Question

Mark the wrong statement about enzymes

A
enzymes are biological catalysts
B
each enzyme can catalyse a number of similar reactions
C
enzymes are very efficient catalysts
D
enzymes are needed only in very small amounts for their action
Solution
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Option (B) is incorrect. Enzymes are efficient and biological catalysts which are needed only in very small amounts for their action but each enzyme can catalyse only a specific selective reactions. This is often referred to as "the lock and key" model.

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Micronutrients are essential to plant growth and health that are only needed in very small quantities. Which of the following are not micronutrients in plants?

(1) Zinc (2) Manganese

(3) Iron (4) Sodium

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Q2

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The substance required by the body in very small amounts are called macronutrients.

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