Question

Given below is a table. Fill in the gaps

Property	Simple diffusion	Facilitated transpor	Active Transport
i. Highly selective		Yes
ii.Uphill transport			Yes
iii. Requires ATP

Answer 1

Simple diffusion:

• Simple diffusion: The movement of molecules is not selective.
• The movement of molecules takes place down the concentration gradient i.e. from higher concentration to lower concentration.
• It is a passive transport which means energy is not required for this process

Final answer:

Property	Simple diffusion
i. Highly selective	No
ii.Uphill transport	No
iii. Requires ATP N	No

Facilitated transport:

• Facilitated transport: The transport of certain molecules is carried out by certain membrane proteins (carrier, gated channel, channel proteins) . The movement of molecules is therefore highly selective.
• The movement of molecules takes place down the concentration gradient i.e. from higher concentration to lower concentration.
• It does not require energy

Final answer:

Property	Facilitated transport
i. Highly selective	yes
ii.Uphill transport	No
iii. Requires ATP	No

Active transport:

• Active transport: The movement of molecules is highly selective.
• The movement molecules are against the concentration gradient i.e. from lower concentration to higher concentration with the help of membrane proteins.
• It requires energy in the form of ATP, as it moves molecules against the concentration gradient

Final answer:

Property	Active Transport
i. Highly selective	Yes
ii.Uphill transport	Yes
iii. Requires ATP	Yes