Q. All the following statements are true except Ornithine and citrulline are uncommon aminoacids Ornithine is an intermediates in Urea cycle Ormithine and citrulline are uncommon amino acids present in many proteins Both ornithine and citrulline are intermediates in urea cycle Answer: Ormithine and citrulline are uncommon amino acids present in many proteins Girl in […]
Q. Tri-peptide consists 3 amino acids and 3 peptide bonds 2 amino acids and 3 peptide bonds 3 amino acids and 2 peptide bonds 3 amino acids and 4 peptide bonds Answer: 3 amino acids and 2 peptide bonds
Q. Peptide bonds between amino acids are highly stable and have a half-life of seven years in intracellular condition. This is due to High activation energy required for hydrolysis Low activation energy required for hydrolysis Peptide bond is a covalent bond Peptide bond is rigid and planar Answer: High activation energy required for hydrolysis
Q. 4-hydroxy proline is present in Collagen Plant cell wall Keratin Both plant cell wall and collagen Answer: Both plant cell wall and collagen
Q. ATP concentration is maintained relatively constant during muscle contraction by increasing the metabolic activity the action of adenylate kinase theaction of creatne phosphokinase all of the above Answer: all of the above
ATP concentration is maintained relatively constant during muscle contraction by Read More »
Q. Lysis of a fibrin clot: is an equibrium wwith formation of the clot begins when plasmin binds to the clot requires the hydrolysis of plasminogen into heavy and light chains requires conversion of plasminogen by tissue plasminogen activator Answer: requires conversion of plasminogen by tissue plasminogen activator
Q. When a muscle contracts, the Transverse tubules shorten, the myofibrils and sarcoplasmic reticulum close together Thin filaments and thick filaments of the sarcomere shorten Light chains dissociate from the heavy chains of myosin H bands and I bands of the sarcomere shorten because the thin filaments and thick filaments side past each other Answer:
Q. The nerve impulse that initiates muscular contraction begins with the binding of acetyl choline to receptors in the sarcoplasmic reticulum causes both the plasma membrane and the transverse tubules to undergo hyperpolariation causes opening of calcium channels which lead to an increase in calcium contreation within the sarcomere prevents sodium entering the sarcomere Answer:
The nerve impulse that initiates muscular contraction Read More »
Q. Platelet aggregation: is initiated at the site of an injury by conversion of fibrinogen to fibrin is inhibited in uninjured blood vessels by the secretion of prostacyclin by intact vascular endothelium causes morphological changes and a release of the vasodilator serotonine is inhibited by the release of ADP and thromboxane A2 Answer: is inhibited
