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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:
1. (A), (C), (D) only 2. (B), (C), (D) only
3. (A), (B), (C) only 4. (A), (B), (D) only
Subtopic:  The Pressure Flow or Mass Flow Hypothesis |
Level 3: 35%-60%
NEET - 2023
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Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after:
1. Anaphase 2. Telophase
3. Prophase 4. Metaphase
Subtopic:  Cell Division: Mitosis (Karyokinesis) |
Level 3: 35%-60%
NEET - 2023
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Consider the following tissues in the stellar region of a stem showing secondary growth.
(A) Primary xylem
(B) Secondary xylem
(C) Primary phloem
(D) Secondary phloem

Arrange these in the correct sequence of their position from pith towards cortex.
1. (A), (B), (D), (C) 2. (B), (A), (C), (D)
3. (A), (B), (C), (D) 4. (B), (A), (D), (C)
Subtopic:  Dicot Stem |
Level 3: 35%-60%
NEET - 2023
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A certain plant homozygous for yellow seeds and red flowers was crossed with a plant homozygous for green seeds and white flowers. The F1 plants had yellow seeds and pink flowers. The F1 plants were selfed to get F2 progeny. Assuming independent assortment of the two characters, how many phenotypic categories are expected for these characters in the F2 generation?
1. 9 2. 16
3. 4 4. 6
Subtopic:  Dihybrid Cross: General Consideration |
Level 3: 35%-60%
NEET - 2023
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A):  Ascending limb of the loop of Henle is impermeable to water and allows transport of electrolytes actively or passively. 
Reason (R):  Dilution of filtrate takes place due to efflux of electrolytes in the medullary fluid
In light of the above statements, choose the correct answer from the options given below:
1.  (A) is True, (R) is False
2.  (A) is False, (R) is True
3.  Both (A) and (R) are True and (R) is the correct explanation of (A)
4.  Both (A) and (R) are True but (R) is not the correct explanation of (A)
Subtopic:  Function of the tubules |
Level 3: 35%-60%
NEET - 2023
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There are 250 snails in a pond and within a year their number increases to 2500 by reproduction. What should be their birth rate (in per snail per year)?
1. 10 2. 9
3. 25 4. 15
Subtopic:  Population Characters: Natality & Mortality |
Level 3: 35%-60%
NEET - 2023
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Given below are two statements:
I: The nose contains mucus-coated receptors which are specialised for receiving the sense of smell are called olfactory receptors.
II: Wall of the eyeball has three layers. The external layer is called choroid (dense connective tissue), middle layer is sclera (thin pigmented layer) and internal layer is retina (ganglion cells, bipolar cells and photoreceptor cells)
In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is True but Statement II is False
2. Statement I is False but Statement II is True
3. Both Statement I and Statement II are True
4. Both Statement I and Statement II are False
Level 3: 35%-60%
NEET - 2023
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Match List - I with List - II
List-I List-II
(A) Terpenoids (I) Vinblastin
(B) Lectins (II) Diterpenes
(C) Drug (III) Ricin
(D) Toxin (IV) Concanavalin A
Choose the correct answer from the options given below:
Options: (A) (B) (C) (D)
1. II IV III I
2. II I IV III
3. II III I IV
4. II IV I III
Subtopic:  Primary & Secondary Metabolites |
 53%
Level 3: 35%-60%
NEET - 2023
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