238254
The H-zone in the skeletal muscle fibre is due to:
1 extension of myosin filaments in the central portion of the A-band
2 The absence of myofibrils in the central portion of A-band
3 The central gap between myosin filaments in the A-band
4 The central gap between actin filaments extending through myosin filaments in the Aband
Explanation:
The A-band is the darkest band in the sarcomere, and its made up of thick myosin filaments. The I-band is the lightest band in the sarcomere, and it is made up of thin actin filaments. The \(\mathrm{H}\) - zone is the central region of the A-band where the Actin filament do not overlap. This is because the actin filaments are only half as long as the myosin filaments.
AIIMS-2016 / NEET-2013
Locomotion and Movement
238255
Which of the following protein can convert chemical energy in the ATP molecules into mechanical energy?
1 Actin
2 Troponin
3 Myosin
4 Tropo myosin
Explanation:
The protein that can convert chemical energy in ATP molecules into mechanical energy is myosin. Myosin is a motor protein that is involved in muscle contraction, It has a globular head region that binds to actin and utilizes ATP hydrolysis to generate force and movement. During muscle contraction, the myosin heads attach to the actin filament and undergo a series of conformational changes pulling the actin filaments. The energy required for this movement comes from the hydrolysis of ATP (adenosine triphosphate) into ADP (Adenosine diphosphate) and inorganic Phosphate(Pi) the energy released from. - ATP hydrolysis is used by the myosin. Heats to drive the movement of the actin filaments resulting in muscle contraction.
AP EAPCET-11.07.2022 Shift-I
Locomotion and Movement
238256
The globular head of myosin contains
1 Calcium ions in large quantities
2 Troponin
3 ATPase enzyme
4 ATP
Explanation:
The globular head of myosin contains ATPase (adenosine triphosphatase) enzyme activity. ATPase is an enzyme that catalyzes the hydrolysis of ATP(adenosine triphosphate) into ADP (adenosine diphosphate) and inorganic phosphate (Pi). This hydrolysis reaction released energy that is utilized by the myosin heads to generate force and movement during muscle contraction. The ATPase activity of the myosin head is crucial or the cross-bridge cycle in muscle contraction ATP binding to the myosin head triggers its detachment form. Followed by ATP hydrolysis which provides the energy for the myosin head to reattach to actin and generate force.
JIPMER-2017
Locomotion and Movement
238258
Regulatory proteins in a myofibril are
1 Actin, Myosin
2 Actin, Troponin
3 Myosin, Tropomyosin
4 Troponin, Tropomyosin
Explanation:
Actin and myosin are the contractile proteins in a myofibril, responsible or the generation of force during muscle contraction. - The myofibrils are made up of thick and thin myofilaments, which give the muscles striped appearance. The thick filaments are composed strands of the protein myosin and the thin filaments are strands of the protein actin, along with two other muscles regulatory proteins tropomyosin and troponin.
AP EAMCET-25.04.2018 Shift-I
Locomotion and Movement
238259
Actin binding sites are located on :
1 Troponin
2 Tropomyosin
3 Meromyosin
4 Both tropomyosin and meromyosin
5 Both troponin and tropomyosin
Explanation:
Actin binding sites are located on meromyosin. Actin is a globular protein that forms the thin filaments in muscle fibers. The binding of myosin to actin is essential for muscle contraction. 'However the binding sites on actin are regulated by meromyosin. Meromyosin is a monomeric protein present in myosin filament. The globular head of the meromyosin contains the actin binding site.
238254
The H-zone in the skeletal muscle fibre is due to:
1 extension of myosin filaments in the central portion of the A-band
2 The absence of myofibrils in the central portion of A-band
3 The central gap between myosin filaments in the A-band
4 The central gap between actin filaments extending through myosin filaments in the Aband
Explanation:
The A-band is the darkest band in the sarcomere, and its made up of thick myosin filaments. The I-band is the lightest band in the sarcomere, and it is made up of thin actin filaments. The \(\mathrm{H}\) - zone is the central region of the A-band where the Actin filament do not overlap. This is because the actin filaments are only half as long as the myosin filaments.
AIIMS-2016 / NEET-2013
Locomotion and Movement
238255
Which of the following protein can convert chemical energy in the ATP molecules into mechanical energy?
