Question

Match the following and mark correct option:

Column I	Column II
A. Fast muscle fibres	(i) Myoglobin
B. Slow muscle fibres	(ii) Lactic acid
C. Actin filament	(iii) Contractile unit
D. Sarcomere	(iv) I-band

• A. A-(i), B-(ii), C- (iv), D- (iii)
• B. A-(ii), B-(i), C - (iii), D- (iv)
• C. A-(ii), B-(i), C - (iv), D- (iii)
• D. A-(iii), B-(ii), C - (iv), D- (i)

Answer 1

The correct option is C A-(ii), B-(i), C - (iv), D- (iii)

The sarcomere is known as the ultimate unit of contraction. It is made up of actin and myosin filament.

Actin filaments are the ones that are also known as the thin filament and forms the isotropic part in the sarcomere.

Few fast muscle fibres are the ones that are present in the type of runners that runs for a short amount of time. They have high glycogen content and lactic acid contained in them because of anaerobic respiration and muscle fatigue.

Slow muscle fibre is found in those runners that need to have long and sturdy run. They have a high number of mitochondria and myoglobin because they need continuous ATP production or a large amount of time.

So, the correct option is 'A-(ii), B-(i), C - (iv), D- (iii)'