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1
NEET 2023 Manipur
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-1
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Identify the correct statements regarding Mass flow hypothesis.

(A) Mass flow is faster than diffusion.

(B) Mass flow is the result of pressure difference between the end points.

(C) Different substances involved in mass flow move at different paces.

(D) Mass flow can result through either a positive or a negative hydrostatic pressure gradient.

Choose the correct answer from the options given below :

A
(A), (C), (D) only
B
(B), (C), (D) only
C
(A), (B), (C) only
D
(A), (B), (D) only
2
NEET 2023 Manipur
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During symport two different molecules move across the membrane :

A
in same direction with the help of different carriers located at a common site
B
in same direction with the help of different carriers located at different sites in the same cell
C
in same direction with the help of same carrier
D
in opposite direction with the help of same carrier
3
NEET 2023 Manipur
MCQ (Single Correct Answer)
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Given below are two statements :

Statement I : The process of translocation through phloem is unidirectional but through xylem, it is bidirectional.

Statement II : The most readily mobilized elements are phosphorus, sulphur, nitrogen and potassium.

In the light of the above statements, choose the most appropriate answer from the options given below :

A
Statement I is correct but Statement II is incorrect.
B
Statement I is incorrect but Statement II is correct.
C
Both Statement I and Statement II are correct.
D
Both Statement I and Statement II are incorrect.
4
NEET 2023
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Movement and accumulation of ions across a membrane against their concentration gradient can be explained by

A
Facilitated Diffusion
B
Passive Transport
C
Active Transport
D
Osmosis
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