Transport in Plants Test

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Transport in Plants Test - 24

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Weekly Quiz Competition

Question 1
1 / -0

Nobel prize in 1991 for discovering the single ion channels in cell was awarded to

A
Waston and Har gobind Khorana

B
Erwin Neher and Bert Sakmann

C
Nirenberg and Kornberg

D
Holley and Matthaei

Solution

In 1991, the Nobel prize in medicine or physiology was given to Erwin Neher and Bert Sarkmann for the discovery of single ion channels in cells. They were able to develop a technique that registers very minute variations in electric currents that passes through a single ion channel. This new method helped them to watch the activity of a single molecule.
Thus, the correct answer is option B.
Question 2
1 / -0

Which of the following shows that metabolic energy is required in the absorption of ions

A
More ions absorption in presence of oxygen

B
Less absorption of ions in presence of oxygen

C
More ions absorption in presence of ATP

D
More ions absorption in presence of NAD

Solution

The absorption of ions, involving use of metabolic energy is called active absorption. Energy is generally obtained from ATP.Therefore active absorption is linked to hydrolysis of ATP
Question 3
1 / -0

Following are a few definitions of osmosis. Read carefully and select the correct definition.

A
Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane.

B
Movement of solvent molecules from its higher concentration to lower concentration.

C
Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane.

D
Movement of solute molecules from lower concentration to the higher concentration of solution through a semipermeable membrane.

Solution

Osmosis is movement of solvent molecules of a solution from their higher concentration to their lower concentration across a semi-permeable membrane.
Question 4
1 / -0

The translocation of organic solutes in sieve tube members is supported by-

A
Root pressure and transpiration pull

B
P-proteins

C
Mass flow involving a carrier and ATP

D
Cytoplasmic streaming

Solution

According to mass flow hypothesis the transport of organic solutes takes place from source to sink, this transport also depends on metabolic energy. According to cytoplasmic strearming hypothesis (which was given by de Vries, 1885) the transport of organic solutes takes place by combination of diffusion and cytoplasmic streaming. Cytoplasmic streaming carry organic solutes from one and to the other end of sieve tube. P-proteins has a role as defence against phloem feeding insects and sealing of damaged sieve tubes.

So, the correct answer is 'Mass flow involving a carrier and ATP'.
Question 5
1 / -0

Subhash puts 10 g of raisin in 100 mL of distilled water at $$20^{\circ}$$ C. Anurag puts the same amount of raisins in 100 mL of distilled water at $$40^{\circ}$$ C After an hour, percentage of water absorbed by raisins will be -

A
Same in both cases.

B
More in Subhash's beaker.

C
More in Anurag's beaker.

D
Exactly twice in Anurags beaker as compared to in Subhash's beaker.
Question 6
1 / -0

While performing an experiment with raisins a student recorded the following
observations :
Mass of water taken in the beaker $$=$$ 30g
Mass of raisins before soaking $$=$$ 7g
Mass of raisins after soaking water $$=$$ 10g
Mass of water left in the beaker after experiment $$=$$ 25g
On the basis of these observations the percentage of water absorbed by raisins is :

A
$$\frac{(30-25)g}{30 g}\times 100$$

B
$$\frac{(30-25)g}{25 g}\times 100$$

C
$$\frac{(10-7)g}{7 g}\times 100$$

D
$$\frac{(10-7)g}{10 g}\times 100$$
Question 7
1 / -0

Why is transpiration important for plants?

A
It provides essential $$CO_2$$ needed for photosynthesis.

B
It helps in absorption and upward movement of water and minerals.

C
It prevents the plant parts from heating up.

D
Both B and C.

Solution

Transpiration is important because:
a) It helps in the absorption and upward movement of water and minerals from roots to leaves.
b) It prevents the plant parts from heating up as the water released provides a cooling effect on the plant.
Therefore, the correct answer is option D.
Question 8
1 / -0

Ten raisins each were taken in Petri dishes, X and Y. X contained ice cold water while
Y contained distilled water at room temperature. After two hours the raisins in each
case were weighed again. The expected observation is :

A
Raisins weighed more in case of X

B
Raisins weighed more in case of Y

C
They weighed the same in both the cases

D
Raisins in case of X did not show a change in weight.
Question 9
1 / -0

To determine the percentage of water absorbed by raisins, the step which must not be
followed by student is :

A
raisins should be clean

B
soaked raisins to be dried by rubbing them with a cloth

C
gently dry the soaked raisins with the help of filter paper

D
raisins to be completely immersed in water
Question 10
1 / -0

Following five steps are generally followed in the experiment on determining the
percentage of water absorbed by raisins. However these steps are not in proper sequence
(1) Measure the mass of dry raisins
(2) Measure the mass of soaked raisins
(3) Take a clean beaker and put dry raisins in it.
(4) Pour water into the beakers so that the raisins are dipped
(5) After about 90 minutes remove soaked raisins from the beaker and wipe them with filter paper.
The correct sequence of these steps is :

A
1, 2, 3, 5, 4

B
1, 3, 4, 5, 2

C
3, 1, 4, 5, 2

D
3, 1, 5, 4, 2

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Re-Attempt Weekly Quiz Competition

Transport in Plants Test - 24

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Transport in Plants Test - 24

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SHARING IS CARING

Question 1

Waston and Har gobind Khorana

Erwin Neher and Bert Sakmann

Nirenberg and Kornberg

Holley and Matthaei

Solution

Question 2

More ions absorption in presence of oxygen

Less absorption of ions in presence of oxygen

More ions absorption in presence of ATP

More ions absorption in presence of NAD

Solution

Question 3

Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane.

Movement of solvent molecules from its higher concentration to lower concentration.

Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane.

Movement of solute molecules from lower concentration to the higher concentration of solution through a semipermeable membrane.

Solution

Question 4

Root pressure and transpiration pull

P-proteins

Mass flow involving a carrier and ATP

Cytoplasmic streaming

Solution

Question 5

Same in both cases.

More in Subhash's beaker.

More in Anurag's beaker.

Exactly twice in Anurags beaker as compared to in Subhash's beaker.

Question 6

$$\frac{(30-25)g}{30 g}\times 100$$

$$\frac{(30-25)g}{25 g}\times 100$$

$$\frac{(10-7)g}{7 g}\times 100$$

$$\frac{(10-7)g}{10 g}\times 100$$

Question 7

It provides essential $$CO_2$$ needed for photosynthesis.

It helps in absorption and upward movement of water and minerals.

It prevents the plant parts from heating up.

Both B and C.

Solution

Question 8

Raisins weighed more in case of X

Raisins weighed more in case of Y

They weighed the same in both the cases

Raisins in case of X did not show a change in weight.

Question 9

raisins should be clean

soaked raisins to be dried by rubbing them with a cloth

gently dry the soaked raisins with the help of filter paper

raisins to be completely immersed in water

Question 10

1, 2, 3, 5, 4

1, 3, 4, 5, 2

3, 1, 4, 5, 2

3, 1, 5, 4, 2

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