1 Actin
2 Troponin
3 Myosin
4 Tropo myosin
Explanation:
The protein that can convert chemical energy in ATP molecules into mechanical energy is myosin. Myosin is a motor protein that is involved in muscle contraction, It has a globular head region that binds to actin and utilizes ATP hydrolysis to generate force and movement. During muscle contraction, the myosin heads attach to the actin filament and undergo a series of conformational changes pulling the actin filaments. The energy required for this movement comes from the hydrolysis of ATP (adenosine triphosphate) into ADP (Adenosine diphosphate) and inorganic Phosphate(Pi) the energy released from. - ATP hydrolysis is used by the myosin. Heats to drive the movement of the actin filaments resulting in muscle contraction.
AP EAPCET-11.07.2022 Shift-I
Locomotion and Movement
238256
The globular head of myosin contains
1 Calcium ions in large quantities
2 Troponin
3 ATPase enzyme
4 ATP
Explanation:
The globular head of myosin contains ATPase (adenosine triphosphatase) enzyme activity. ATPase is an enzyme that catalyzes the hydrolysis of ATP(adenosine triphosphate) into ADP (adenosine diphosphate) and inorganic phosphate (Pi). This hydrolysis reaction released energy that is utilized by the myosin heads to generate force and movement during muscle contraction. The ATPase activity of the myosin head is crucial or the cross-bridge cycle in muscle contraction ATP binding to the myosin head triggers its detachment form. Followed by ATP hydrolysis which provides the energy for the myosin head to reattach to actin and generate force.
JIPMER-2017
Locomotion and Movement
238258
Regulatory proteins in a myofibril are
1 Actin, Myosin
2 Actin, Troponin
3 Myosin, Tropomyosin
4 Troponin, Tropomyosin
Explanation:
Actin and myosin are the contractile proteins in a myofibril, responsible or the generation of force during muscle contraction. - The myofibrils are made up of thick and thin myofilaments, which give the muscles striped appearance. The thick filaments are composed strands of the protein myosin and the thin filaments are strands of the protein actin, along with two other muscles regulatory proteins tropomyosin and troponin.
AP EAMCET-25.04.2018 Shift-I
Locomotion and Movement
238259
Actin binding sites are located on :
1 Troponin
2 Tropomyosin
3 Meromyosin
4 Both tropomyosin and meromyosin
5 Both troponin and tropomyosin
Explanation:
Actin binding sites are located on meromyosin. Actin is a globular protein that forms the thin filaments in muscle fibers. The binding of myosin to actin is essential for muscle contraction. 'However the binding sites on actin are regulated by meromyosin. Meromyosin is a monomeric protein present in myosin filament. The globular head of the meromyosin contains the actin binding site.
238254
The H-zone in the skeletal muscle fibre is due to:
1 extension of myosin filaments in the central portion of the A-band
2 The absence of myofibrils in the central portion of A-band
3 The central gap between myosin filaments in the A-band
4 The central gap between actin filaments extending through myosin filaments in the Aband
Explanation:
The A-band is the darkest band in the sarcomere, and its made up of thick myosin filaments. The I-band is the lightest band in the sarcomere, and it is made up of thin actin filaments. The \(\mathrm{H}\) - zone is the central region of the A-band where the Actin filament do not overlap. This is because the actin filaments are only half as long as the myosin filaments.
AIIMS-2016 / NEET-2013
Locomotion and Movement
238255
Which of the following protein can convert chemical energy in the ATP molecules into mechanical energy?
1 Actin
2 Troponin
3 Myosin
4 Tropo myosin
Explanation:
The protein that can convert chemical energy in ATP molecules into mechanical energy is myosin. Myosin is a motor protein that is involved in muscle contraction, It has a globular head region that binds to actin and utilizes ATP hydrolysis to generate force and movement. During muscle contraction, the myosin heads attach to the actin filament and undergo a series of conformational changes pulling the actin filaments. The energy required for this movement comes from the hydrolysis of ATP (adenosine triphosphate) into ADP (Adenosine diphosphate) and inorganic Phosphate(Pi) the energy released from. - ATP hydrolysis is used by the myosin. Heats to drive the movement of the actin filaments resulting in muscle contraction.
