Which of the following vitamins is a water-soluble vitamin that acts as a coenzyme in the metabolism of amino acids and fatty acids? MCQ with Answer and Explanation

Explanation:
Cardiac muscle cells are striated, branched, and connected by intercalated discs containing gap junctions for synchronized contraction. They are involuntary. Multinucleated syncytium is typical of skeletal muscle. Spindle-shaped non-striated cells characterize smooth muscle. Voluntary control is for skeletal muscle. Intercalated discs allow rapid ion passage, enabling the heart to function as a syncytium.

Explanation:
Xanthophylls, oxygenated carotenoids, are responsible for the yellow color of egg yolk, autumn leaves, and corn. Beta-carotene is orange, lycopene red.

Explanation:
Histoplasmosis is a respiratory fungal infection caused by inhaling spores of Histoplasma capsulatum, often found in bird or bat droppings. It can be severe in immunocompromised.