Cell Structure & Organelles MCQs with Answers

Which of the following is a characteristic of a non-competitive enzyme inhibitor?

• A.It competes with the substrate for the active site
• B.Point of action is allosteric site
• C.It permanently destroys the enzyme structure
• D.It increases the enzyme's affinity for the substrate

A competitive inhibitor:

• A.Is reversible
• B.Binds to the active site permanently
• C.Changes the shape of the enzyme irreversibly
• D.Binds to a site other than the active site

Splitting of glucose (glycolysis) releases a small amount of energy which is enough to generate _?

• A.4 ATP
• B.36 ATP
• C.38 ATP
• D.2 ATP

One of the following is not a macromolecule?

• A.Protein
• B.Nucleic acid
• C.Glucose
• D.Polysaccharide

Name the type of bond that join amino acids to form a polypeptide chain?

• A.Hydrogen bond
• B.Peptide bond
• C.Glycosidic bond
• D.Phosphodiester bond

Prokaryotic cells lack ?

• A.Cell wall
• B.Ribosomes
• C.Membrane bound organelles
• D.DNA

Oxidative phosphorylation is coupled with which process?

• A.Glycolysis
• B.Krebs Cycle
• C.Electron Transport Chain
• D.Fermentation

An enzyme without its cofactor is called _?

• A.Holoenzyme
• B.Apoenzyme
• C.Coenzyme
• D.Zymogen

Which statement is correct about the glycolysis process?

• A.2 ATP are produced and 2 ATP are consumed
• B.4 ATP are produced and 2 ATP are consumed
• C.2 ATP are produced and 4 ATP are consumed
• D.No ATP is produced or consumed

If there are 20 chromatids in a cell at metaphase, how many chromosomes are there in each daughter cell following cytokinesis?

• A.5
• B.40
• C.20
• D.10