Biology Mcqs

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

Answer

Submitted By :Ali Uppal

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

• (A)  Ribosomes
• (B)  Cytoplasm
• (C)  Golgi apparatus
• (D)  Endoplasmic reticulum

Answer

Submitted By :Ali Uppal

Which one forms the raw material for coenzymes_______________________?

• (A)  Vitamins
• (B)  Carbohydrates
• (C)  Proteins
• (D)  Metals

Answer

Submitted By :Ali Uppal

Enzymes __________________ the activation energy of a chemical reaction?

• (A)  Increases
• (B)  Decreases
• (C)  Does not effect
• (D)  Increases or decreases depending upon individual enzyme

Answer

Submitted By :Ali Uppal

Amoeboid movements and movement of cyclosis is due to_________?

• (A)  Microfilaments
• (B)  Microtubules
• (C)  Intermediate filaments
• (D)  Cytoskeleton

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

Lock and Key model was proposed by______________?

• (A)  Emil Fischer
• (B)  Koshland
• (C)  Robin Williams
• (D)  Rudolph Virchow

Answer

Submitted By :Ali Uppal

Ribonucleo-protein particles are the name of__________?

• (A)  DNA
• (B)  Nucleus
• (C)  Eukaryotic ribosomes
• (D)  RNA

Answer

Submitted By :Ali Uppal

Chlorophyll is a/an _____ molecule?

• (A)  Inorganic
• (B)  Cationic
• (C)  Anionic
• (D)  Organic

Answer

Submitted By :Ali Uppal

A group of ribosomes attached to mRNA is known as___________?

• (A)  Polymer
• (B)  Polypeptide
• (C)  Polysomes
• (D)  Monomer

Answer

Submitted By :Ali Uppal