Tag: long distance transport of water

Questions Related to long distance transport of water

Which one of the following helps in the upward movement of water and dissolved minerals from the roots to the leaves through the stem ?

botany breath and blood of life stomata and transpiration transport in organisms long distance transport of water different types of circulatory systems

  1. translocation

  2. transportation

  3. transpiration

  4. transaction

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Correct Option: C
Explanation:

The continuous evaporation of water (or transpiration) from the cells of a leaf crates a kind of suction which pulls up water through the xylem vessles. Thus, transpiration helps in the upward movement of water and dissolved minerals from the roots to the leaves through the stem.

The process in which loss of water occurs in the form of water vapour is

botany breath and blood of life stomata and transpiration transport in organisms long distance transport of water different types of circulatory systems

  1. Respiration

  2. Guttation

  3. Transpiration

  4. Exosmosis

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Correct Option: C
Explanation:
Respiration  is a process in which living organisms produces energy, with the intake of oxygen and the release of carbon dioxide from the oxidation of complex organic substances.
Guttation is the loss of water in the form of water droplets from hydathodes (small pores) on the leaf margin of a plant.
Transpiration is the process where plants absorb water through the roots and then give off water vapor through pores in their leaves.
The passage of material through a semi-permeable membrane from a region of higher to a region of lower concentration, especially the passage of water through a cell membrane into the surrounding medium, is called exosmosis. 
Thus, the correct answer is option (C). 

A leafy twig of mesophytic plant dipped in water would demonstrate 

botany breath and blood of life stomata and transpiration transport in organisms long distance transport of water different types of circulatory systems

  1. Photosynthesis

  2. Transpiration

  3. Respiration

  4. Gutttation

Show answer
Correct Option: B
Explanation:
Mesophytic plants are the plants which grow in the areas/lands which is not too dry not too wet.
When this type of plant is dipped in water (making hydrophytic) then it will demonstrate transpiration More will be the amount of water and more will be the transpiration rate.
Biochemical processes like photosynthesis, respiration and guttation do not depend upon the nature of land but transpiration depends upon the amount of water present in the soil.
So, the correct answer is 'Transpiration'.

Ascent of sap is best explained by.

botany water absorption and ascent of sap in plants factors affecting the transport of water and minerals in plants ascent of sap long distance transport of water

  1. Mass (bulk) flow

  2. Pulsation theory

  3. Root pressure

  4. Cohesion-tension transpiration pull

Show answer
Correct Option: D
Explanation:

The cohesion-tension theory is a theory of intermolecular attraction that explains the process of water flow upwards (against the force of gravity) through the xylem of plants. Transpiration pull, utilizing capillary action and the inherent surface tension of water, is the primary mechanism of water movement in plants.
Answer is D.

the major driving force in the movement of water in the xylem is 

botany water absorption and ascent of sap in plants factors affecting the transport of water and minerals in plants ascent of sap long distance transport of water

  1. Osmotic pressure

  2. gravitational pull

  3. transpiration pull

  4. Diffussion pressure

Show answer
Correct Option: C
Explanation:
The movement of water in the xylem is explained by the cohesion-tension theory. According to this theory, the water moves up in the xylem via the force of transpiration which is created because of the evaporation of water from the leaves of the plant.

So, the correct answer is 'transpiration pull'.

Read the following statements regarding transaction and select the correct option
I. Transpiration is the loss liquid droplets from the plant
II. Low atmospheric pressure inhibits transpiration
III. Transpiration maintains the shape and structure of plant parts
IV. Cuticular transpiration takes place only during day time

botany water absorption and ascent of sap in plants factors affecting the transport of water and minerals in plants ascent of sap long distance transport of water

  1. I &II only

  2. I, II &III only

  3. III only

  4. None of the statements are true

Show answer
Correct Option: D
Explanation:
  • The process of loss of water from the aerial part of the plant in the form of vapor is known as transpiration.
  • It is of three types:-
(i) Cuticle transpiration (loss of water from cuticles),
(ii)Lenticular transpiration (loss of water from lenticels)
(iii)Stomatal transpiration (loss of water from stomata)
  •  Atmospheric pressure, humidity, and temperature are some factor that affects transpiration.
So, the correct option is 'None of the statements are true'.

Which of the following sequence is completely cryptoanalysed?

botany water absorption and ascent of sap in plants factors affecting the transport of water and minerals in plants ascent of sap long distance transport of water

  1. AUG UCG GAG UAA UUU UGA

  2. AUG UUG UGG GAG UCA UAG

  3. GUG UCG UGA AAG UAU UGA

  4. AUG AAU GCU GUT UAC UAA

Show answer
Correct Option: D
Explanation:

The sequence that can be cryptoanalyzed/ all the codons code for proteins will be devoid of any stop codons. 

Since all the other sequences except AUG AAU GCU GUT UAC UAA can code for proteins without intermediate termination, it can be completely cryptoanalyzed.
So, the correct option is 'AUG AAU GCU GUT UAC UAA'.

Read the following statements and identify the incorrect difference between transpiration pull and root pressure.

Transpiration pull Root pressure
$(1)$ Acts as main driving force for translocation of water in tall trees It establishes chain of water molecules in xylem of tall trees
$(2)$ Its magnitude is maximum during day time Its magnitude is maximum during early morning and night
$(3)$ It generates a strong positive water potential in xylem It is a negative hydrostatic pressure developed in xylem
$(4)$ It is manifestation of passive water absorption It generates from active water absorption
botany water absorption and ascent of sap in plants factors affecting the transport of water and minerals in plants ascent of sap long distance transport of water

  1. $1$

  2. $2$

  3. $3$

  4. $4$

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Correct Option: A

A pressure that is responsible for pushing up water to small height in the stem is?

botany water absorption and ascent of sap in plants factors affecting the transport of water and minerals in plants ascent of sap long distance transport of water

  1. Positive root pressure

  2. Turgor pressure

  3. Pressure gradient

  4. Negative root pressure

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Correct Option: A

Match the columns.

Column I Column II
A. Semipermeable membrane $1$. Dixon and Jolly
B. Transpiration pull $2$. Manometer
C. Pulsation theory $3$. Holard
D. Root pressure $4$. JC Bose
E. Whole water content in soil $5$. Osmosis
botany water absorption and ascent of sap in plants factors affecting the transport of water and minerals in plants ascent of sap long distance transport of water

  1. A-$2$, B-$1$, C-$4$, D-$5$, E-$3$, F-$1$

  2. A-$5$, B-$1$, C-$4$, D-$2$, E-$3$, F-$1$

  3. A-$5$, B-$4$, C-$1$, D-$2$, E-$3$, F-$1$

  4. A-$1$, B-$1$, C-$2$, D-$4$, E-$3$, F-$5$

Show answer
Correct Option: A