R4RIN – MCQs, Mock Tests | Botany Botany MCQS[NEET-2021 to 2022]-Transport and Mineral Nutrition in Plants

The water readily available to plants for absorption by roots is

1. Gravitational water
2. Capillary water
3. Rain water
4. Hygroscopic water

✅ Correct Answer: 2

The water potential of pure water at atmospheric pressure is

1. -2.3 bar
2. +2.3 bar
3. Zero bar
4. One bar

✅ Correct Answer: 3

Loss of water from the stomata of leaves are known as

1. Guttation
2. Exudation
3. Transpiration
4. Evaporation

✅ Correct Answer: 3

During rainy season wooden doors are difficult to open or closure because of

1. Plasmolysis
2. Imbibition
3. Osmosis
4. Diffusion

✅ Correct Answer: 2

Plasmolysis occurs due to

1. Absorption
2. Osmosis
3. Endoosmosis
4. Exosmosis

✅ Correct Answer: 4

The marine animals that kept in fresh water burst. It shows the process of

1. Exosmosis
2. Endoosmosis
3. Plasmolysis
4. Deplasmolysis

✅ Correct Answer: 2

Cooling of plants is caused by

1. Guttaion
2. Photorespiration
3. Transpiration
4. Assimilation

✅ Correct Answer: 3

Active uptake of minerals by roots mainly depends on the

1. Availability of oxygen
2. Light
3. Temperature
4. Availability of CO2

✅ Correct Answer: 1

The hormone which signals the closure of stomata is

1. Auxins
2. Cytokinine
3. Gibberelline
4. Abscisic acid

✅ Correct Answer: 4

Water absorption takes place through

1. Lateral roots
2. Root cap
3. Root hairs
4. Tap root

✅ Correct Answer: 3

Which of the following is an anti-transpirant

1. PMA
2. PAN
3. IAA
4. AUG

✅ Correct Answer: 1

What is the action spectrum of transpiration?

1. Orange and red
2. Green and ultraviolet
3. Blue and red
4. None of these

✅ Correct Answer: 3

Which one of the following is used for measuring the rate of transpiration?

1. Porometer
2. Osmometer
3. Molls experiment
4. Potometer

✅ Correct Answer: 4

Transpiration is least in

1. High atmospheric humidity
2. high wind velocity
3. good soil moisture
4. dry environment

✅ Correct Answer: 1

Stomata open at night and close during day time in

1. Mesophytes
2. Xerophytes
3. Succulents
4. Hydrophytes

✅ Correct Answer: 3

Which of the following is necessary for biological nitrogen fixation?

1. Zinc
2. Copper
3. Manganese
4. Molybdenum

✅ Correct Answer: 4

The essential element for the synthesis of auxin is

1. Zinc
2. Sulphur
3. Potassium
4. Phosphorus

✅ Correct Answer: 1

The disease die back of shoots is caused due to the deficiency of the following microelements

1. Chlorine
2. Copper
3. Manganese
4. Molybdenum

✅ Correct Answer: 1

Little leaf disease is due to the deficiency of

1. Nitrogen
2. Zinc
3. Manganese
4. Molybdenum

✅ Correct Answer: 2

Hydroponics is

1. Growing of aquatic plants
2. Soilless cultivation of plants
3. Growing off floating aquatic plants
4. Growing of plants inside water

✅ Correct Answer: 3

Molybdenum is involved in plant metabolism in

1. Translocation of solutes
2. Tryptophan synthesis
3. ABA synthesis
4. Nitrate reduction

✅ Correct Answer: 4

Plant require Fe and Mg for

1. Synthesis of chlorophyll
2. Opening and closing of stomata
3. Translocation of carbohydrates
4. None of these

✅ Correct Answer: 1

Plant absorb the element nitrogen in the form

1. nitrogen gas
2. nitrites
3. nitrates
4. nitric acid

✅ Correct Answer: 3

Bacteroid means

1. dead bacteria
2. living bacteria
3. A bacteria like substance
4. living bacteria but cannot divide

✅ Correct Answer: 2

Which of the following bacterium brings about denitrification?

1. Pseudomonas
2. Rhizobium
3. Azotobacter
4. Nitrobacter

✅ Correct Answer: 1

Ion can be accumulated against concentration gradient due to?

1. Active uptake
2. Mass flow
3. Passive uptake
4. Donnan equilibrium

✅ Correct Answer: 2

Which of the following is essential for Nitrogen Fixation by leguminous plants?

1. Chlorophyll
2. Leghaemoglobin
3. Anthocyanin
4. Phycocyanin

✅ Correct Answer: 2

First experiments related to the method of hydroponics were done by

1. Knop
2. Sachs
3. Arnon
4. Hill

✅ Correct Answer: 2

The most widely accepted theory accepted to explain the translocation of carbohydrates in higher plants

1. Root pressure theory
2. Osmotic theory
3. Imbibition theory
4. Mass flow theory

✅ Correct Answer: 4

Which element is required for Nodulation in Legumes?

1. Fe
2. Mn
3. Mo
4. B

✅ Correct Answer: 3

Which one of the following theories for ascent of sap was proposed by eminent Indian scientist J. C Bose?

