Tag: botany

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Questions Related to botany

Multiple choice botany transport in plants osmotic relations of plant cells transport across membrane imbibition and its importance

Imbibition occurs due to?

  1. Increase in volume of imbibate

  2. Adsorption of imbibate by imbibant

  3. Absorption of imbibant by imbibate

  4. Loss of energy in the form of heat
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Imbibition is a special type of diffusion when water is absorbed by solids and colloids causing an enormous increase in volume. The substance that imbibes water is called imbibant, and the liquid which is imbibed is called imbibate. Imbibition occurs due to the increase in the volume of imbibate.

 Hence, the correct answer is option A.
Multiple choice botany transport in plants osmotic relations of plant cells transport across membrane imbibition and its importance

Which of the following statements is correct?

  1. Cells shrink in hypertonic solution and swell in hypotonic solution.

  2. Imbibition is a special type of diffusion when water is absorbed by no living parts.

  3. Most of water flow in the roots occur via the apoplast.

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Following are the correct statements: 

(1) Cells shrink in a hypertonic solution and swell in the hypotonic solution.
(2) Imbibition is a special type of diffusion when water is absorbed by no living parts.
(3) Most of the water flow in the roots occur via the apoplast.
So, the correct answer is (d).

Multiple choice botany transport in plants osmotic relations of plant cells transport across membrane imbibition and its importance

The principle used in pickling is

  1. Imbibition

  2. Endosmosis

  3. Plasmolysis

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Pickling involves adding high concentrations of salt or sugar to food items like vegetables or meat. This creates a hypertonic environment outside the microbial cells, causing water to move out of the cells via osmosis, leading to plasmolysis. As a result, microbes lose water, shrivel, and are unable to grow or spoil the food.

Multiple choice botany transport in plants osmotic relations of plant cells transport across membrane imbibition and its importance

Absorption of water from soil by seeds increases the _________ thus helping seedlings to come out of soil.

  1. DPD

  2. Diffusion pressure

  3. Imbibition pressure

  4. Solute potential
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Imbibition is the initial step in the germination of the seeds. When mature seeds are sown in soil they imbibe water and swell. The water is imbibed first by seed coat and then by other tissues of embryo and endosperm. The process of imbibition is important ot initiate the seed germination. the pressure that an imbibant develops when submerged in pure imbibing liquid is called imbibition pressure.

Multiple choice botany transport in plants osmotic relations of plant cells transport across membrane imbibition and its importance

The practice of breaking of rocks during rainy season by inserting wooden pegs in them is based on the phenomenon of ______________.

  1. Imbibition pressure

  2. Turgor pressure

  3. Osmotic pressure

  4. Wall pressure
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Imbibition pressure generated during germination of seeds and spores is so enormous that it can break asphalt roads and concrete pavements. In older times, the imbibition pressure was used in breaking the rocks and stones. Dry wooden stakes, if driven into a small crack in a rock and then soaked, can develop enough pressure to split the rock.

Multiple choice botany transport in plants osmotic relations of plant cells transport across membrane imbibition and its importance

Choose the correct answers from the alternatives given.
The first process by which water enters into the seed coat when a seed is placed in a suitable situation for germination is

  1. Root pressure

  2. Absorption

  3. Osmosis

  4. Imbibition
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Imbibition is the process of absorption of water by hydrophilic solid particles. It is a special type of diffusion as the water moves along its concentration gradient. The classical example includes the absorption of water by seeds. This process plays an important role in the germination of seed, rupturing of the seed coat, and the emergence of seedlings is due to imbibition pressure developed by the seed kernel.

Hence, the correct answer is 'Imbibition'.

Multiple choice botany transport in plants osmotic relations of plant cells transport across membrane imbibition and its importance

The uniformly sweet taste of coffee or tea is due to

  1. Spreading

  2. Permeability

  3. Distribution

  4. Diffusion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Coffee and tea tastes uniformly sweet due to the diffusion of solvent from the high concentration to the lower concentration. There is no membrane and it is not the case of osmosis and permeability.

So the correct optoin is D.

Multiple choice botany transport in plants osmotic relations of plant cells transport across membrane imbibition and its importance

Essence of environmental sciences involve:

  1. Social aspect

  2. Political aspect

  3. Economic aspect

  4. All of above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Environmental science is an interdisciplinary field that integrates physical, biological, and information sciences, along with social, political, and economic aspects to study environmental problems.

Multiple choice botany photosynthesis cam cycle cam plants photosynthetic cycle

An example of CAM plant is

  1. Black Nightshade (Solanum nigrum)

  2. Lemon Grass (Cymbopogon flexuosus)

  3. Sugarbeet (Beta vulgaris)

  4. Snake Plant (Sanseveria trifasciata)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Certain plants which have Crassulacean Acid Metabolism (CAM) are known as CAM plants. They have scotoactive stomata. It means their stomata remain open during the night. It is the characteristic feature of CAM plants. These plants fix carbon dioxide during the night but form sugars only during the day when RuBisCO is active. Sedum, Kalanchoe, Pineapple, Opuntia, Snake plant are the examples of CAM plants. These plants also perform double carbon dioxide fixation. The carbon dioxide acceptor in CAM plants is Phosphoenol pyruvic acid (PEP) during the night and Ribulose bisphosphate is carbon dioxide acceptor during the daytime. The first stable product in case of CAM plants is Oxalo acetic acid (OAA).

Multiple choice botany photosynthesis cam cycle cam plants photosynthetic cycle

In CAM plants, $CO _2$ required for photosynthesis enters the plant body during

  1. Daytime when the stomata are open.

  2. Night when the hydathodes are open.

  3. Daytime through the lenticels.

  4. Nights through the stomata which are kept open.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

CAM plants are those plants whose stomata open at night so that they can fix carbon-dioxide in the form of organic acids because these plants are adapted to grow in arid conditions. They accumulate carbon dioxide at night in vacuoles whereas in day time malic acid in transported to chloroplasts where it is again converted into carbon dioxide for photosynthesis. 

Thus, the correct answer is option D.