Author: admin

Q.24 Antibacterial action of penicillin could be attributed to Inhibition of the enzyme transpeptidase Inhibition of the cross linking of peptidoglycan side chain Hydrolysis of peptidoglycan Both 1 and 2 […]

Q.23 Lipopolysaccharide present in Gram negative bacterial cell wall is considered as an endotoxin because of Lipid A Core polysaccharide O side chain Integral proteins Lipid A is the reason lipopolysaccharide […]

Q.22 Gram staining is based on the presence of ______ in the cell wall. Phospholipid Peptidoglycan Lipid A Glycolipid Gram staining differentiates bacteria based on peptidoglycan thickness in the cell […]

Q.21 An enzyme without its required cofactor prosthetic group is referred as Coenzyme Holoenzyme Apoenzyme Catalyst Apoenzyme is the correct term for an enzyme without its required cofactor or prosthetic group. […]

Q.20 Intramolecular rearrangements are catalyzed by Transferases Oxidoreductases Isomerases Lyases Isomerases catalyze intramolecular rearrangements by converting a molecule into its isomer through internal atomic repositioning. Question Analysis This question focuses […]

Q.19 Which of the following is not a secondary messenger? Calcium Diacylglycerol cAMP AMP AMP is not a secondary messenger. Secondary messengers are small molecules that relay signals from cell surface […]

Q.18 The enzyme responsible for removal of DNA supercoils is Helicase Topoisomerase DNA ligase DNA polymerase Topoisomerase is the enzyme responsible for removing DNA supercoils. Option Analysis Helicase unwinds the DNA […]

Q.17 Which of the following is not associated with the extracellular matrix of the cells? Proteoglycans Cellulose Collagen Fibronectin Cellulose is not associated with the extracellular matrix (ECM) of animal […]

Q.16 The organelle absent in plant cells is Vacuoles Lysosome Chloroplast Centriole Plant cells differ from animal cells due to their unique organelles adapted for photosynthesis and structural support. The […]

Q.15 Michaelis-Menten constant (Km) is related to the Enzyme’s affinity for the substrate Enzyme’s activity for the substrate Enzyme’s specificity for the substrate Enzyme’s selectivity for the substrate The Michaelis-Menten […]