Tag: transport in plants

Questions Related to transport in plants

Choose the correct answer from the alternatives given.
Minerals are absorbed in:

biology transport in plants diffusion transport in vascular plants types of transport

  1. meristematic zone

  2. root hair zone

  3. elongation zone

  4. root cap zone

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Correct Option: C
Explanation:

Plants absorb their mineral salt supply from the soil through the roots from the zones of elongation and root hair. The minerals are absorbed as ions which are accumulated by the plants against their concentration in the soil.

So, the correct option is, 'Elongation zone'.

Choose the correct answers from the alternatives given.
The energy source that drives the upward flow of water is

biology transport in plants diffusion transport in vascular plants types of transport

  1. Light

  2. Glucose

  3. ATP

  4. Solar heat

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Correct Option: D
Explanation:

Solar heat causes the evaporation of water from the surface of the leaves in form of water vapour through small openings called stomata. This loss is known as transpiration. Due to the loss of water, water stress condition is created that forces the upward movement of water from the soil towards the shoot system. This water is then again distributed to various plant parts.

Hence, the correct answer is 'Solar heat'.

The major source of minerals in the soil is

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Parent rock from which soil is formed

  2. Plants

  3. Animals

  4. Decomposers

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Correct Option: A
Explanation:

The absorption, distribution and metabolism of various mineral elements by plants are called mineral nutrition. The mineral elements play important role in the performance and maintenance of life activities. All microelements are absorbed by plants in traces and derived from the parent rock by the process of weathering. 

So, the correct answer is option A.

Nutrient which are required in small quantities are called as

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Macronutrients

  2. Micronutrients

  3. Primary nutrients

  4. None of the above

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Correct Option: B
Explanation:

A nutrient which is required in small quantities is called as a micronutrient. The micronutrients are boron, chlorine, copper, iron, manganese, molybdenum and zinc. These plant food elements are used in very small amounts, but they are just as important to plant development and profitable crop production as the major nutrients. Especially, they work "behind the scene" as activators of many plant functions.

Thus, the correct answer is 'Micronutrients'.

Ammonium sulphate is a

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Pesticide

  2. Weedicide

  3. Fertilizer

  4. Tonic chemical

Show answer
Correct Option: C
Explanation:

Ammonium sulfate is a fertilizer as it increases the fertility of soil and plants can use it for their functions.

It cannot kill pests or weeds and hence is not a pesticide or a weedicide.
Tonic chemicals are medicines given to feel vigour. Ammonium sulfate has no such function.
So the correct answer is 'Fertilizer'.

Active transport of ions by the cell requires

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. High temperature

  2. ATP

  3. Alkaline pH

  4. Salts

Show answer
Correct Option: B
Explanation:

Whenever active transport is being carried out energy is required and ATP is used up as it is the energy currency of the cell.

High temperature, Alkaline pH or Salts cannot carry out active transport as it involves movement of a substance against it's concentration gradient.
So, the correct answer is 'ATP'

Active transport from outside to inside of molecules across a membrane requires

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Cyclic AMP

  2. ATP

  3. Phloroglucinol

  4. Acetyle chloine

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Correct Option: B
Explanation:

The active transport of substances require energy and hence they use up ATP which is the energy currency of the cell.

Acetly choline and Cyclic AMP are involved in cell signalled.
Phloroglucinol is a stain used to observe lignin.
So the correct answer is 'ATP'.

Select the correct statement regarding "A trace element is an element which".

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Is a radio active and can be traced by Geiger counter.

  2. Is required in very minute amounts.

  3. Draws other element out of protoplasm.

  4. Was one of the first to be discovered in protoplasm.

Show answer
Correct Option: B
Explanation:

Trace elements are the ones which are required in. Very less amount and are present in less amounts as compared to other elements of major use.

Usually, they have very specific functions and do not contribute structurally.
Macronutrients were discovered first in the cytoplasm.
Radioactive elements are usually not present in the plant bodies.
So the correct answer is 'Is required in very minute amounts'.

In the root nodules of legumes, leghaemoglobin is important because it

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Transports oxygen to the root nodule.

  2. Acts as an oxygen scavenger.

  3. Provides energy to the nitrogen fixing bacterium.

  4. Acts as a catalyst in transamination.

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Correct Option: B
Explanation:

The root nodule bacterium is microaerobic in the sense that it requires oxygen but the high concentration of oxygen is detrimental to nitrogen-fixing enzyme system. Here leghaemoglobin proves beneficial, it absorbs or binds oxygen so that there is no free oxygen left in the nodule and then carries micro-amounts of oxygen to the nodule bacteroids. Thus the correct answer is option B.

Brown heart disease is due to the deficiency of

biology transport in plants transport of food, water and minerals theories of translocation transport in the phloem of plants

  1. Boron.

  2. Iron.

  3. Molybdenum.

  4. Phosphorus.

Show answer
Correct Option: A
Explanation:

Boron regulates pentose phosphate pathway, increases sugar translocation in plants. Due to deficiency of boron growth of roots stops and the disease ' brown heart' is caused in sugarbeet. Thus option A is the correct answer.