Smut are plant disease caused by
several species of fungi that affects plants such as, corn, wheat, and sorghum.
Smut is characterized by fungal spores which are infectious and can affect
different parts of the plant at the same time. The fungi attacks grain crops by
forming thick, fleshy, gall on the ear, tassel, stalk and leaves of the plant. Smut
are destructive to grain crops, with negative economic effects to the farmer.
A DNA molecule is like a ladder because there are two sides (the sugar-phosphate backbones of the two strands) and rungs (each rung being a pair of complementary bases). Twisted, because the molecule is twined in a coil called a helix - or rather, a double helix because there are two strands.
Answer:
The correct answer will be option-D.
Explanation:
Calcium plays an important role in muscle contraction as they are released from the sarcoplasmic reticulum after they receive electric impulse.
Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.
This cross-bridge formation causes the contraction of the sarcomere and therefore muscle contracts.
Thus, option-D is the correct answer.
The constant turnover of body tissues requires the <u>chemical energy </u>supplied by carbohydrates, proteins, and lipids.
<h3> What is Chemical energy?</h3>
- The bonds of chemical molecules contain energy.
- Exothermic reactions are those in which chemical energy is released during the reaction, frequently in the form of heat.
- Some of the heat energy needed for a reaction to continue can be stored as chemical energy in newly created bonds.
- The body transforms the chemical energy in food into heat and mechanical energy.
- At a power plant, coal's chemical energy is transformed into electrical energy. Through the process of electrolysis, the chemical energy in a battery can also generate electricity.
Learn more about chemical energy here:
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