Mineral Nutrition and Absorption (Multiple Choice Questions and Answers)  

Mineral Nutrition and Absorption

Multiple Choice Questions and Answers

1. Which of the following elements is a component of ferredoxin?

(a) copper

(b) manganese

(c) zinc

(d) iron

Answer: (d) iron

2. Mineral salts absorbed by the roots from the soil are in the form of

(a) very dilute solution

(b) dilute solution

(c) concentrated solution

(d) very concentrated solution

Answer: (a) very dilute solution

3. Chlorosis occurs when plants are grown in

(a) dark

(b) shade

(c) strong light

(d) Fe-free medium

Answer: (d) Fe-free medium

4. Little leaf disease is developed due to deficiency of

(a) copper

(b) sodium

(c) zinc

(d) molybdenum

Answer: (c) zinc

5. ‘Dieback’ of Citrus and ‘reclamation’ of legume and cereals is due to the deficiency of

(a) copper

(b) sodium

(c) zinc

(d) molybdenum

Answer: (a) copper

6. Hydroponics is

(a) growing of aquatic plants

(b) growing of floating aquatic plants

(c) soil-less cultivation of plants

(d) growing of plants in water

Answer: (c) soil-less cultivation of plants

7. Presence of phosphorus

(a) brings about healthy root growth

(b) promotes fruit ripening

(c) retards protein formation

(d) none

Answer: (c) retards protein formation

8. The micronutrient among these is

(a) zinc

(b) nitrogen

(c) phosphorus

(d) calcium

Answer: (a) zinc

9. Zinc is essential for

(a) biosynthesis of chlorophylls

(b) biosynthesis of 3 Indole Acetic Acid

(c) stomatal closing

(d) oxidation of carbohydrates

Answer: (b) biosynthesis of 3 Indole Acetic Acid

10. Stem and root tips die due to deficiency of

(a) Nitrogen

(b) Phosphorus

(c) Calcium

(d) Sulphur

Answer: (c) Calcium

11. The theory suggesting that carbon dioxide produced in respiration helps in mineral absorption is called

(a) carbonic acid exchange theory

(b) contact exchange theory

(c) active mineral absorption

(d) Donnan-equilibrium

Answer: (a) carbonic acid exchange theory

12. Which one of the following plays an independent role in energy metabolism?

(a) calcium

(b) sodium

(c) sulphur

(d) phosphorus

Answer: (d) phosphorus

13. Nitrogen is an important constituent of

(a) proteins

(b) lipids

(c) carbohydrates

(d) phospholipids

Answer: (a) proteins

14. Soil salinity is measured by

(a) porometer

(b) photometer

(c) conductivity meter

(d) calorimeter

Answer: (c) conductivity meter

15. Minerals are absorbed by plants in

(a) colloidal form

(b) ionic form

(c) in solid form

(d) in molecular form

Answer: (b) ionic form

16. A membrane bound ion pump

(a) requires a protein carrier

(b) moves a molecule against its concentration

(c) requires a supply of energy

(d) all of the above

Answer: (d) all of the above

17. Mid-day closure of stomata is due to

(a) fatigue

(b) excessive transpiration

(c) fast wind

(d) high rate of photosynthesis

Answer: (b) excessive transpiration

18. Deficiency of iron causes

(a) interveinal chlorosis first on young leaves

(b) bending on leaf tip

(c) reduced leaf area and stunted growth

(d) decrease in protein synthesis

Answer: (a) interveinal chlorosis first on young leaves

19. Active process of salt absorption is inhibited by

(a) presence of oxygen

(b) presence of nitrogen

(c) absence of oxygen

(d) presence of sulphur

Answer: (c) absence of oxygen

20. Rosette of apple or peach is a disease due to deficiency of

(a) zinc

(b) manganese

(c) iron

(d) copper

Answer: (a) zinc

21. Which of the following chemical is essential for photolysis of water?

(a) oxygen

(b) carbon

(c) nitrogen

(d) chlorine

Answer: (d) chlorine

22. Which of the following is the main disadvantage of hydroponics?

(a) leaching

(b) anoxia

(c) antagonism

(d) contamination

Answer: (b) anoxia

23. Which of the following elements is required by the enzyme kinase?

(a) Iron

(b) Sodium

(c) Potassium

(d) Magnesium

Answer: (d) Magnesium

24. An element needed to reduce nitrate into nitrite is

(a) boron

(b) molybdenum

(c) zinc

(d) iron

Answer: (b) molybdenum

25. Immature leaf of plants fall down due to deficiency of

(a) sulphur

(b) zinc

(c) phosphorus

(d) sodium

Answer: (b) zinc

26. Deficiency of mineral nutrients is not responsible for

(a) shortening of internodes

(b) necrosis

(c) chlorosis

(d) etiolation

Answer: (d) etiolation

27. In the light of carrier concept, the transport of ions across the membrane is a

(a) passive process

(b) active process

(c) non osmotic process

(d) osmotic process

Answer: (c) non osmotic process

28. Which of the following is not an essential macro elements for the growth of plants?

(a) nitrogen

(b) zinc

(c) calcium

(d) potassium

Answer: (b) zinc

29. The soil particles, particularly clay and organic matter in the soil, contain negative charges that attract positively charged ions such as

