Mechanism of Muscle Contraction
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BIOXI20: LOCOMOTION AND MOVEMENT

340037 Assertion :
A motor unit is a group of motor neurons in CNS.
Reason :
A motor unit inhibits movement

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
BIOXI20: LOCOMOTION AND MOVEMENT

340038 Calcium is important in skeletal muscle contraction because it

1 Detaches the myosin head form the actin filament.
2 activates the myosin ATPase by binding to it.
3 Binds to troponin to remove the masking of active sites on actin for myosin.
4 Prevents the formation of bonds between the myosin cross bridges and the actin filament.
NEET - 2018
BIOXI20: LOCOMOTION AND MOVEMENT

339979 During contraction of muscles \(\mathrm{Ca}^{2+}\) attaches to

1 Tropomyosin
2 Troponin-C
3 Calmodulin
4 Cal bindin
BIOXI20: LOCOMOTION AND MOVEMENT

339975 Calcium is important in skeletal muscle contraction because it is needed for

1 Unmasking of actin-binding sites on myosin
2 Hydrolysis of ATP by myosin head
3 Unmasking of myosin-binding sites on actin
4 Polymerization of globular actins into filamentous actin
BIOXI20: LOCOMOTION AND MOVEMENT

339976 Consider the following statements with blank
i. Globular head of meromyosin is an active ATPase enzyme and has binding sites for A and active sites for B
ii. This central part of thick filament not overlapped by thin filaments is called C
iii. Repeated activation of the muscles can lead to the accumulation of \(\mathrm{D}\) due to anaerobic breakdown of glycogen in them causing fatigue
Select the correct option correctly filling the concerned blanks

1 D-pyruvic acid, A- Troponin, C- A band B- myosin
2 A- ATP, B-actin, C- \(\mathrm{H}\) zone, D- lactic acid
3 D- glucose, C- A band, B- Actin, A- ATP
4 D- lactic acid, C-I band, A- ATP, B- Actin
NEET DIGITAL LIBRARY
BIOXI20: LOCOMOTION AND MOVEMENT

340037 Assertion :
A motor unit is a group of motor neurons in CNS.
Reason :
A motor unit inhibits movement

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
BIOXI20: LOCOMOTION AND MOVEMENT

340038 Calcium is important in skeletal muscle contraction because it

1 Detaches the myosin head form the actin filament.
2 activates the myosin ATPase by binding to it.
3 Binds to troponin to remove the masking of active sites on actin for myosin.
4 Prevents the formation of bonds between the myosin cross bridges and the actin filament.
NEET - 2018
BIOXI20: LOCOMOTION AND MOVEMENT

339979 During contraction of muscles \(\mathrm{Ca}^{2+}\) attaches to

1 Tropomyosin
2 Troponin-C
3 Calmodulin
4 Cal bindin
BIOXI20: LOCOMOTION AND MOVEMENT

339975 Calcium is important in skeletal muscle contraction because it is needed for

1 Unmasking of actin-binding sites on myosin
2 Hydrolysis of ATP by myosin head
3 Unmasking of myosin-binding sites on actin
4 Polymerization of globular actins into filamentous actin
BIOXI20: LOCOMOTION AND MOVEMENT

339976 Consider the following statements with blank
i. Globular head of meromyosin is an active ATPase enzyme and has binding sites for A and active sites for B
ii. This central part of thick filament not overlapped by thin filaments is called C
iii. Repeated activation of the muscles can lead to the accumulation of \(\mathrm{D}\) due to anaerobic breakdown of glycogen in them causing fatigue
Select the correct option correctly filling the concerned blanks

1 D-pyruvic acid, A- Troponin, C- A band B- myosin
2 A- ATP, B-actin, C- \(\mathrm{H}\) zone, D- lactic acid
3 D- glucose, C- A band, B- Actin, A- ATP
4 D- lactic acid, C-I band, A- ATP, B- Actin
Join With Us for More Updates
BIOXI20: LOCOMOTION AND MOVEMENT

340037 Assertion :
A motor unit is a group of motor neurons in CNS.
Reason :
A motor unit inhibits movement

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
BIOXI20: LOCOMOTION AND MOVEMENT

340038 Calcium is important in skeletal muscle contraction because it

1 Detaches the myosin head form the actin filament.
2 activates the myosin ATPase by binding to it.
3 Binds to troponin to remove the masking of active sites on actin for myosin.
4 Prevents the formation of bonds between the myosin cross bridges and the actin filament.
NEET - 2018
BIOXI20: LOCOMOTION AND MOVEMENT

339979 During contraction of muscles \(\mathrm{Ca}^{2+}\) attaches to

1 Tropomyosin
2 Troponin-C
3 Calmodulin
4 Cal bindin
BIOXI20: LOCOMOTION AND MOVEMENT

339975 Calcium is important in skeletal muscle contraction because it is needed for

1 Unmasking of actin-binding sites on myosin
2 Hydrolysis of ATP by myosin head
3 Unmasking of myosin-binding sites on actin
4 Polymerization of globular actins into filamentous actin
BIOXI20: LOCOMOTION AND MOVEMENT