AP EAPCET-11.07.2022 Shift-I
Locomotion and Movement
238256
The globular head of myosin contains
1 Calcium ions in large quantities
2 Troponin
3 ATPase enzyme
4 ATP
Explanation:
The globular head of myosin contains ATPase (adenosine triphosphatase) enzyme activity. ATPase is an enzyme that catalyzes the hydrolysis of ATP(adenosine triphosphate) into ADP (adenosine diphosphate) and inorganic phosphate (Pi). This hydrolysis reaction released energy that is utilized by the myosin heads to generate force and movement during muscle contraction. The ATPase activity of the myosin head is crucial or the cross-bridge cycle in muscle contraction ATP binding to the myosin head triggers its detachment form. Followed by ATP hydrolysis which provides the energy for the myosin head to reattach to actin and generate force.
JIPMER-2017
Locomotion and Movement
238258
Regulatory proteins in a myofibril are
1 Actin, Myosin
2 Actin, Troponin
3 Myosin, Tropomyosin
4 Troponin, Tropomyosin
Explanation:
Actin and myosin are the contractile proteins in a myofibril, responsible or the generation of force during muscle contraction. - The myofibrils are made up of thick and thin myofilaments, which give the muscles striped appearance. The thick filaments are composed strands of the protein myosin and the thin filaments are strands of the protein actin, along with two other muscles regulatory proteins tropomyosin and troponin.
AP EAMCET-25.04.2018 Shift-I
Locomotion and Movement
238259
Actin binding sites are located on :
1 Troponin
2 Tropomyosin
3 Meromyosin
4 Both tropomyosin and meromyosin
5 Both troponin and tropomyosin
Explanation:
Actin binding sites are located on meromyosin. Actin is a globular protein that forms the thin filaments in muscle fibers. The binding of myosin to actin is essential for muscle contraction. 'However the binding sites on actin are regulated by meromyosin. Meromyosin is a monomeric protein present in myosin filament. The globular head of the meromyosin contains the actin binding site.
238254
The H-zone in the skeletal muscle fibre is due to:
1 extension of myosin filaments in the central portion of the A-band
2 The absence of myofibrils in the central portion of A-band
3 The central gap between myosin filaments in the A-band
4 The central gap between actin filaments extending through myosin filaments in the Aband
Explanation:
The A-band is the darkest band in the sarcomere, and its made up of thick myosin filaments. The I-band is the lightest band in the sarcomere, and it is made up of thin actin filaments. The \(\mathrm{H}\) - zone is the central region of the A-band where the Actin filament do not overlap. This is because the actin filaments are only half as long as the myosin filaments.
AIIMS-2016 / NEET-2013
Locomotion and Movement
238255
Which of the following protein can convert chemical energy in the ATP molecules into mechanical energy?
1 Actin
2 Troponin
3 Myosin
4 Tropo myosin
Explanation:
The protein that can convert chemical energy in ATP molecules into mechanical energy is myosin. Myosin is a motor protein that is involved in muscle contraction, It has a globular head region that binds to actin and utilizes ATP hydrolysis to generate force and movement. During muscle contraction, the myosin heads attach to the actin filament and undergo a series of conformational changes pulling the actin filaments. The energy required for this movement comes from the hydrolysis of ATP (adenosine triphosphate) into ADP (Adenosine diphosphate) and inorganic Phosphate(Pi) the energy released from. - ATP hydrolysis is used by the myosin. Heats to drive the movement of the actin filaments resulting in muscle contraction.
AP EAPCET-11.07.2022 Shift-I
Locomotion and Movement
238256
The globular head of myosin contains
1 Calcium ions in large quantities
2 Troponin
3 ATPase enzyme
4 ATP
Explanation:
The globular head of myosin contains ATPase (adenosine triphosphatase) enzyme activity. ATPase is an enzyme that catalyzes the hydrolysis of ATP(adenosine triphosphate) into ADP (adenosine diphosphate) and inorganic phosphate (Pi). This hydrolysis reaction released energy that is utilized by the myosin heads to generate force and movement during muscle contraction. The ATPase activity of the myosin head is crucial or the cross-bridge cycle in muscle contraction ATP binding to the myosin head triggers its detachment form. Followed by ATP hydrolysis which provides the energy for the myosin head to reattach to actin and generate force.
JIPMER-2017
Locomotion and Movement
238258
Regulatory proteins in a myofibril are
1 Actin, Myosin
2 Actin, Troponin
3 Myosin, Tropomyosin
4 Troponin, Tropomyosin
Explanation:
Actin and myosin are the contractile proteins in a myofibril, responsible or the generation of force during muscle contraction. - The myofibrils are made up of thick and thin myofilaments, which give the muscles striped appearance. The thick filaments are composed strands of the protein myosin and the thin filaments are strands of the protein actin, along with two other muscles regulatory proteins tropomyosin and troponin.
