Free Forms and Functions of Plants MCQs with Answers
272 Forms and Functions of Plants MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Plant nutrition and transport cover mineral uptake, photosynthesis, xylem movement of water and minerals, and phloem translocation of sugars. Plant growth regulators include auxins, gibberellins, cytokinins, abscisic acid and ethene, whose effects on cell division, elongation, dormancy, fruit ripening and tropic responses should not be confused with mineral nutrition.
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Read the Forms and Functions of Plants notesFree MDCAT chapter notes with key terms272 questions · page 9 of 14
- A. Both B, D.
- B. Hydrophytes
- C. None of B, D.
- D. Xerophytes.
Explanation: Xerophytes are plants adapted to arid or dry environments. They have adaptations to conserve water and tolerate drought conditions.
Correct answer: Xerophytes.- A. NO2
- B. Calcium
- C. Gypsum
- D. Nitrogen
Explanation: d) Nitrogen: This is the correct option. Nitrogen is necessary for the development of leaves and is a critical component of chlorophyll…
Correct answer: Nitrogen163. During photorespiration, the glycolate is converted into glycine in a structure of ceil called:
- A. Golgi Bodies
- B. Mitochondria
- C. Glyoxysome
- D. Peroxisome
Explanation: Explanation:In the Peroxisomes, glycolate is oxidized with O2 uptake to glyoxylate by glycolate oxidase, and the glyoxylate is converted…
Correct answer: Peroxisome- A. 6 - 200 g per acre
- B. 4-40 g per acre
- C. 6 - 200 kg per acre
- D. 4 - 40 kg per acre
Explanation: Explanation:Micronutrients are required in quantity ranging from 6-200 grams per acre.
Correct answer: 6 - 200 g per acre- A. Mango
- B. Tobacco
- C. Wheat
- D. Rice
Explanation: Explanation:Potassium fertilizers are especially useful for tobacco, coffee, potato, and corn.This option is not correct.
Correct answer: Tobacco- A. Leaves
- B. Fruits
- C. Root hairs
- D. Branches
Explanation: A is incorrect as the growth of the leaves is dependent on nitrogen.B is incorrect as the development of fruit depends on phosphorous.C is…
Correct answer: Root hairs- A. Chlorophyll
- B. Photosystem
- C. Photon
- D. Electron
Explanation: Photosystem is the correct option because it refers to the functional unit in the chloroplasts of plants and cyanobacteria where the…
Correct answer: Photosystem- A. 680 nm
- B. 780 nm
- C. 700 nm
- D. 580 nm
Explanation: There are two photosystems: PSI and PSII. These are named in order of their discovery.
Correct answer: 700 nm- A. ATP and CO2
- B. ATP
- C. Only CO2
- D. Only Oxygen
Explanation: Linear electron flow (LEF) in photosynthesis produces both ATP and NADPH, and the cyclic electron flow (CEF) around photosystem I has been…
Correct answer: ATP- A. Unstable 6-carbon compound
- B. Unstable 5-carbon compound
- C. Unstable 4-carbon compound
- D. Unstable 3-carbon compound
Explanation: The correct option is A, as the first unstable product formed after CO2 fixation in the Calvin Cycle is the 6-carbon compound…
Correct answer: Unstable 6-carbon compound- A. -CH3
- B. -CHO
- C. -COOH
- D. -OH
Explanation: Chlorophyll A is a bluish-green pigment that is soluble in organic solvents like acetone and alcohol.
Correct answer: -CH3- A. Mg2+
- B. Ca2+
- C. K+
- D. Na+
Explanation: Mg2+ ions are essential in making chlorophyll similar to how iron ions are substantial in making haemoglobin.
Correct answer: Mg2+- A. Membrane of mitochondria
- B. Thylakoid membrane
- C. Membrane of Smooth Endoplasmic Reticulum
- D. Membrane of Rough Endoplasmic Reticulum
Explanation: The thylakoid membrane of the chloroplasts has these light-harvesting clusters called photosystems which contain various pigments needed…
Correct answer: Thylakoid membrane- A. Yellow-orange range
- B. Yellow-red range
- C. Orange-red range
- D. Blue-violet range
Explanation: Carotenoids are one of the accessory pigments in the chloroplasts which absorb light in the Blue-Green and Violet range.
Correct answer: Blue-violet range175. Chlorophyll 'a' and chlorophyll 'b' differ in one of the functional group. Chlorophyll 'a' has:
- A. -CHO
- B. -OH
- C. -CH3
- D. -NH2
Explanation: The only difference between chlorophyll-a and b is that chlorophyll-a has methyl (CH3) on the 2nd pyrrole ring and whereas chlorophyll-b…
Correct answer: -CH3- A. 3-carbon compound
- B. Ribulose bisphosphate
- C. 5-carbon compound
- D. 6-carbon compound
Explanation: Glycerate-3-phosphate, being a carboxylic acid, gets reduced to glyceraldehyde phosphate which is a 3-carbon compound.
Correct answer: 3-carbon compound- A. Glucose
- B. Sucrose
- C. Fructose
- D. None of the above
Explanation: Factual recall;Glucose is the monosaccharide, that makes up the disaccharide sucrose along with fructose, whereas sucrose is the form, in…
Correct answer: Sucrose178. Given figure shows:
- A. Structure of a Lenticel
- B. Hydathode showing gaseous vapour exchange
- C. Fungus reproducing by spore formation
- D. Algae reproducing by spore formation
Explanation: The figure shows the structure of 'Lenticel', which facilitates gaseous exchange and transpiration.
Correct answer: Structure of a Lenticel- A. Apoplast Theory
- B. Symplast Theory
- C. Vacuolar Theory
- D. Cytoplasmic Theory
Explanation: The theory that describes how water and dissolved chemicals are carried through the cell wall and intercellular gaps of plants is called…
Correct answer: Apoplast Theory- A. Saprotrophic mode
- B. Parasitic mode
- C. Photosynthesis mode
- D. Obligate mode
Explanation: Photosynthesis is the process by which green plants, algae, and some bacteria convert light energy into chemical energy, using carbon…
Correct answer: Photosynthesis mode