FREE NEET Biology Practice MCQ Test: Transport In Plants Exercise 3 Questions Answers With Detailed Explanations [PDF]

Answer: (c)

Answer: (d)

Answer: (b)

Answer: (c)

Answer: (a)

Answer: (b)

Answer: (d)

Osmosis occurs in response to a driving force. The net direction and the rate of osmosis depend on both the pressure gradient and concentration gradient.

Answer: (d)

Statements (b) and (c) are correct regarding guttation. Guttation is a loss of water in the form of liquid from the uninjured margins of the leaves of those plants which grows in moist places. It occurs through hydathodes (special type of stomata called water stomata).

Answer: (a)

Some carrier proteins allow transport of only two types of molecules to move together. This is called cotransport. Symport and antiport are two types of cotransport. Symport allows both the molecules to move in the same direction and antiport allows both the molecules to move in opposite direction.

Answer: (d)

The pressure that develops in a cell due to osmotic diffusion of water inside it, is called turgor pressure. Stomata open and close due to turgor pressure of guard cells. When turgid, they swell and bend outward. As a result, the stomatal aperture opens. When they are flaccid, the tension from the wall is released and the stomatal aperture closes.

Answer: (b)

Path of water absorption is as follow

Soil solution → Root hairs → Epiblema/epidermis → Cortex → Endodermis (passage cell) → Pericycle cell → Protoxylem → Metaxylem.

Answer: (a)

Answer: (d)

Statement (d) is incorrect. Pinus seeds cannot germinate and establish without the presence of mycorrhiza, because pinus trees have an obligate association with the mycorrhiza.

Answer: (d)

Reverse osmosis is not an active process as it does not consume ATP, though external pressure is applied in order to carry out osmosis in a reverse direction (lower to higher).

Answer: (c)

Ganong's photometer is used for measuring the rate of transpiration.

Answer: (b)

Answer: (c)

Answer: (d)

In the case of hyperactive control abscisic acid (ABA)plays an important role in the closure of stomata, whenever there is shortage of water ABA is synthesized resulting in the closure of stomata.

Answer: (a)

Answer: (b)

Nerium is a xerophytic plant and has sunken stomata, confined to lower epidermis to reduce the rate of transpiration.