The sarcoplasm of muscle fibers differs from the cytoplasm of the other cells as it contains usually:
Correct answer: B. A unique oxygen binding protein, myoglobin
- A. Large amount of stored starch
- B. A unique oxygen binding protein, myoglobin
- C. Hemoglobin that stores oxygen
- D. Large amount of stored lipids
Explanation
Option B is correct.Myoglobin is an oxygen-binding protein that is found in the sarcoplasm of muscle fibers. It is a red-colored protein that gives muscle its characteristic color. Myoglobin binds oxygen molecules and stores them in the sarcoplasm. When a muscle fiber contracts, the myoglobin releases oxygen to the mitochondria, where it is used to produce ATP, the energy molecule that powers muscle contraction.
Last updated
About Support and Movement
Support and movement covers the axial and appendicular skeleton, bone structure, joints and the arrangement of skeletal muscles. Muscle contraction is explained through actin, myosin, sliding filaments, calcium ions and ATP, while arthritis is distinguished as a disorder of joints rather than a normal part of movement.
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.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.