Test Type: MCQs (Multiple Choice Questions), Total Questions 15, Test Name: Transport in Plants – Test 01
Transport in Plants: MCQs Test - 1
Congratulations - you have completed Transport in Plants: MCQs Test - 1.
You scored %%SCORE%% out of %%TOTAL%%.
Your performance has been rated as %%RATING%%
Your answers are highlighted below.
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. |
Once you are finished, click the button below. Any items you have not completed will be marked incorrect.
There are 15 questions to complete.
pls tell me d reason of 11
Bcz water moves frm low OP to High OP
Bcoz water move from high water potential to low and root hair has the max. Water potentiaçl
Nice question
Superb questions !!! Pls try to give this type of question