MCQ on Micro and Macro Nutrients
MCQ on Micro and Macro Nutrients: As we know Elements are further divided into two broad categories based on their quantitative requirements (i) Macronutrients and (ii) Micronutrients.
(i) Macronutrients: They are generally required in plant tissues in large amounts i.e. excess of 10 m mole kg – 1 of dry matter. They are nine in number eg. carbon, hydrogen, oxygen, nitrogen, phosphorus, sulfur, potassium, calcium and magnesium. Out of these carbon, hydrogen and oxygen are mainly obtained from CO2 and H2O, while the others are absorbed from the soil as mineral nutrition.
(ii) Micronutrients or trace elements: They are needed in very small amounts i.e. less than 10m mole Kg – 1 of dry matter. They are eight in number. These include iron, manganese, copper, molybdenum, zinc, boron, chlorine and nickel. Fe is required in large amounts in comparision to other micronutrients, while Mo is required in minimum quantity.
Given below are a few MCQs on Nutrients (Macro and Micro) which will help the students analyze their conceptual knowledge. The answers are also provided for your reference
MCQ on Micro and Macro Nutrients
1. The carbohydrates, proteins, fats are the nutrients which are needed by the body in large amount and this is called as
(1) Micronutrients
(2) Macronutrients
(3) Artificial nutrients
(4) None of them
Answer: (2) Macronutrients
Explanation: Nutrients needed in large amounts, like carbohydrates, proteins, and fats, are macronutrients.
2. Which of the following are called macronutrients?
(1) Carbohydrates, Proteins, and Vitamins
(2) Minerals, Proteins, and Vitamins
(3) Carbohydrates, Proteins, and Fats
(4) Proteins, Fats, and Minerals
Answer: (3) Carbohydrates, Proteins, and Fats
Explanation: These three provide energy and are required in large amounts.
3. Which one of the following elements is not an essential micronutrient for plant growth?
(1) Ca
(2) Mn
(3) Zn
(4) Cu
Answer: (1) Ca
Explanation: Calcium is a macronutrient; Mn, Zn, and Cu are micronutrients.
4. Which of the following set contains macronutrients?
(1) P, N, K and Mg
(2) K, Mn, Fe and Co
(3) P, Fe, Mn and K
(4) Fe, Co, Si and N
Answer: (1) P, N, K and Mg
Explanation: Phosphorus, Nitrogen, Potassium, and Magnesium are macronutrients.
5. Which of the following set represents micronutrients?
(1) B, Ni, Mo, Mn, Fe
(2) B, N, Mo, Mn, P
(3) S, Ca, B, Mo, Fe
(4) N, Mo, Mn, K, Mg
Answer: (1) B, Ni, Mo, Mn, Fe
Explanation: These are all trace elements required in small amounts.
6. Which of the following are the micronutrients?
(1) Vitamins and Minerals
(2) Proteins and Vitamins
(3) Carbohydrates and Fats
(4) Proteins and Minerals
Answer: (1) Vitamins and Minerals
Explanation: These are required in small quantities and aid in metabolic functions.
7. Which is not a micronutrient?
(1) Boron
(2) Zinc
(3) Magnesium
(4) Molybdenum
Answer: (3) Magnesium
Explanation: Magnesium is a macronutrient, while the rest are micronutrients.
8. Which element is not considered as macronutrient?
(1) Mg
(2) Ca
(3) Mn
(4) P
Answer: (3) Mn
Explanation: Manganese is a micronutrient; the others are macronutrients.
9. The element which cannot be placed along with micronutrients is
(1) Mn
(2) Mo
(3) Cu
(4) Ca
Answer: (4) Ca
Explanation: Calcium is a macronutrient; the others are micronutrients.
10. Which of the following statements is incorrect regarding micronutrients?
(1) They are below 10 mmol/kg of dry weight in plants
(2) Below critical concentration they cause deficiency symptoms
(3) Moderate increase from critical concentration may cause toxicity
(4) Examples are N, P, Zn, Mn, Mo
Answer: (4)
Explanation: N and P are macronutrients; Zn, Mn, and Mo are micronutrients.
11. This is a major macronutrient, component of vitamins and enzymes.
(1) Sea salt
(2) Sulfur
(3) Carbon dioxide
(4) Calcium phosphate
Answer: (2) Sulfur
Explanation: Sulfur is an essential macronutrient and part of some vitamins (e.g., biotin).
12. Which of the following macronutrients is a structural component of a cell wall activating the enzymes?
(1) Nitrogen dioxide
(2) Boron dioxide
(3) Carbon monoxide
(4) Calcium
Answer: (4) Calcium
Explanation: Calcium plays a role in maintaining cell wall integrity and enzyme activity.
13. Minerals known to be required in large amounts for plant growth include
(1) Calcium, magnesium, manganese, copper
(2) Potassium, phosphorus, selenium, boron
(3) Magnesium, sulfur, iron, zinc
(4) Phosphorus, potassium, sulfur, calcium
Answer: (4)
Explanation: These are all macronutrients required in larger quantities for plant health.
14. Which of the following is true about micronutrients?
(1) Their concentration is below 25 millimole in dry weight
(2) Their concentration is below 30 millimole in dry weight
(3) Their concentration is below 10 millimole in dry weight
(4) Their concentration is below 20 millimole in dry weight
Answer: (3)
Explanation: Micronutrients are required in very small amounts, typically below 10 mmol/kg dry weight.
15. Which of the following macronutrient checks the opening and closing of the stomata and decreases the water loss from leaves?
(1) Nitrogen
(2) Methane
(3) Urea
(4) Potassium
Answer: (4) Potassium
Explanation: Potassium regulates stomatal movement, thus controlling water loss.