PG TRB Preparation Zoology Questions with Answers CARBOHYDRATE Part - 15

226 . In which region glucerokinase enzyme is present?

                 Answer : Liver and kidney

227 . What is the function of glucerokinase?

                  Answer : This enzyme convert glycerol to glycerol – 3 – p in the presence of ATP

228 . Which enzyme convert glycerol to blood glucose?

                Answer : Glycerokinase

229 . What are the two muscle proteins involved in muscle contraction?

                 Answer : Actin and myosin

230 . Who discovered two types of actin in 1941?

                 Answer : Szent Gyorgi

231 . What are the two types of actin exist in the muscle?

                 Answer : Globular actin or  G . Actin , fibrous actin or  F . Actin

232 . Which actin has low viscosity?

              Answer : Globular actin or  G . Actin

233 . Which actin has high viscosity?

                 Answer :Fibrous actin or  F . Actin

234 . Which actin has strong affinity for myosin and combines with myosin in the ratio of 1: 3 to form actomyosin?

                 Answer: Fibrous actin or  F . Actin

235 . What is myosin?

                Answer : Myosin is a fibrous protein present in the muscle

236 . Which enzyme helps in the splitting of ATP  in the muscle?

                 Answer : Myosin adenosine tri phosphatase or ATP ase

237 . What are the nitrogenous constituents are involved in  muscle contraction?

                 Answer : Phosphocreatin, creatin, ATP, ADP, carnosine and anserine

238 . From where ATP for muscle contraction is derived?

               Answer : ATP for muscle contraction is derived from oxidation of carbohydrate, amino acid and fat through Krebs cycle.

239 . What are the principle chemical reactions are involved in muscle contraction?

                Answer : Breakdown of ATP, Breakdown of creatine phosphate, restoration of creatine phosphate.

240 . What is the initial event in muscle contraction as described by Szent Gyorge?

                 Answer : Action of ATP on actomyosin

241 . What is the next step in the break down of ATP?

                   Answer : ATP is hydrolysed by ATP – ase of myosin to form ADP, inorganic phosphate and energy.

242 . Who proposed sliding filament hypothesis for muscle contraction?

               Answer : Hanson and Huxley

243 . Who proposed the initial event of muscle contraction is the action of ATP on actomyosin?

                 Answer : Szent Gyorgi

245 . Impulse initiate muscle contraction.Who proposed this?

               Answer :  Hanson and Huxley

246 . Which ions are released from depolarised sarcoplasmicreticulum during muscle contraction?

                Answer : Ca++

247 . What is the function of  Ca++ in muscle contraction?

                Answer : These ions activate myosin – actin – ATP system

248 . What is the function of relaxing factor derived from sarcoplasmic reticulum in muscle contraction?

                   Answer :Relaxing factor derived from sarcoplasmicreticulum binds Ca ++ and inactivate them.

249 . What is the use of breakdown of creatine phosphate in muscle contraction?

                 Answer : Release of high – energy phosphate bond  from creatine phosphate and formation of creatin.

250 . Which is the most important shortage form of ~ ph in muscle?

                  Answer : Creatine phosphate 


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