Biology

Plant Transport and Physiology

1,834 Questions

Access a comprehensive set of questions on plant transport mechanisms and physiological adaptations. Topics include water movement, translocation of food, and plant responses to external stimuli. These biology questions are essential for medical entrance exams and other science competitive tests.

Xylem and phloem transportTranspiration and evaporationPlant adaptationsGeotropic and phototropic responsesWater absorption by rootsRespiration in roots

Plant Transport and Physiology Questions

Multiple choice

Plant bleeding refers to

  1. secretion of red liquid from cuts in plant

  2. secretion of watery sap from injured plant

  3. exudation of water in the form of droplets from the margin of leaves

  4. excessive loss of water from the plants leading to water deficit
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Plant bleeding refers to secretion of watery sap from injured plant.

Multiple choice

An increase in root/shoot ratio results in

  1. increase in rate of transpiration.

  2. decrease in rate of transpiration

  3. increase in rate of absorption

  4. increase the rate of photosynthesis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A high root/shoot ratio increase the rate of transpiration.

Multiple choice

What is the name of the substance present in the leaves of the plant that enables them to prepare food?

  1. Stomata

  2. Chlorophyll

  3. Starch

  4. Carbohydrate

  5. Protein
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Chlorophyll is a green pigment found in plants. It is often described as the 'green blood of plants. It plays a crucial role in producing food for green plants by synthesising simple sugars (glucose) from carbon dioxide and and water in the process of photosynthesis. 

Multiple choice

Which of the following statements about plants is true?

  1. Plants do not show movement.

  2. Plants cannot make their own food.

  3. Some plants reproduce by giving birth to young plants.

  4. Plants release oxygen during the process of photosynthesis.

  5. Plants breath through the process of respiration.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

During the process of photosynthesis, plants release oxygen into the air. Plants use carbon dioxide, which they get from their leaves and water, from the roots and sunlight which they get from the sun in order to photosynthesise. The process of photosynthesising is when the plant uses its chlorophyll (that is what makes plants green) to change water, sunlight and carbon dioxide.

Multiple choice

During cell enlargement phase of growth, molecules of new cell wall material are inserted between the original molecules of stretched wall. This process is known as ____________.

  1. integration

  2. nutation

  3. Intus-susception

  4. guttation

  5. hydration
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

During cell enlargement phase of growth, molecules of new cell wall material are inserted between the original molecules of stretched wall. This process is known as intus-susception.

Multiple choice

Diffusion is a means of transport in plants. Which of the following is not a property of diffusion?

  1. In diffusion, no energy expenditure takes place.

  2. Molecules move in a random pattern.

  3. Movement by diffusion is passive.

  4. Diffusion is a very fast process.

  5. The rate of diffusion is affected by temperature and pressure.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option as this is not a property of diffusion. Diffusion is a slow process.

Multiple choice

Which of the following statements is/are false?

a. In rooted plants, the transport in xylem is multidirectional. b. Special proteins help moving substances across membranes without expenditure of ATP energy in facilitated diffusion. c. In active as well as passive transport, a major role is played by different proteins in the membrane.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct option as this statement is false. In rooted plants, the transport in xylem is unidirectional, i.e. from roots to the stems.