Test Type: MCQs (Multiple Choice Questions), Total Questions 15, Test Name: Transport in Plants – Test 01
Transport in Plants: MCQs Test - 1
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Question 1 |
In a plant organ, which is covered by periderm and the stomata are absent, some gaseous exchange still takes place through
pneumatophores | |
trichomes | |
aerenchyma | |
lenticels |
Question 2 |
The carbohydrates synthesized in the leaves are transported through sieve tubes most commonly in the form of
glucose | |
triose sugar | |
sucrose | |
soluble starch |
Question 3 |
Phenylmercuric acetate
reduces transpiration rate | |
reduces photosynthesis | |
reduces respiration | |
kills the plant |
Question 4 |
The amount of water held by the soil after drainage is known as
Mineral water | |
Soil water | |
Field capacity | |
Gravitational capacity |
Question 5 |
In soil, water available for plants is
Capillary water | |
Hygroscopic water | |
Gravitational water | |
Chemically bound water |
Question 6 |
Turgidity of the cells is maintained by
osmotic pressure | |
wall pressure | |
turgor pressure | |
diffusion pressure |
Question 7 |
Wilting of a plant results from excessive
respiration | |
photosynthesis | |
absorption | |
transpiration |
Question 8 |
The phytohormone, which increases the concentration of potassium in guard cells is also responsible for the induction of
Cell division | |
Triple response growth | |
Apical dominance | |
Abscission |
Question 9 |
Potometer works on the principle of
Osmotic pressure | |
Amount of water absorbed equals the amount transpired | |
Potential difference between the tip of the tube and that of the plant | |
Root pressure |
Question 10 |
According to Steward’s starch hydrolysis theory, which one of the following is the principal reason for the opening of stomata during daytime?
Photosynthetic utilization of CO2 in guard cells. | |
Influx of K+ ions into guard cells under the influence of ABA hormone. | |
Conversion of sugar into starch in guard cells. | |
Efflux of K+ ions from guard cells under the influence of ABA hormone. |
Question 11 |
The osmotic potential and pressure potential of three cells (A, B, C) located in different parts of an actively transpiring plant are given below:
Identify these three cells as root hair, root cortical and leaf mesophyll cells respectively. The correct answer is.
| Cell | Osmotic Potential (MPa) | Pressure Potential (MPa) |
| A | – 0.87 | 0.44 |
| B | – 0.92 | 0.34 |
| C | – 0.68 | 0.27 |
C, A, B | |
A, C, B | |
A, B, C | |
B, C, A |
Question 12 |
A leaf peeling of Tradescantia is kept in a medium having 10% NaCl. After a few minutes if we observe the leaf peel under the microscope, we are likely to see
Entry of water into the cell | |
Exit of water from the cell | |
Diffusion of NaCl into the cell | |
The cells bursting out |
Question 13 |
Study the following table showing the components of water potential in closely arranged mesophyll cells namely A, B and C.
Identify two of the following which show correct direction of water movement between two cells. I. A → B, II. B → C, III. C → A, IV. C → B The correct pair is
| Cell | Osmotic Potential (MPa) | Pressure Potential (MPa) |
| A | – 0.21 | 0.05 |
| B | – 0.22 | 0.02 |
| C | – 0.23 | 0.05 |
I, II | |
II, III | |
I, IV | |
II,IV |
Question 14 |
Two cells A and B are contiguous. Cell A has osmotic pressure 10 atm, turgor pressure 7 atm and diffusion pressure deficit 3 atm. Cell B has osmotic pressure 8 atm, turgor pressure 3 atm and diffusion pressure deficit 5 atm. The result will be:
No movement of water | |
Movement of water from cell B to A | |
Movement of water from cell A to B | |
Equilibrium between the two |
Question 15 |
Assertion: When dried seeds of pea are placed in a tin and water added up to their upper level and then a lid is put lightly over it. Within an hour, the lid will be blown off.
Reason: Due to rapid cell division in pea seeds.
Both Assertion and Reason are true and Reason is the correct explanation of the Assertion. | |
Both Assertion and Reason are true but the Reason is not the correct explanations of Assertion. | |
Assertion is true, but Reason is false. | |
Both Assertion and Reason are false. |
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There are 15 questions to complete.
pls tell me d reason of 11
Bcz water moves frm low OP to High OP
Just calculate the water potential by
Water pot. =Osmotic pot. (Solute pot.) +Pressure pot.
Root hair has highest and leaf mesophyll cell has lowest water potential.
A. -43Mpa
B. -58Mpa
C. -41Mpa
So. Root hair=C(highest wp)
Root cortical=A(moderate)
Leaf mesophyll=B(lowest wp)
Bcoz water move from high water potential to low and root hair has the max. Water potentiaçl
Just calculate the water potential by
Water pot. =Osmotic pot. (Solute pot.) +Pressure pot.
Root hair has highest and leaf mesophyll cell has lowest water potential.
A. -43Mpa
B. -58Mpa
C. -41Mpa
So. Root hair=C(highest wp)
Root cortical=A(moderate)
Leaf mesophyll=B(lowest wp)
Nice question
Superb questions !!! Pls try to give this type of question