Homework Answers
ATP becomes bound the Myosin motor moves towards the plus end (energized) and binds weakly to actin ATP hydrolyzes to ADP+pi power stroke Myosin binds tightly to actin ,moves to a rigor position & pulls actin.
At last ADP and phosphate released and Myosin release from actin.
B In rigor mortis myosin binds tightly to actin,in the absence of ATP myosin can not dissociate from actin and the muscle becomes stiff.ATP is required for separation of actin myosin cross bridge during relaxation of muscle .when oxygen is not present anerobic glycolysis happens ,the ATP concentration diminish and thus occur the stiffening of the body.
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5. (4pts) A. Referring to the cross-bridge cycle in muscle contraction, please match the following changes...
3) Which of the following statements about the myosin cross bridge cycle is false? I. The...
3) Which of the following statements about the myosin cross bridge cycle is false? I. The binding of ATP to myosin reduces myosin's affinity for actin. II. In the basal state (as in rigor mortis), there is no ATP and so the myosin cannot bind to actin to generate the next stroke. III. The cocking of myosin head requires the hydrolysis of the bound ATP. A) I B) II C) III D) I, II E) II, III
1.During skeletal muscle contraction, the following occurs except A)ATP hydrolysis directly causes the movement of the...
1.During skeletal muscle contraction, the following occurs except A)ATP hydrolysis directly causes the movement of the myosin head to cause a power stroke B)When the myosin head releases a phosphate, it can bind actin C)When a new ATP binds to a myosin head, it releases actin D)ATP hydrolysis activates the myosin head so it can bind actin E)When the myosin head binding actin releases ADP, it moves to create the power stroke 2.During skeletal muscle contraction, the length of the...
Number these items in the order in which they occur in The Cross- bridge Cycle. #1...
Number these items in the order in which they occur in The Cross- bridge Cycle. #1 should be the event which happens right after membrane channels in the sarcoplasmic reticulum open. Ca+2 binds to troponin. ATP binds to myosin heads. ATP is hydrolyzed. Cross bridges form. Myosin heads are energized. Cross-bridges detach. Power stroke occurs. Tropomyosin moves; actin binding sites are exposed.
8 Number the following events of skeletal muscle contraction in the proper order, with number 1...
8 Number the following events of skeletal muscle contraction in the proper order, with number 1 for the first event and number 6 for the last event. A power stroke occurs as myosin moves into its relaxed position and pulls the thin filament toward the M line. Calcium ions bind to troponin, which pulls tropomyosin away from actin. ATP breaks the actin-myosin attachment, after which ATP is hydrolyzed and myosin is recocked. The myosin head binds to an actin subunit....
(15). Muscle cells contain , which are composed of thin filaments made of ts made ofarranged...
(15). Muscle cells contain , which are composed of thin filaments made of ts made ofarranged as thousands of . Myosin is a motor protein that moves towards the WWwe end of actin. and eNN Calcium is stored in specialized endoplasmic reticulum called released in response to depolarization of the . Calcium binds to MMMN , uncovering the myosin binding which results in a conformational change in sites on actin. Binding of ATP to myosin causes the hydrolysis of ATP...
1. During muscle contraction, hydrolysis of ATP results in A) a change in the conformation of...
1. During muscle contraction, hydrolysis of ATP results in A) a change in the conformation of actin B) a change in the conformation of myosin C) association of myosin head to actin D) dissociation of myosin from actin E) no effect on muscle contraction 2. The steady state assumption, as a to monosubstrate enzyme kinetics, implies: A) Concentration of substrate is not changing B) Concentration of product is not changing C) Concentration of ES complex is not changing D) Formation...
6. a correct order of events of a muscle contraction stars correct Which of the following (A-E) represents with the...
6. a correct order of events of a muscle contraction stars correct Which of the following (A-E) represents with the binding of ATP to the myosin head? (I point) 9. 1- () The myosin head binds to the actin filament to form a cross bridge myosin and actin separate (3) ATP is hydrolyzed to ADP and P (4) The power stroke is initiated A. 1, 2, 3,4 B. 2, 1. 4, 3 C. 3, 2, 1, 4 D. 2, 3,...
Number these items in the order in which they occur in The Cross- bridge Cycle. #1 should be the event which happens right after membrane channels in the sarcoplasmic reticulum open. Ca+2 binds to troponin. ATP binds to myosin heads. ATP is hydrolyzed. Cross bridges form. Myosin heads are energized. Cross-bridges detach. Power stroke occurs. Tropomyosin moves; actin binding sites are exposed.
8 Number the following events of skeletal muscle contraction in the proper order, with number 1 for the first event and number 6 for the last event. A power stroke occurs as myosin moves into its relaxed position and pulls the thin filament toward the M line. Calcium ions bind to troponin, which pulls tropomyosin away from actin. ATP breaks the actin-myosin attachment, after which ATP is hydrolyzed and myosin is recocked. The myosin head binds to an actin subunit....
(15). Muscle cells contain , which are composed of thin filaments made of ts made ofarranged as thousands of . Myosin is a motor protein that moves towards the WWwe end of actin. and eNN Calcium is stored in specialized endoplasmic reticulum called released in response to depolarization of the . Calcium binds to MMMN , uncovering the myosin binding which results in a conformational change in sites on actin. Binding of ATP to myosin causes the hydrolysis of ATP...
1. During muscle contraction, hydrolysis of ATP results in A) a change in the conformation of actin B) a change in the conformation of myosin C) association of myosin head to actin D) dissociation of myosin from actin E) no effect on muscle contraction 2. The steady state assumption, as a to monosubstrate enzyme kinetics, implies: A) Concentration of substrate is not changing B) Concentration of product is not changing C) Concentration of ES complex is not changing D) Formation...
6. a correct order of events of a muscle contraction stars correct Which of the following (A-E) represents with the binding of ATP to the myosin head? (I point) 9. 1- () The myosin head binds to the actin filament to form a cross bridge myosin and actin separate (3) ATP is hydrolyzed to ADP and P (4) The power stroke is initiated A. 1, 2, 3,4 B. 2, 1. 4, 3 C. 3, 2, 1, 4 D. 2, 3,...
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