Only myosine is present in_____________?
Correct answer: C. H zone
- A. A band
- B. 1 band
- C. H zone
- D. Sarcomere
Explanation
The H zone is the central part of the sarcomere containing thick myosin filaments without overlapping thin actin filaments, so only myosin is present there. Students may choose the A band because it contains myosin, but the A band also includes regions where actin overlaps myosin.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Muscle Contraction
Muscle contraction is explained by the sliding filament model, in which myosin heads pull actin filaments within sarcomeres using ATP. The topic covers calcium, troponin, tropomyosin, the neuromuscular junction and relaxation, with attention to how filament length stays almost constant while the sarcomere shortens.
Practise Support and Movement
738 free Support and Movement MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Muscle Contraction questions
The one that stores calcium is __________?
A smallest contractile unit of muscle contraction called sarcomere is the area between two:
Diameter of thick filament is____________?
The given diagram shows two relaxed sarcomeres I and II from skeletal muscle.The effect of contraction of sarcomeres I and II on the A-band is that it will
In the muscle fibre, transverse tubules (T-tubules) are formed by the invagination ofsarcolemma. The function of these T-tubules is to
Troponin is one of the major proteins in the thin (actin) filaments of muscle fibres.It is a complex made up of three polypeptides with three binding sites for