339976 Consider the following statements with blank
i. Globular head of meromyosin is an active ATPase enzyme and has binding sites for A and active sites for B
ii. This central part of thick filament not overlapped by thin filaments is called C
iii. Repeated activation of the muscles can lead to the accumulation of \(\mathrm{D}\) due to anaerobic breakdown of glycogen in them causing fatigue
Select the correct option correctly filling the concerned blanks

1 D-pyruvic acid, A- Troponin, C- A band B- myosin
2 A- ATP, B-actin, C- \(\mathrm{H}\) zone, D- lactic acid
3 D- glucose, C- A band, B- Actin, A- ATP
4 D- lactic acid, C-I band, A- ATP, B- Actin
For More Updates join with Us
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BIOXI20: LOCOMOTION AND MOVEMENT

340037 Assertion :
A motor unit is a group of motor neurons in CNS.
Reason :
A motor unit inhibits movement

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
BIOXI20: LOCOMOTION AND MOVEMENT

340038 Calcium is important in skeletal muscle contraction because it

1 Detaches the myosin head form the actin filament.
2 activates the myosin ATPase by binding to it.
3 Binds to troponin to remove the masking of active sites on actin for myosin.
4 Prevents the formation of bonds between the myosin cross bridges and the actin filament.
NEET - 2018
BIOXI20: LOCOMOTION AND MOVEMENT

339979 During contraction of muscles \(\mathrm{Ca}^{2+}\) attaches to

1 Tropomyosin
2 Troponin-C
3 Calmodulin
4 Cal bindin
BIOXI20: LOCOMOTION AND MOVEMENT

339975 Calcium is important in skeletal muscle contraction because it is needed for

1 Unmasking of actin-binding sites on myosin
2 Hydrolysis of ATP by myosin head
3 Unmasking of myosin-binding sites on actin
4 Polymerization of globular actins into filamentous actin
BIOXI20: LOCOMOTION AND MOVEMENT

339976 Consider the following statements with blank
i. Globular head of meromyosin is an active ATPase enzyme and has binding sites for A and active sites for B
ii. This central part of thick filament not overlapped by thin filaments is called C
iii. Repeated activation of the muscles can lead to the accumulation of \(\mathrm{D}\) due to anaerobic breakdown of glycogen in them causing fatigue
Select the correct option correctly filling the concerned blanks

1 D-pyruvic acid, A- Troponin, C- A band B- myosin
2 A- ATP, B-actin, C- \(\mathrm{H}\) zone, D- lactic acid
3 D- glucose, C- A band, B- Actin, A- ATP
4 D- lactic acid, C-I band, A- ATP, B- Actin
NEET DIGITAL LIBRARY
BIOXI20: LOCOMOTION AND MOVEMENT

340037 Assertion :
A motor unit is a group of motor neurons in CNS.
Reason :
A motor unit inhibits movement

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and Reason are incorrect.
BIOXI20: LOCOMOTION AND MOVEMENT

340038 Calcium is important in skeletal muscle contraction because it

1 Detaches the myosin head form the actin filament.
2 activates the myosin ATPase by binding to it.
3 Binds to troponin to remove the masking of active sites on actin for myosin.
4 Prevents the formation of bonds between the myosin cross bridges and the actin filament.
NEET - 2018
BIOXI20: LOCOMOTION AND MOVEMENT

339979 During contraction of muscles \(\mathrm{Ca}^{2+}\) attaches to

1 Tropomyosin
2 Troponin-C
3 Calmodulin
4 Cal bindin
BIOXI20: LOCOMOTION AND MOVEMENT

339975 Calcium is important in skeletal muscle contraction because it is needed for

1 Unmasking of actin-binding sites on myosin
2 Hydrolysis of ATP by myosin head
3 Unmasking of myosin-binding sites on actin
4 Polymerization of globular actins into filamentous actin
BIOXI20: LOCOMOTION AND MOVEMENT

339976 Consider the following statements with blank
i. Globular head of meromyosin is an active ATPase enzyme and has binding sites for A and active sites for B
ii. This central part of thick filament not overlapped by thin filaments is called C
iii. Repeated activation of the muscles can lead to the accumulation of \(\mathrm{D}\) due to anaerobic breakdown of glycogen in them causing fatigue
Select the correct option correctly filling the concerned blanks

1 D-pyruvic acid, A- Troponin, C- A band B- myosin
2 A- ATP, B-actin, C- \(\mathrm{H}\) zone, D- lactic acid
3 D- glucose, C- A band, B- Actin, A- ATP
4 D- lactic acid, C-I band, A- ATP, B- Actin