Free Plant Nutrition and Transport MCQs with Answers
162 Plant Nutrition and Transport MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Plants require macronutrients and micronutrients for growth, and mineral deficiencies produce recognizable symptoms. Transport involves water and minerals through xylem by transpiration pull, cohesion and adhesion, while phloem translocates sugars from sources to sinks. Root pressure and transpiration are distinct mechanisms.
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162 questions · page 6 of 9
- A. Xylem
- B. Collenchyma
- C. Sclerenchyma
- D. Parenchyma
Explanation: Collenchyma is living tissue that provides support to the plant as it has extra cellulose deposited in its cell wall the cell wall is…
Correct answer: Collenchyma- A. Stomata are opened
- B. Day is humid
- C. Concentration of CO2 inside the leaf is high
- D. Concentration of O2 inside leaf is high
Explanation: Photorespiration occurs when Rubisco, an enzyme involved in photosynthesis, binds with O2 instead of CO2.
Correct answer: Concentration of O2 inside leaf is high- A. Nepenthes
- B. Utricularia
- C. Dionea
- D. Sundew
Explanation: Drosera or sundew is a carnivorous plant found in moist, acidic, and nutrient-deficient soils.
Correct answer: Utricularia- A. Sugar
- B. pH
- C. Potassium
- D. All of the above
Explanation: The opening and closing of stomata are primarily controlled by the conversion of starch to sugar and vice versa in guard cells.
Correct answer: Sugar105. Mangroves are:
- A. Xerophytes
- B. Mesophytes
- C. Halophytes
- D. Hydrophytes
Explanation: Mangroves are tropical plants that are adapted to lose, wet soils, salt water and being periodically submerged by tides
Correct answer: Halophytes- A. Stoma of chloroplasts
- B. Granum of the chloroplast
- C. Cytoplasm of the cell
- D. ....
Explanation: Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma, the…
Correct answer: Stoma of chloroplasts- A. Lateral meristem
- B. Apical meristem
- C. Intercalary
- D. None
Explanation: The meristem responsible for wood formation in plants is the lateral meristem, specifically the vascular cambium and the cork cambium.
Correct answer: Lateral meristem- A. Capillary rise of water
- B. Root pressure
- C. Tensile strength
- D. All of these
Explanation: Guttation is the process by which plants excrete excess water in the form of droplets through specialized structures called hydathodes.
Correct answer: Root pressure- A. Increase in the soil nutrient
- B. More aeration of soil
- C. Soil fertility
- D. ....
Explanation: Crop rotation helps return nutrients to the soil without synthetic inputs.
Correct answer: Increase in the soil nutrient- A. 3
- B. 5
- C. 6
- D. 7
Explanation: The ion crosses three main structures when moving from one cell to an adjacent cell in a woody plant:Middle Lamella: This is the…
Correct answer: 3- A. C55H70O6N4Mg
- B. C70H55O11N5Mg4
- C. C14H55O6N5Mg3
- D. C55H76O5N6Mg2
Explanation: The correct molecular formula of chlorophyll b is C55H70O6N4Mg. This formula indicates the presence of 55 carbon atoms, 70 hydrogen atoms…
Correct answer: C55H70O6N4Mg112. The complex force of photosynthesis can be studied by the use of one of the following isotopes :
- A. 6C14
- B. 1H2
- C. 2He4
- D. 6O16
Explanation: Oxygen-16 is the ideal isotope for studying photosynthesis because it allows for precise measurements of oxygen uptake and flow during the…
Correct answer: 6O16- A. Iron
- B. Sodium
- C. Potassium
- D. Magnesium
Explanation: The porphyrin ring of chlorophyll contains a magnesium atom at its center.
Correct answer: Magnesium- A. Tracheids
- B. Trachea
- C. Collenchyma
- D. Sieve tubes
Explanation: Phloem tissues are composed of sieve tubes, which are specialized cells responsible for transporting organic materials, such as sugars…
Correct answer: Sieve tubes- A. Nitrogen
- B. Oxygen
- C. Carbon monoxide
- D. Carbon dioxide
Explanation: Chloroplasts are the site of photosynthesis in plant cells, where carbon dioxide (CO2) is fixed into organic molecules.
Correct answer: Carbon dioxide- A. Thylakoid
- B. Grana
- C. Stroma
- D. Christa
Explanation: Plant cells synthesize sugar in the stroma of chloroplasts. The stroma contains the enzymes necessary for the Calvin cycle, which is the…
Correct answer: Stroma- A. plant hormones
- B. carotenoids
- C. plant enzymes
- D. water present in mysophyll tissue
Explanation: Carotenoids are the photoprotective pigments that absorb light of high intensity and transfer the energy to chlorophyll for…
Correct answer: carotenoids- A. nitrogen
- B. magnesium
- C. potassium
- D. both a and b
Explanation: Chlorosis is the yellowing of leaves due to a lack of chlorophyll, often caused by nutrient deficiencies.
Correct answer: both a and b- A. phosphorus
- B. potassium
- C. magnesium
- D. nitrogen
Explanation: The correct answer is phosphorus. Phosphorus is essential for the development of roots, flowers, seeds, and fruit.
Correct answer: phosphorus120. Hydathodes are
- A. hormones secreting glands
- B. water secreting glands
- C. nectar secreting glands
- D. enzymes secreting glands
Explanation: Hydathodes are holes in leaf magrin through which water is secreted out during guttation.
Correct answer: water secreting glands