Elements Compounds and Mixtures Multiple Choice Questions and Answers | Elements Compounds and Mixtures MCQs for NEET, AIIMS, JIPMER and other Medical Entrance Exams
1
The ability of water to resist a pulling force is known as _________
A
Tensile strength
B
Surface tension
C
Cohesion
D
Capillarity
2
In dorsiventral leaf, the number of stomata per unit area are generally
A
Same on both surfaces
B
More on lower surface
C
More on upper surface
D
Absent in upper surface
Answer:More on lower surface
3
In an isobilateral leaf the number of stomata per unit area is
A
More on lower surface
B
More on upper surface
C
Same on both surfaces
D
Absent in upper surface
Answer: Same on both surfaces
4
Water in plants is transported by or ascent of sap takes place through
A
Root pressure
B
Transpiration pull
C
Diffusion pressure deficit
D
Turgor pressure
Answer: Diffusion pressure deficit
5
Which ones do not show transpiration?
A
Aquatic plants with floating leaves
B
Aquatic submerged plants
C
Plants growing in hilly areas
D
Plants living in deserts
Answer: Aquatic submerged plants
6
Which of the following statements is not true?
A
The Apoplastic movement of water occurs exclusively through the cell wall without crossing any membrane
B
metaphase of mitosisand anaphase of meiosis II
C
The symplastic pathway occurs from cell to cell through plasmodesmata
D
Membrane permeability depends on the membrane composition as well as the chemical nature of the solute
Answer:Solute present in any cell increase the free energy of water or water potential
7
Which one of the following these is not related to guttation
A
Water is given out in the form of droplets
B
Water given out is impure
C
Water is given out during night time
D
Guttation is of universal occurrence
Answer: Guttation is of universal occurrence
8
Which of the following is not purpose of transpiration?
A
Supplies water for photosynthesis
B
Maintains shape and structure of plants
C
Helps in translocation of sugar from source to sink
D
Transports minerals from the soil to all parts of plants
Answer:Helps in translocation of sugar from source to sink
9
Cobalt chloride is blue in dry state .In contact with moisture it turns into
A
Red
B
Orange
C
Pink
D
Purple
10
If a cell gets reduced in size when placed in a solution, the solution is
A
Isotonic
B
Hypotonic
C
Hypertonic
D
Heterotonic
11
A cell placed in strong salt solution will shrink because
A
Cytoplasm will disintegrate
B
Cell wall gets broken due to mineral salts
C
Salt water enters the cell
D
Water comes out by Exosmosis
Answer: Water comes out by Exosmosis
12
Wilting in plants occurs when
A
Phloem is blocked
B
Xylem is blocked
C
Cortical cells are blocked
D
Pith is removed
13
The rate of transpiration will _________ if the atmospheric pressure is low
A
Increase
B
Decrease
C
Stay unchanged
D
Can’t be determined
14
The main function of guard cells is to help with ____________
A
Transpiration
B
Guttation
C
Transcription
D
None of the above
15
Transpiration is regulated by the movements of __________
A
Parenchyma cells
B
Guard cells
C
Epithelial cells
D
None of the above
16
The steroid hormones easily pass through the plasma membrane through simple diffusion because they are _____
A
Gaseous
B
Carbon-based
C
Water Soluble
D
Lipid Soluble
17
Living cells placed in an isotonic solution tend to retain their shape and size. This is based on the principle of
A
Diffusion
B
Transpiration
C
Osmosis
D
None of the above
18
Girdling around the trunk of a tree can cause it to ________ if it cannot regrow to bridge the wound
A
Stop absorbing water
B
Stop growing
C
Die
D
None of the above
19
Transport of food materials in higher plants occurs through
A
Flowers
B
Companion cells
C
Tracheids
D
Sieve elements
20
Nearly 90% of the flowering plants have __________
A
Spores
B
Mycorrhizae
C
Naked seeds
D
None of the above
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Categories: Biology, Biology, NEET
Tags: NEET
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