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Which of the following ions help in muscle contraction?
Options
(a) K⁺ and Mg⁺⁺
(b) Na⁺ and K⁺
(c) Ca⁺⁺ and Na⁺
(d) Ca⁺⁺ and Mg⁺⁺
Correct Answer:
Ca⁺⁺ and Mg⁺⁺
Explanation:
Ca²⁺ as well as Mg⁺⁺ help in muslce contraction. Actin and myosin get combined in presence of ATP and Ca²⁺ to form actomyosin to Myosin + Actin –ATP/Ca²⁺—> Actomysin Energy released by the oxidation of food in the form of ATP is broken down into ADP, phosphorus and energy in the presence of enzyme myosin ATPase, Ca²⁺ and Mg²⁺ions. ATP + H₂O —myosin ATPase/Ca²⁺,Mg²⁺—–> ADP + Pi+ Energy The energy is used up in the contraction of muscle.
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Topics: Locomotion and Movement
(106)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The length of DNA molecule greatly exceeds the dimensions of the nucleus
- Number of prothallial cells present in an anther is
- Enzymes of Krebs’ or TCA cycle are located in the matrix of mitochondria
- Active transport of ions by the cell requires
- In sickel-cell anaemia, which of the following amino acids is substituted?
Topics: Locomotion and Movement (106)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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