FREE NEET Biology Practice MCQ Test: Mineral Nutrition Exercise 3 Questions Answers With Detailed Explanations [PDF]

Answer: (d)

Answer: (a)

Answer: (d)

Answer: (a)

Phosphorus and nitrogen ions generally get depleted in soil because they usually occur as negatively charged ions. Both the elements are essential for plants and acts as macromolecules which are required in large quantities

Answer: (b)

Answer: (c)

Answer: (b)

Answer: (b)

Potassium helps to maintain an anion-cation balance in cells and is involved in protein synthesis, opening and closing of stomata, activation of enzymes and in the maintenance of the turgidity of cells.

Answer: (b)

Answer: (a)

Microelements or minor elements are mostly involved in the functioning of enzymes as cofactors or metal activators.

Answer: (b)

Bladderwort or Utricularia is a rootless free floating insectivorous plant. Its stem is green and bears green lobed or dissected leaves. Some lobes of the leaves become modified into bladder like structures for catching insects. Sundew or Drosera is another insectivorous plant which has leaves that are green and bear many glandular hairs or tentacles having shining droplets to attract the insects and later trap them. Venus flytrap or Dionea is also an insectivorous plant in which the leaf is modified into two jaw like structures. Each jaw has long sensitive hairs on its upper surface and also has many digestive enzymes. These jaws interlock to trap the insect that enters in it. Thus Utricularia, Drosera and Dionea are all insectivorous plants.

Answer: (c)

Answer: (d)

Answer: (a)

Answer: (a)

Changing the chemistry of soil is not a role of an essential element.

Answer: (b)

Answer: (c)

Answer: (c)

Sulphur is present in all the cells of the body in association with proteins made of sulphur containing amino acids, viz., cystine, cysteine and methionine. Members of Cruciferae and animal proteins are rich sources of sulphur; other vegetable proteins (e.g., pulses) have only little sulphur. Plants absorb sulphur from soil in the form of sulphate ions ($SO_4$ – – ). It is a constituent of ferredoxin and some of the lipids present in chloroplasts. Pungent floroue and odour of mustard, cabbage, turnip etc. of Family Brassicaceae is due to the presence of sulphur containing oils. Application of 40 kg/ha to oilsed based cropping system is found to increase the yield, oil and protein content of the seeds.

Answer: (a)

Phosphorus and nitrogen ions generally get depleted in soil because they usually occur as negatively charged ions. Both the elements are essential for plants and act as macromolecules which are required in large quantities.

Answer: (a)