Biology

Minerals and Nutrients

936 Questions

Review essential biology concepts regarding minerals and nutrients in this question bank. It covers trace elements required by plants and minerals crucial for human blood and bone formation. These facts frequently appear in general science exams.

Essential plant micronutrientsChlorophyll synthesis elementsHuman blood and bone mineralsTrace elements in physiology

Minerals and Nutrients Questions

Multiple choice

Which one of the following is a component of chlorophyll?

  1. Iron

  2. Manganese

  3. Magnesium

  4. Calcium

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Chlorophyll contains magnesium at its center, which is essential for photosynthesis. The magnesium ion helps absorb light energy. Iron is found in hemoglobin, not chlorophyll. Manganese is a micronutrient for plants but not part of chlorophyll. Calcium is important for cell walls but not a chlorophyll component.

Multiple choice

Which among the following is a primary macronutrient required by the plants?

  1. Sulphur

  2. Phosphorus

  3. Calcium

  4. Silicon

  5. Magnesium
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Phosphorus is important in plant bioenergetics.It is a component of the complex nucleic acid structure of plants, which regulates protein synthesis. As a component of ATP, phosphorus is needed for the conversion of light energy to chemical energy (ATP) during photosynthesis. It is a primary macronutrient of the plants

Multiple choice

A gardener observed purple appearance on the stems, petioles and underside of leaves of few plants in his garden. The deficiency of which of the following minerals causes such abnormalities in the plants?

  1. Potassium

  2. Iron

  3. Boron

  4. Nitrogen

  5. Manganese
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Nitrogen is an essential component of all proteins.Nitrogen deficiency is probably the most common problem in rice and tends to be of large economic significance. Nitrogen deficient plants shows a remarkable purple appearance on the stems, petioles and underside of leaves from an accumulation of anthocyanin pigments.

Multiple choice

Essential elements according to their requirements are named as

  1. large nutrients and few nutrients

  2. macro nutrients and micro nutrients

  3. useful nutrients and non-useful nutrients

  4. macro elements and micro elements

  5. macro elements and nano elements
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Yes, it is correct. There are 17 essential elements, out of which 9 are present in large quantity in tissues, known as macro nutrients and 8 are present in small amounts in tissues, known as micro nutrients.

Multiple choice

If essential elements are below the amount of nutrients required for normal growth and development of plants, plants show certain morphological and observable characters known as deficiency symptoms. What is the term used for the level of nutrients here?

  1. Deficiency level

  2. Low level

  3. Dilute concentration

  4. Critical concentration

  5. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Yes, it is correct. If the amount of essential elements is less than the amount of nutrients required for normal growth and development of plants, the level is mentioned as critical concentration.

Multiple choice

Deficiency of which of the following elements is responsible for premature falling of leaves?

  1. Zinc

  2. Phosphorus

  3. Manganese

  4. Boron
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Phosphorus deficiency causes premature leaf fall because phosphorus is essential for energy transfer (ATP) and root development. When deficient, older leaves turn dark green or purplish, then yellow and fall off early as the plant mobilizes phosphorus from older tissues to new growth. Zinc, manganese, and boron deficiencies cause different symptoms like interveinal chlorosis, stunting, or cork formation.