1. Pulsation theory
2. Transpiration Pull theory
3. Root pressure theory
4. Atmospheric pressure theory

✅ Correct Answer: 1

Munch hypothesis is based on

1. Translocation of food due to TP gradient and imbibitions force
2. Translocation of food due to turgor pressure (TP) gradient
3. Translocation of food due to imbibitions force
4. None of the above

✅ Correct Answer: 2

The first process by which water enters into the seed coat when a seed is placed in a suitable environment for germination is

1. Osmosis
2. Active transport
3. absorption
4. Imbibition

✅ Correct Answer: 4

Which of the following plant material, is an efficient water imbibant?

1. lignin
2. agar
3. pectin
4. cellulose

✅ Correct Answer: 2

Which of the following experiment is called physiological demonstration of osmosis?

1. Thistle funnel- whose mouth is tied with egg membrane
2. Thistle funnel- whose mouth is tied with parchment paper
3. bell jar experiment
4. potometer

✅ Correct Answer: 2

Water is lost in a liquid state in some plants through hydathodes. These hydathodes

1. Remain closed at night
2. Remain closed during day
3. Remain always open
4. Do not show any specificity in opening and closing

✅ Correct Answer: 3

Passive absorption of water by the root system is the result of

1. Forces created in the cells of the root
2. Increased respiratory activity in root cells
3. Tension on the cell sap due to transpiration
4. Osmotic force in the shoot system

✅ Correct Answer: 3

Which of the following helps in ascent of sap?

1. Root pressure
2. Transpiration
3. Capillarity
4. all of above

✅ Correct Answer: 4

The translocation of organic solutes in sieve tube members is supported by

1. cytoplasmic streaming
2. mass flow involving a carrier and ATP
3. P proteins
4. root pressure and transpiration pull

✅ Correct Answer: 3

Potometer works on the principle of

1. Osmotic pressure
2. Root pressure
3. Amount of water absorbed equals the amount transpired
4. potential difference between the tip of the tube and that of the plant.

✅ Correct Answer: 3

A nutritionally wild type organism, which does not require any additional growth supplement is known as

1. Phenotype
2. Holotype
3. Prototroph
4. None

✅ Correct Answer: 3

Which one of the following is a micronutrient?

1. Boron
2. Molybdenum
3. Zinc
4. All

✅ Correct Answer: 4

The function of leghemoglobin in the root nodules of legumes is

1. Oxygen removal
2. Inhibition of nitrogenase activity
3. Expression of nif gene
4. None

✅ Correct Answer: 1

Which of the following is a bacterium involved in denitrification

1. Pseudomonas
2. Azotobacter
3. Nitrosomonas
4. Nitrobacter

✅ Correct Answer: 1

Which one of the following elements in plants is not remobilized ?

1. Sulphur
2. Calcium
3. Potassium
4. Phosphorus

✅ Correct Answer: 2

Which of the following is a rootless aquatic plant in which a portion of the leaf forms a tiny sac for trapping insects ?

1. Nepenthes
2. Drosera
3. Dionaea
4. Utricularia

✅ Correct Answer: 4

Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism

1. Cycas revoluta
2. Casuarina equisetifolia
3. Crotalaria juncea
4. Cicer arietinum

✅ Correct Answer: 2

The minerals involved in water-splitting reaction during photosynthesis are

1. Manganese and Chlorine
2. Magnesium Chlorine
3. Potassium and Manganese
4. Molybdenum Manganese

✅ Correct Answer: 1

If by radiation all nitrogenase enzyme are inactivated, then there will be no

1. Conversion from ammonium to nitrate in soil
2. Conversion from nitrate to nitrite in legumes
3. Fixation of nitrogen in legumes
4. Fixation of atmospheric nitrogen

✅ Correct Answer: 3

In root nodules of legumes, leg-haemoglobin is important because it

1. Transports oxygen to the root nodule
2. Acts as an oxygen scavenge
3. Provides energy to the nitrogen fixing bacterium
4. Acts as a catalyst in transamination

✅ Correct Answer: 2

Which of the following minerals activate the enzymes involved in respiration?

1. Magnesium and manganese
2. Nitrogen and phosphorus
3. Potassium and calcium
4. Sulphur and iron

✅ Correct Answer: 1

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

1. Magnesium
2. Lead
3. Iron
4. Calcium

✅ Correct Answer: 1

In plant nutrition elements are classified as major or minor depending on

1. Their relative production in the ash obtained after burning the plants
2. The relative amounts required by the plants
3. Their availability in the soil
4. Their relative importance in plant growth

✅ Correct Answer: 2

Non-essential element in plant is

1. Barium
2. Calcium
3. Magnesium
4. Potassium

✅ Correct Answer: 1

Which element has not been proved to be essential in plants

1. Calcium
2. Zinc
3. Iron
4. Sodium

✅ Correct Answer: 4

Plant ash is an indication of

1. Mineral salts absorbed by the plants
2. Only mineral salts
3. Organic matter of the plant
4. None

✅ Correct Answer: 2

An essential element is

1. Improve plant growth
2. Present in plant ash
3. Is indispensable for growth and is irreplaceable
4. Available in soil

✅ Correct Answer: 3

Hydroponics are

1. Growing of aquatic plants
2. Growing of floating aquatic plants
3. Growing of plants in sand
4. Growing of plants aqueous balanced nutrient

✅ Correct Answer: 4

How the mineral contents of the plant known

1. Calorimetric method
2. Ash analysis
3. Titrimetric method
4. All

✅ Correct Answer: 4

Necrosis means

1. Death of tissue and decomposition
2. Yellow spots on the leaves
3. Darkening of green colour in leaves
4. All

✅ Correct Answer: 1