(a) magnesium ions

(b) calcium ions

(c) potassium ions

(d) all of these

Answer: (d) all of these

30. Cultivation by sand culture is also called

(a) soil-less cultivation

(b) greenhouse effect

(c) photorespiration

(d) protein synthesis

Answer: (a) soil-less cultivation

31. Inorganic nutrients are present in the soil in the form of

(a) molecules

(b) atoms

(c) electrically charged ions

(d) organic compounds

Answer: (c) electrically charged ions

32. Ion carriers are located in

(a) cell wall

(b) intercellular spaces

(c) cell membrane

(d) nucleus

Answer: (c) cell membrane

33. Technique of growing plants without soil in nutrient solution is called

(a) parthenogenesis

(b) hydroponics

(c) aquaculture

(d) tissue culture

Answer: (b) hydroponics

34. The major role of minor elements inside living organisms is to act as

(a) cofactors of enzymes

(b) building blocks of important amino acids

(c) constituent of hormones

(d) binder of cell structure

Answer: (a) cofactors of enzymes

35. The major proportion of the dry weight of plant comprises of

(a) nitrogen, phosphorus and potassium

(b) calcium, magnesium and sulphur

(c) carbon nitrogen and hydrogen

(d) carbon hydrogen and oxygen

Answer: (d) carbon hydrogen and oxygen

36. In which of the following is nitrogen not a constituent?

(a) idioblast

(b) bacteriochlorophyll

(c) invertase

(d) pepsin

Answer: (a) idioblast

37. Boron in green plants assists in

(a) activation of enzymes

(b) acting as enzyme cofactor

(c) photosynthesis

(d) sugar transport

Answer: (d) sugar transport

38. Grey spots of oat are caused by deficiency of

(a) copper

(b) zinc

(c) manganese

(d) iron

Answer: (c) manganese

39. Which pigment is essential for nitrogen fixation by leguminous plants?

(a) anthocyanin

(b) phycocyanin

(c) leghaemoglobin

(d) phycoerythrin

Answer: (c) leghaemoglobin

40. Free living nitrogen fixing bacteria are found in

(a) air

(b) soil

(c) root nodules

(d) none of the above

Answer: (b) soil

41. Which of the following plants cannot fix atmospheric nitrogen directly?

(a) pea

(b) bean

(c) castor

(d) horse gram

Answer: (c) castor

 42. Symbiotic nitrogen fixation in root nodules of some leguminous plants is caused by

(a) Rhizobium

(b) Azotobacter

(c) Nitrobacter

(d) Nitrosomonas

Answer: (a) Rhizobium

 43. The process of decay of dead organic matter is known as

(a) denitrification

(b) nitrification

(c) nitrogen fixation

(d) ammonification

Answer: (d) ammonification

 44. Which one is not a micro element for plants?

(a) copper

(b) zinc

(c) chromium

(d) boron

Answer: (c) chromium

 45. Manganese is required for

(a) chlorophyll synthesis

(b) plant cell wall formation

(c) photolysis of water in photosynthesis

(d) nucleic acid synthesis

Answer: (c) photolysis of water in photosynthesis

 46. Simultaneous movement of two molecules across a membrane in the same direction is known as

(a) antiport

(b) uniport

(c) symport

(d) biuport

Answer: (c) symport

 47. Which of the following is a free living nitrogen fixing bacteria?

(a) Rhizobium

(b) Azotobacter

(c) Frankia

(d) Anabaena

Answer: (b) Azotobacter

 48. One of one example of micronutrient is

(a) potassium

(b) sulphur

(c) iron

(d) manganese

Answer: (d) manganese

 49. Nitrogen is stored in plants in the form of

(a) protein

(b) starch

(c) ammonia

(d) amino acids

Answer: (a) protein

 50. With increase in light intensity, the synthesis of nitrate reductase will

(a) increase

(b) decrease

(c) remain unaffected

(d) none of the above

Answer: (a) increase