Tag: movement in and out of the cell

Quizzes (3) Questions (117)

Questions Related to movement in and out of the cell

Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

ions are absorbed from the soil by

  1. Passive transport

  2. Active transport

  3. Both (1) & (2)

  4. Imbibition
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Minerals are absorbed from the soil in the form of ions. Absorption of minerals and water are two different processes but the  pathway is same. Mineral ions cannot be absorbed by osmosis or diffusion because the concentration is low. So the root hair cells have carrier molecules on their surface which pick the ions and move against the concentration gradient. Since the movement is against the concentration gradient then ATP will be required. So The absorption of ion is a Active process. 


So, the correct answer is 'Active transport'.

Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

${ Na+K }^{ + }$ pump represents

  1. Active transport

  2. Passive transport

  3. Osmosis

  4. Simple diffusion
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The sodium-potassium pump is a specialized mechanism to transport proteins using energy. The process of moving sodium and potassium ions across the cell membrane is an active transport as it involves the hydrolysis of ATP. The hydrolysis of ATP molecule provides the necessary energy for the transport of molecules across the membrane. The action involves an enzyme known as Na+/K+-ATPase.

So, the correct answer is 'Active transport'.

Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

The movement of a molecule across a typical plant cell about 50mm takes aproximately

  1. 2.5m

  2. 2.5 h

  3. 2.5s

  4. none of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Lines of stomates (shown by the orange colour of the guard cells) lie along the flanks describe the status and movement of water in plants, soil and the atmosphere. This internal hydrostatic pressure (also called turgor pressure) is typically 0.5 away from the cell wall, and solution with small molecular weight solutes. 

So, the correct option is "D" (None of these).

Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

What happens when wilted vegetable are dipped in water _________________.

  1. They regain their size

  2. Remain to be same

  3. Colour will change

  4. Decrease in size because of lose of water.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • After dipping into water wilted vegetable regain their size, as water travells through a network of veins through out the plant and cell are hydrated and refirm their size. by a process called osmosis .
  • Leaves turn yellow or red when they falls , in fallpalnt breakdown and reabsorb chlorophyll, letting the colours of other pigments show through , hence colour changes.
  • When vegitables are wilted due to  dehydration, their size decreases due to loss of water.
 So the correct answer is " They regain their size".

Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

Which one of the following is the correct statement for an active sodium-potassium ATPase ?

  1. It pumps out 3 Na-ions and pumps in 2 K-ions

  2. It pumps out 3 Na-ions and pumps in 3 K-ions

  3. It pumps out 3 Ca-ions and pumps in 2 K-ions

  4. It pumps out 3 Na-ions and pumps in 2 Ca-ions
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Sodium-potassium pump is important to produce action potential by nerve cells. As it transport of three Na+ to the outside of the cell and the transport of two K+ ions to the inside. This changes the membrane potential on the inside, making the inside of the cell more negative or hyperpolarized, which leads to forward movement of electric impulse

So, the correct answer is 'It pumps out 3 Na$^+$and pumps in 2 K$^+$ '

Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

The absorption of water due to expenditure of energy is called as ____________.

  1. Active absorption

  2. Non-smotic absorption

  3. Passive absorption

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

 It is called water absorption 'through roots', rather 'by' roots. It occurs in rapidly transpiring plants during the daytime, because of the opening of stomata and the atmospheric conditions. The force for absorption of water is created at the leaf end i.e. the transpiration pull.

Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

Active transport

  1. Releases energy

  2. Requires energy

  3. Produces ATP

  4. Produces a toxic substance
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

There are two types of absorption mechanisms i.e., active and passive transport. Active transport is the movement of solute or solvent molecules against the concentration gradient. It requires the expenditure of energy in the form of ATP. Thus, the correct answer is option B.

Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

Active transport across cell membrane requires

  1. Glucose

  2. Steroids

  3. Energy in the form ATP

  4. Proteins and glucose
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In active transport, substances move against a concentration gradient across a cell membrane. Hence energy is required. The energy available in the body in the form of ATP is used to move this substance across the cell membrane. Thus the correct answer is option C.

Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

Movement of ions r molecules against electrochemical gradient is called ______________.

  1. Pinocytosis

  2. Diffusion

  3. Active transport

  4. Brownian movement
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Active transport is defined as the movement of molecules or ions across a cell membrane against their concentration or electrochemical gradient, requiring cellular energy.