Transport in Plants Test

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Transport in Plants Test - 67

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following is a food synthesising tissue?

A
Phloem

B
Sclerenchyma

C
Parenchyma

D
Aerenchyma
Solution
- Phloem is also called as bast.
- These tissues in plants conduct foods made in the leaves to all other parts of the plant.
- Phloem is composed of various specialized cells called sieve tubes, companion cells, phloem fibers, and phloem parenchyma cells.
- Hence, Phloem is a food synthesizing tissue.
So, the correct answer is option A.
Question 2
1 / -0

The value of pure water potential is

A
Always positive or more than zero

B
Always negative or less than zero

C
Always zero

D
Variable in different solution

Solution

Water potential is the kinetic energy in water molecules, due to which they rapid, constant and random motion. The more the concentration of water in a system the greater will be the Water potential. Thus pure water has the highest water potential and its never negative for any system.
So, the correct answer is 'Always positive or more than zero'.
Question 3
1 / -0

Complete the given table about absorption of nutrients through small intestine by selecting the correct option.
Process
Nutrients
Active transport III I and II Fructose and mannose
Simple Diffusion IV and V

A
$$I-$$Amino Acids,
$$II-Ca^{2+}$$,
$$III-$$Passive transport,
$$IV-$$Glycerol,
$$V-$$Fatty Acids

B
$$I-$$Galactose,
$$II-$$Amino Acids,
$$III-$$Passive transport,
$$IV-$$Vitamin C,
$$V-$$Water

C
$$I-$$Glucose,
$$II-$$Galactose,
$$III-$$Facilitated diffusion,
$$IV-$$Glycerol,
$$V-$$Water

D
$$I-$$Glucose,
$$II-$$Short chain fatty acids,
$$III-$$Facilitated diffusion,
$$IV-$$Water,
$$V-$$Vitamin B complex

Solution

* The absorption of digested food from the small intestine takes place by various methods;
* A small amount of glucose, amino acids, and some electrolytes like chloride ions are generally absorbed by simple diffusion.
* Fructose and some amino acids are absorbed with the help of the carrier ions like Na+. This mechanism is called the facilitated transport.
* Fatty acid and glycerols are absorbed in the form of micelle and chylomicrons.
* Transport of water depends upon the osmotic gradient.
Thus, the correct answer is option A.
Question 4
1 / -0

When a cell is placed in pure water then?

A
Wall pressure is increased

B
Turgor pressure is increased

C
Water potential of cell is increased

D
All the above

Solution

When cell is placed in pure water, the solute concentration inside the cell is greater than that of the outside, implies water concentration / potential is lower inside the cell i.e it is placed in a hypotonic medium.
So, water moves from outside to inside, from its higher potential to its lower potential. Thereby increasing the water potential of the cell.
Which leads to the increase in turgor pressure and therefore increase in wall pressure.
So, the correct answer is 'All of the above'
Question 5
1 / -0

At the sink, incoming sugars are passively transported................ the phloem.

A
towards

B
through

C
out of

D
into
Solution
- The mechanism by which sugars are transported through the phloem from the source to sink is called pressure flow.
- Sink is where sucrose is not synthesized but utilized and stored. The osmotic gradient is always higher in the phloem as compared to the sink so it is passively transported from phloem tissue to sink
- The correct answer is OPTION C.
Question 6
1 / -0

Some plants grow in the marshy saline areas show a unique adaptive response. They accumulate $$Na^+$$ and $$Cl^-$$ ions and transport them to the leaves. This phenomenon helps them to

(a) make $$\Psi_w$$ of leaves less negative
(b) reduce the transpirational loss of water
(c) increase the uptake of water via roots
(d) make the leaves more succulent

Select the correct option:-

A
(a) and (c)

B
(a) and (b)

C
(b) and (c)

D
(c) and (d)

Solution

If water potential becomes less negative, that is an increase in water potential, will eventually result in transpiration and loss of water for the plant. However active accumulation of ions will increase solute potential of the leaves, or make water potential more negative, preventing transpiration as well as increasing the uptake of water by roots So, the correct answer is '(b) and (c)'
Question 7
1 / -0

Which pressure is responsible for ascent of sap?

