surroundings.
B. Formation of Enzyme Susstrate complex.
C. Change in the charge of the active site.
D. Change in temperature

Lock and Key model was proposed by______________?

A. Emil Fischer
B. Koshland
C. Robin Williams
D. Rudolph Virchow

Ribonucleo-protein particles are the name of__________?

A. DNA
B. Nucleus
C. Eukaryotic ribosomes
D. RNA