NEET Zoology Locomotion And Movement MCQs

Which of the following is NOT associated with muscle contraction?

A patient presents with muscle weakness and fatigue. Biochemical analysis reveals a defect in the calcium-binding protein crucial for muscle contraction, specifically within the thin filaments. Which protein is MOST likely affected?

A researcher is studying muscle contraction in vitro. They observe that even with sufficient ATP and $Ca^{2+}$$, contraction doesn't occur when they introduce a compound that specifically inhibits the binding of myosin heads to actin filaments. Which step of the cross-bridge cycle is directly affected by this compound?

In a skeletal muscle fiber, during a single twitch, the amount of tension generated during the contraction phase is directly proportional to:

During muscle contraction, the conformational change in the myosin head that leads to the power stroke is primarily driven by:

What protein filaments slide past each other during muscle contraction?

The sliding filament theory explains the mechanism of:

During muscle contraction, the cross-bridge cycle is initiated by the binding of which molecule to troponin?

In the sliding filament theory of muscle contraction, which of the following shortens during contraction?

The sliding filament theory explains the mechanism of which type of movement?