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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