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Q.28 The drug sildenafil (Viagra) works by: 1. Relaxation of smooth muscles and vasodilation by activating geranylyl cyclase 2. Contraction of smooth muscles and vasodilation by activating adenylyl cyclase 3. […]

Q.27 Synthesis of 2.3-bisphosphoglycerate increases in high altitude because: 1. 2,3-bisphosphoglycerate favours the relaxed state of haemogobin 2. 2,3-bisphosphoglycerate serves as an energy source at high altitudes 3. 2.3-bisphosphoglycerate stabilizes […]

Q.26 Molarity is defined as No. of moles of solute in 1 liter of solution No. of moles of solute in 1 kg of solvent No. of moles of solvent […]

Q.25 Proteins can be separated electrophoretically on the basis of net acidic and basic charge tlurough 1. Isoelectric focusing 2. Differential centrifugation 3. Countercurrent Immunoelectrophoresis 4. Pulse field gel electrophoresis […]

Q.24 Which compound in red cells is ctucial in determining the oxygen affinity of haemoglobin ? 1. Inositol triphosphate 2. Glyceraldehyde-3-phosphate 3.2, 3- Bisphosphoglycerate 4. Phosphatidyl inositol 2,3-Bisphosphoglycerate (2,3-BPG) in […]

Q.23 Another name for cardio lipin is 1. Phosphatidyl choline 2. Phosphatidyl serine 3. Phosphatidyl inositol 4. Diphosphatidyl glycerol Correct Answer: 4. Diphosphatidyl glycerol Cardiolipin, also known as diphosphatidylglycerol, is […]

Q.22 Which ofthe following organelle is pelleted first during sub-cellular fractionation by differential centrifugation at 1000 g for 10 minutes 1. Nuclei 2. Mitochondria 3. Lysosome 4. Endoplasmic reticulum Correct […]

Q.21 Mass-to-Charge or niz ratio can be measured through 1. Gas chromatography 2. I-TV-vis spectrophotometer 3. Fluorescence spectrophotometer 4. Mass spectrophotometer Correct Answer: 4. Mass spectrophotometer Mass-to-charge (m/z) ratio measures […]

Q.20 Cyanide is probably the most potent inhibitor of electron transport chain. It binds to: NADH dehydrogenase ATP synthase Succinate dehydrogenase Fe3+ of cytochrome oxidase Cyanide is the most potent […]

Q.19 Which is not a palt of the cytoskeleton? l. Serpm 2. Tubulin 3. Actm 4. Kelatin Serpin is not a part of the cytoskeleton, while the other options are […]