Mineral Nutrition Objective Type Questions and Answers

Questions

21 Which of the following class of enzyme does not need manganese for its efficient activity?

A Dehydrogenase

B Decarboxylases

C Kinases

D Nitrogenase

View Answer

Answer: Decarboxylases

22 Deficiency of which mineral causes dark green coloration of the leaves?

A Phosphorus

B Potassium

C Nitrogen

D Calcium

View Answer

Answer: Phosphorus

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23 Which of the following element is needed by plants in a very small quantity?

A Phosphorus

B Carbon

C Sodium

D Magnesium

View Answer

Answer: Sodium

24 Name the mineral element which is required by a plant in a great amount?

A Calcium

B Cobalt

C Phosphorus

D Nitrogen

View Answer

Answer: Nitrogen

25 Name the technique which involves the growth of a plant by suspending their roots in the air?

A Diffusion

B Osmosis

C Hydroponics

D Aeroponics

View Answer

Answer: Aeroponics

26 Which one of the following is NOT a criteria for an element to be called as essential?

A These elements need not to take part in growth and development

B The function of an element must not be replaceable

C The element should be involved in plant metabolism

D A plant cannot complete its life cycle without these elements

View Answer

Answer: These elements need not to take part in growth and development

27 Most of the plants obtain nitrogen from the soil in the form of

A Free nitrogen gas

B Nitric acid

C Nitrites

D Nitrates

View Answer

Answer: Nitrates

28 Which one is an inorganic nutrient

A Cellulose

B Vitamin

C Calcium

D Protein

View Answer

Answer: Calcium

29 Which one of the following essential elements can land plants normally obtain directly from the air

A Hydrogen

B Carbon

C Nitrogen

D Phosphorus

View Answer

Answer: Carbon

30 Which of the following is a micronutrient

A Mg

B Zn

C Ca

D P

View Answer

Answer: Zn

31 Which of the following elements is not required by plant for their healthy normal growth

A Calcium

B Magnesium

C Lead

D Iron

View Answer

Answer: Lead

32 Which of following is not an essential micronutrient

A Boron

B Nickel

C Manganese

D Molybdenum

View Answer

Answer: Nickel

33 Plants absorb mineral salts from the soil solution through

A Semipermeable membrane into the cytoplasm

B Perforation at the apex of root-hairs only

C The cell wall which is semipermeable

D None of the above

View Answer

Answer: Semipermeable membrane into the cytoplasm

34 Minerals absorbed by roots move to the leaf through

A Xylem

B Phloem

C Sieve tubes

D None of the above

View Answer

Answer: Xylem

35 The raw material most used by the plants is

A O2

B CO2

C N2

D K

View Answer

Answer: CO2

36 A fertilizer has a formula of three figures 15-9-9. They stand for percentage of

A N, Ca and Mg

B Mg, P and K

C Ca, N and Fe

D N, P and K

View Answer

Answer: N, P and K

37 Whiptail of crucifers is due to deficiency of

A Mo

B Cu

C Zn

D P

View Answer

Answer: Mo

38 Little leaf/leaf rosetting is deficiency symptom of

A Zn

B Mn

C Fe

D B

View Answer

Answer: Zn

39 Aeroponics is growing plants in

A Air

B Satellites

C Other planets and space

D Stands with liquid spray of their roots

View Answer

Answer: Stands with liquid spray of their roots

40 major function of phosphorus is in the formation of

A Cell membranes

B Cell wall

C Enzymes

D Carbohydrates

View Answer

Answer: Cell membranes

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