AP EAMCET-25.04.2018 Shift-I
Locomotion and Movement
238259
Actin binding sites are located on :
1 Troponin
2 Tropomyosin
3 Meromyosin
4 Both tropomyosin and meromyosin
5 Both troponin and tropomyosin
Explanation:
Actin binding sites are located on meromyosin. Actin is a globular protein that forms the thin filaments in muscle fibers. The binding of myosin to actin is essential for muscle contraction. 'However the binding sites on actin are regulated by meromyosin. Meromyosin is a monomeric protein present in myosin filament. The globular head of the meromyosin contains the actin binding site.
238254
The H-zone in the skeletal muscle fibre is due to:
1 extension of myosin filaments in the central portion of the A-band
2 The absence of myofibrils in the central portion of A-band
3 The central gap between myosin filaments in the A-band
4 The central gap between actin filaments extending through myosin filaments in the Aband
Explanation:
The A-band is the darkest band in the sarcomere, and its made up of thick myosin filaments. The I-band is the lightest band in the sarcomere, and it is made up of thin actin filaments. The \(\mathrm{H}\) - zone is the central region of the A-band where the Actin filament do not overlap. This is because the actin filaments are only half as long as the myosin filaments.
AIIMS-2016 / NEET-2013
Locomotion and Movement
238255
Which of the following protein can convert chemical energy in the ATP molecules into mechanical energy?
1 Actin
2 Troponin
3 Myosin
4 Tropo myosin
Explanation:
The protein that can convert chemical energy in ATP molecules into mechanical energy is myosin. Myosin is a motor protein that is involved in muscle contraction, It has a globular head region that binds to actin and utilizes ATP hydrolysis to generate force and movement. During muscle contraction, the myosin heads attach to the actin filament and undergo a series of conformational changes pulling the actin filaments. The energy required for this movement comes from the hydrolysis of ATP (adenosine triphosphate) into ADP (Adenosine diphosphate) and inorganic Phosphate(Pi) the energy released from. - ATP hydrolysis is used by the myosin. Heats to drive the movement of the actin filaments resulting in muscle contraction.
AP EAPCET-11.07.2022 Shift-I
Locomotion and Movement
238256
The globular head of myosin contains
1 Calcium ions in large quantities
2 Troponin
3 ATPase enzyme
4 ATP
Explanation:
The globular head of myosin contains ATPase (adenosine triphosphatase) enzyme activity. ATPase is an enzyme that catalyzes the hydrolysis of ATP(adenosine triphosphate) into ADP (adenosine diphosphate) and inorganic phosphate (Pi). This hydrolysis reaction released energy that is utilized by the myosin heads to generate force and movement during muscle contraction. The ATPase activity of the myosin head is crucial or the cross-bridge cycle in muscle contraction ATP binding to the myosin head triggers its detachment form. Followed by ATP hydrolysis which provides the energy for the myosin head to reattach to actin and generate force.
JIPMER-2017
Locomotion and Movement
238258
Regulatory proteins in a myofibril are
1 Actin, Myosin
2 Actin, Troponin
3 Myosin, Tropomyosin
4 Troponin, Tropomyosin
Explanation:
Actin and myosin are the contractile proteins in a myofibril, responsible or the generation of force during muscle contraction. - The myofibrils are made up of thick and thin myofilaments, which give the muscles striped appearance. The thick filaments are composed strands of the protein myosin and the thin filaments are strands of the protein actin, along with two other muscles regulatory proteins tropomyosin and troponin.
AP EAMCET-25.04.2018 Shift-I
Locomotion and Movement
238259
Actin binding sites are located on :
1 Troponin
2 Tropomyosin
3 Meromyosin
4 Both tropomyosin and meromyosin
5 Both troponin and tropomyosin
Explanation:
Actin binding sites are located on meromyosin. Actin is a globular protein that forms the thin filaments in muscle fibers. The binding of myosin to actin is essential for muscle contraction. 'However the binding sites on actin are regulated by meromyosin. Meromyosin is a monomeric protein present in myosin filament. The globular head of the meromyosin contains the actin binding site.
