Tag: transport of molecules

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Questions Related to transport of molecules

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

Active transport from outside to inside of molecule across a membrane requires

  1. Cyclic AMP

  2. Acetyl chlorine

  3. ATP

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

Active transport from outside to the inside of molecules across a membrane requires ATP. It is required in transferring solutes across the membrane may be through an ATPase which creates ph gradient across the membrane. Thus, the correct option is C.

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

ATP molecules combine with carrier molecules and allow passage of substances.

  1. Along concentration gradient

  2. Against concentration gradient

  3. Both A and B

  4. ATP is not required
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the active transport, there is a movement of some substance from low concentration to the high concentration i.e., against the concentration gradient wit the help of ATP combined with carrier molecules.

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

Glucose and amino acids are absorbed in the intestine by

  1. Active transport

  2. Passive transport

  3. Selective absorption

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

Glucose and amino acids are absorbed against their concentration gradients in the small intestine. This process requires energy in the form of ATP, which characterizes active transport.

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

Which of the following means of transmembrane transport involves the expenditure of energy by the cell and can move materials up a concentration gradient?

  1. Osmosis

  2. Facilitated diffusion

  3. Simple diffusion

  4. Active transport
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
In one form of transport across the cell membrane, ATP is utilized. The utilization of an ATP molecule provides the cell with an energy boost which enables the transport of different molecules across the cell membrane. This is termed as active transport of molecules across the cell membrane.
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

Decreasing order concentration of minerals inside cell is

  1. Ca$^{+2}$$-$K$^+$$-$Na$^+$.
  2. K$^+$$-$Ca$^{+2}$$-$Na$^+$.
  3. K$^+$$-$Na$^+$$-$Ca$^{+2}$.
  4. Na$^+$$-$K$^+$$-$Ca$^{+2}$.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Potassium ions are usually higher inside the cell than outside the cell, and its concentration inside the cell is about 10 to 30 fold higher than the other components, while sodium ion is higher outside the cell than inside the cell. 
So, the answer is C.
Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

Choose the correct answer from the alternatives given.
Active transport

  1. Requires an input of ATP

  2. Is involved in diffusion

  3. Occurs in osmosis and facilitated transport

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
In one form of transport across the cell membrane, ATP is utilized. The utilization of an ATP molecule provides the cell with an energy boost which enables the transport of different molecules across the cell membrane. This is termed as active transport of molecules across the cell membrane.

So, the correct answer is 'Requires an input of ATP'.
Multiple choice biology movement in and out of the cell transport of molecules osmosis and plasmolysis plant water relation

Energy is required for

  1. Active transport

  2. Facilitated transport

  3. Diffusion

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
In one form of transport across the cell membrane, called active transport, ATP is utilized. The utilization of an ATP molecule provides the cell with an energy boost which enables the transport of different molecules across the cell membrane.
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

Choose the correct answer from the alternatives given.
Which of the following processes requires the greatest expenditure of energy by the cell?

  1. Facilitated diffusion

  2. Diffusion

  3. Active transport

  4. Osmosis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
In one form of transport across the cell membrane, ATP is utilized. The utilization of an ATP molecule provides the cell with an energy boost which enables the transport of different molecules across the cell membrane. This is termed as active transport of molecules across the cell membrane.

So, the correct answer is 'Active transport'.