Elements Compounds and Mixtures Multiple Choice Questions and Answers | Elements Compounds and Mixtures MCQs for NEET, AIIMS, JIPMER and other Medical Entrance Exams

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

Answer:Tensile strength
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

Answer: Pink
10 If a cell gets reduced in size when placed in a solution, the solution is
A Isotonic
B Hypotonic
C Hypertonic
D Heterotonic

Answer: Hypertonic
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

Answer: Xylem is blocked
13 The rate of transpiration will _________ if the atmospheric pressure is low
A Increase
B Decrease
C Stay unchanged
D Can’t be determined

Answer: Increase
14 The main function of guard cells is to help with ____________
A Transpiration
B Guttation
C Transcription
D None of the above

Answer: Transpiration
15 Transpiration is regulated by the movements of __________
A Parenchyma cells
B Guard cells
C Epithelial cells
D None of the above

Answer:Guard cells
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

Answer: 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

Answer: Osmosis
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

Answer: Die
19 Transport of food materials in higher plants occurs through
A Flowers
B Companion cells
C Tracheids
D Sieve elements

Answer: Sieve elements
20 Nearly 90% of the flowering plants have __________
A Spores
B Mycorrhizae
C Naked seeds
D None of the above

Answer: Mycorrhizae

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