A
Negative hydrostatic pressure

B
Positive hydrostatic pressure

C
Root pressure

D
All of the above
Solution
In the Root Pressure, the root Xylem vessels absorb the minerals from the soil, as a result, the water potential outside the root increase and inside the root decreases so due to water potential difference water starts entering to the xylem of the root.
So, the correct answer is 'Root pressure'
Question 8
1 / -0

In passive transport, carrier protein is required to facilitate transport of

A
Neutral solutes

B
Hydrophobic molecules

C
Non polar molecules

D
Polar molecules

Solution

Plasma membrane is made of phospholipids, which allows the movement of neutral solutes. Polar molecules for example water requires carrier proteins as they are attracted towards the phopholipid heads (hydrophilic) of lipid bilayer while are repelled by the fatty acyl tail (hydrophobic) and hence cannot pass through the lipid bilayer that constitutes the plasma membrane.
So, the correct answer is 'Polar molecules'
Question 9
1 / -0

When pea seeds and wheat seeds are put in water, which of the two will imbibe more water?

A
Wheat seeds

B
Pea seeds

C
Both will imbibe equal amount of water

D
Pea seeds imbibe water only at alkaline pH

Solution

Imbibition is the process of adsorption of water by a substance. When pea seeds and wheat seeds are put in water, pea seeds will imbibe more water. Pea seed has high amount of protein present in it. Wheat seeds have high amount starch in it. The proteins imbibe more water as compared to the carbohydrates. Hence, proteinaceous pea seeds will imbibe more water than those of wheat seeds and swell up.
Thus, the correct answer is 'Pea seeds.'
Question 10
1 / -0

Rapid water absorption takes place by :

A
Osmosis

B
Active absorption

C
Both A & B

D
None of this

Solution

Osmosis takes place rapidly whenever there is an osmotic gradient developed across a semi permeable membrane.
Whereas active absorption only takes place when there is energy available to drive the absorption of water rapidly.
So the correct answer is ' Osmosis'.

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Re-Attempt Weekly Quiz Competition

Process	Nutrients
Active transport III	I and II Fructose and mannose
Simple Diffusion	IV and V

Transport in Plants Test - 67

Result

Transport in Plants Test - 67

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SHARING IS CARING

Question 1

Phloem

Sclerenchyma

Parenchyma

Aerenchyma

Solution

Question 2

Always positive or more than zero

Always negative or less than zero

Always zero

Variable in different solution

Solution

Question 3

$$I-$$Amino Acids,$$II-Ca^{2+}$$,$$III-$$Passive transport,$$IV-$$Glycerol,$$V-$$Fatty Acids

$$I-$$Galactose,$$II-$$Amino Acids,$$III-$$Passive transport,$$IV-$$Vitamin C,$$V-$$Water

$$I-$$Glucose,$$II-$$Galactose,$$III-$$Facilitated diffusion,$$IV-$$Glycerol,$$V-$$Water

$$I-$$Glucose,$$II-$$Short chain fatty acids,$$III-$$Facilitated diffusion,$$IV-$$Water,$$V-$$Vitamin B complex

Solution

Question 4

Wall pressure is increased

Turgor pressure is increased

Water potential of cell is increased

All the above

Solution

Question 5

towards

through

out of

into

Solution

Question 6

(a) and (c)

(a) and (b)

(b) and (c)

(c) and (d)

Solution

Question 7

Negative hydrostatic pressure

Positive hydrostatic pressure

Root pressure

All of the above

Solution

Question 8

Neutral solutes

Hydrophobic molecules

Non polar molecules

Polar molecules

Solution

Question 9

Wheat seeds

Pea seeds

Both will imbibe equal amount of water

Pea seeds imbibe water only at alkaline pH

Solution

Question 10

Osmosis

Active absorption

Both A & B

None of this

Solution

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$$I-$$Amino Acids,
$$II-Ca^{2+}$$,
$$III-$$Passive transport,
$$IV-$$Glycerol,
$$V-$$Fatty Acids

$$I-$$Galactose,
$$II-$$Amino Acids,
$$III-$$Passive transport,
$$IV-$$Vitamin C,
$$V-$$Water

$$I-$$Glucose,
$$II-$$Galactose,
$$III-$$Facilitated diffusion,
$$IV-$$Glycerol,
$$V-$$Water

$$I-$$Glucose,
$$II-$$Short chain fatty acids,
$$III-$$Facilitated diffusion,
$$IV-$$Water,
$$V-$$Vitamin B complex