Mechanism of Muscle Contraction
BIOXI20: LOCOMOTION AND MOVEMENT

340024 Statement A :
Red muscles fibres depend on anaerobic process for energy
Statement B :
Red muslces fibres have more number of mitochondria and less no. of sarcoplasmic reticulum in them.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
BIOXI20: LOCOMOTION AND MOVEMENT

340025 All the following changes occur during contraction of a muscle fibre except

1 Width of A-band and I-band also remain same
2 Length of actin and myosin filaments remain same
3 Width of H-zone decreases and it finally disappears
4 Only actin filaments slide over the myosin filaments due to cross bridge formation, rotation of head and breaking of cross bridges regularly
BIOXI20: LOCOMOTION AND MOVEMENT

340026 Read the following statement with two blanks (A and B) \(\underline {\;{\rm{A}}\;} \) muscle fibers are adapted for activities such a marathon running. They are \(\underline {\;{\rm{B}}\;} \). The one correct option for the two blanks is:
\[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{\;\;\;{\rm{A}}}
\end{array}}&{\begin{array}{*{20}{l}}
{\;\;\;\;\;\;\;\;\;\;\;\;\;{\rm{B}}}
\end{array}}
\end{array}\]

1 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{White}}}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Slow - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
2 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{Red}}\;\;}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Slow - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
3 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{White}}}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Fast - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - prone}}\;\;\;}
\end{array}}
\end{array}\]
4 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{Red}}\;\;}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Fast - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
BIOXI20: LOCOMOTION AND MOVEMENT

340027 Binding of \(\mathrm{Ca}^{2+}\) with ____ in the skeletal muscles and leads to the exposure of the myosin binding site for ____ on the filament

1 Troponin, actin
2 Troponin, myosin
3 Actin, troponin
4 Tropomyosin, myosin
BIOXI20: LOCOMOTION AND MOVEMENT

340024 Statement A :
Red muscles fibres depend on anaerobic process for energy
Statement B :
Red muslces fibres have more number of mitochondria and less no. of sarcoplasmic reticulum in them.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
BIOXI20: LOCOMOTION AND MOVEMENT

340025 All the following changes occur during contraction of a muscle fibre except

1 Width of A-band and I-band also remain same
2 Length of actin and myosin filaments remain same
3 Width of H-zone decreases and it finally disappears
4 Only actin filaments slide over the myosin filaments due to cross bridge formation, rotation of head and breaking of cross bridges regularly
BIOXI20: LOCOMOTION AND MOVEMENT

340026 Read the following statement with two blanks (A and B) \(\underline {\;{\rm{A}}\;} \) muscle fibers are adapted for activities such a marathon running. They are \(\underline {\;{\rm{B}}\;} \). The one correct option for the two blanks is:
\[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{\;\;\;{\rm{A}}}
\end{array}}&{\begin{array}{*{20}{l}}
{\;\;\;\;\;\;\;\;\;\;\;\;\;{\rm{B}}}
\end{array}}
\end{array}\]

1 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{White}}}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Slow - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
2 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{Red}}\;\;}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Slow - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
3 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{White}}}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Fast - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - prone}}\;\;\;}
\end{array}}
\end{array}\]
4 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{Red}}\;\;}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Fast - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
BIOXI20: LOCOMOTION AND MOVEMENT

340027 Binding of \(\mathrm{Ca}^{2+}\) with ____ in the skeletal muscles and leads to the exposure of the myosin binding site for ____ on the filament

1 Troponin, actin
2 Troponin, myosin
3 Actin, troponin
4 Tropomyosin, myosin
BIOXI20: LOCOMOTION AND MOVEMENT

340024 Statement A :
Red muscles fibres depend on anaerobic process for energy
Statement B :
Red muslces fibres have more number of mitochondria and less no. of sarcoplasmic reticulum in them.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
BIOXI20: LOCOMOTION AND MOVEMENT

340025 All the following changes occur during contraction of a muscle fibre except

1 Width of A-band and I-band also remain same
2 Length of actin and myosin filaments remain same
3 Width of H-zone decreases and it finally disappears
4 Only actin filaments slide over the myosin filaments due to cross bridge formation, rotation of head and breaking of cross bridges regularly
BIOXI20: LOCOMOTION AND MOVEMENT

340026 Read the following statement with two blanks (A and B) \(\underline {\;{\rm{A}}\;} \) muscle fibers are adapted for activities such a marathon running. They are \(\underline {\;{\rm{B}}\;} \). The one correct option for the two blanks is:
\[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{\;\;\;{\rm{A}}}
\end{array}}&{\begin{array}{*{20}{l}}
{\;\;\;\;\;\;\;\;\;\;\;\;\;{\rm{B}}}
\end{array}}
\end{array}\]

1 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{White}}}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Slow - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
2 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{Red}}\;\;}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Slow - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
3 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{White}}}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Fast - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - prone}}\;\;\;}
\end{array}}
\end{array}\]
4 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{Red}}\;\;}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Fast - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
BIOXI20: LOCOMOTION AND MOVEMENT

340027 Binding of \(\mathrm{Ca}^{2+}\) with ____ in the skeletal muscles and leads to the exposure of the myosin binding site for ____ on the filament

1 Troponin, actin
2 Troponin, myosin
3 Actin, troponin
4 Tropomyosin, myosin
BIOXI20: LOCOMOTION AND MOVEMENT

340024 Statement A :
Red muscles fibres depend on anaerobic process for energy
Statement B :
Red muslces fibres have more number of mitochondria and less no. of sarcoplasmic reticulum in them.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
BIOXI20: LOCOMOTION AND MOVEMENT

340025 All the following changes occur during contraction of a muscle fibre except

1 Width of A-band and I-band also remain same
2 Length of actin and myosin filaments remain same
3 Width of H-zone decreases and it finally disappears
4 Only actin filaments slide over the myosin filaments due to cross bridge formation, rotation of head and breaking of cross bridges regularly
BIOXI20: LOCOMOTION AND MOVEMENT

340026 Read the following statement with two blanks (A and B) \(\underline {\;{\rm{A}}\;} \) muscle fibers are adapted for activities such a marathon running. They are \(\underline {\;{\rm{B}}\;} \). The one correct option for the two blanks is:
\[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{\;\;\;{\rm{A}}}
\end{array}}&{\begin{array}{*{20}{l}}
{\;\;\;\;\;\;\;\;\;\;\;\;\;{\rm{B}}}
\end{array}}
\end{array}\]

1 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{White}}}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Slow - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
2 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{Red}}\;\;}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Slow - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
3 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{White}}}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Fast - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - prone}}\;\;\;}
\end{array}}
\end{array}\]
4 \[\begin{array}{*{20}{c}}
{\begin{array}{*{20}{l}}
{{\rm{Red}}\;\;}
\end{array}}&{\begin{array}{*{20}{l}}
{{\rm{Fast - twitch}}\;{\rm{and}}}
\end{array}}\\
{}&{\begin{array}{*{20}{l}}
{{\rm{fatigue - resistant}}}
\end{array}}
\end{array}\]
BIOXI20: LOCOMOTION AND MOVEMENT

340027 Binding of \(\mathrm{Ca}^{2+}\) with ____ in the skeletal muscles and leads to the exposure of the myosin binding site for ____ on the filament

1 Troponin, actin
2 Troponin, myosin
3 Actin, troponin
4 Tropomyosin, myosin