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 7 of 9
- A. hydroxyl group
- B. methyl group
- C. carboxyl group
- D. aldehyde group
Explanation: Chlorophyll 'a' is an essential pigment in photosynthesis, and its structure includes a porphyrin ring.
Correct answer: methyl group- A. Hydrophytes
- B. Xerophytes
- C. Mesophytes
- D. All of the above
Explanation: Sunken stomata are a characteristic adaptation found in xerophytes, which are plants adapted to dry, arid environments.
Correct answer: Xerophytes- A. Violet blue light
- B. Orange light
- C. Blue-red light
- D. Red, orange light
Explanation: Chlorophyll a and b primarily absorb blue and red light. Blue light, being high in energy, excites electrons to a higher energy level…
Correct answer: Blue-red light- A. Vessels, tracheids, parenchyma
- B. Sieve tubes, companion cells, fibers
- C. Parenchyma, sieve tube, vessels
- D. Fibers, companion cells, tracheids
Explanation: Xylem tissue is primarily responsible for water transport in plants and consists of four main components: tracheids, vessels, parenchyma…
Correct answer: Vessels, tracheids, parenchyma125. Carotenoid contains:
- A. Carotenes
- B. Xanthophylls
- C. Chlorophyll - C
- D. Both (A) and (B)
Explanation: The carotenoids are divided into two main classes: carotenes and xanthophylls.
Correct answer: Both (A) and (B)- A. Adhesion
- B. Cohesion
- C. Collision
- D. Corrosion
Explanation: The correct answer is Adhesion. Adhesion describes the attraction between unlike molecules.
Correct answer: Adhesion- A. Water potential
- B. Pressure potential
- C. Solute potential
- D. Osmotic potential
Explanation: The correct answer is Solute potential. The concentration of water molecules is inversely proportional to solute potential because when…
Correct answer: Solute potential- A. Grasses
- B. Under ground stems
- C. Fruit-nuts
- D. Cabbage leaves
Explanation: Bulliform cells or motor cells are large, bubble-shaped epidermal cells that occur in grps on the upper surface of the leaves of many…
Correct answer: Grasses- A. N2
- B. O2
- C. CO2
- D. NH3
Explanation: The stroma of chloroplasts is where the Calvin cycle occurs, which is responsible for fixing carbon dioxide (CO2) into organic molecules…
Correct answer: CO2- A. Methyl group
- B. Carboxyl group
- C. Aldehyde group
- D. Hydroxyl group
Explanation: The porphyrin ring in chlorophyll-b is specifically attached to an aldehyde group, which includes a carbonyl group (C=O) bonded to a…
Correct answer: Aldehyde group- A. Magnesium
- B. Iron
- C. Phosphorus
- D. Potassium
Explanation: The correct answer is Magnesium. Magnesium is a critical component of chlorophyll, and its deficiency leads to chlorosis-a condition where…
Correct answer: Magnesium- A. Halophytes
- B. Mesophytes
- C. Sciophytes
- D. Xerophytes
Explanation: Sciophytes are plants that grow in moderate to low intensity of light under the cover of large trees.
Correct answer: Sciophytes- A. P 600
- B. P 680
- C. P 700
- D. P 760
Explanation: Photosystem I has chlorophyll a molecule which absorbs maximum light of 700 nm and is called P700, whereas reaction center of photosystem…
Correct answer: P 700- A. Red-Yellow-Green
- B. Red-Orange-Blue
- C. Orange-Blue-Green
- D. Red-Orange-Yellow
Explanation: Accessory Pigments are the source of much of the RED-ORANGE-YELLOW coloration that we see in plant leaves.
Correct answer: Red-Orange-Yellow- A. Grana
- B. Stroma
- C. Thylakoids
- D. Intergrana
Explanation: In chloroplasts, chemiosmosis occurs in the thylakoids.
Correct answer: Thylakoids- A. Sodium Ions
- B. Magnesium ions
- C. Potassium ions
- D. Calcium ions
Explanation: Influx of potassium ions decreases water potential in the guard cell so water enters the cell from surrounding cells.
Correct answer: Potassium ions- A. RuBP + ATP
- B. RuBP + PGAL
- C. NADPH + ATP
- D. PGAL + ATP
Explanation: The two products of light dependent reaction of photosystem are ATP and NADPH.The light reaction is the first stage of the photosynthesis…
Correct answer: NADPH + ATP- A. Phytochrome
- B. Phytokinin
- C. Phytocyanin
- D. Carotenoids
Explanation: Some carotenoids protect chlorophyll from intense light by absorbing and dissipating excessive light energy, rather than transferring…
Correct answer: Carotenoids- A. Yellow, Red, Green, Blue
- B. Orange, Yellow, Red, Brown
- C. Green, Yellow, Blue, Brown
- D. Blue, Red, Green, Yellow
Explanation: Photosynthetic organisms contain light-absorbing molecules called pigments that absorb only specific wavelengths of visible light while…
Correct answer: Orange, Yellow, Red, Brown- A. PC
- B. PQ
- C. Cytochrome-b
- D. Pentamerous
Explanation: Plastoquinone (PQ) is the correct answer as it accepts excited electrons from photosystem-II and transfers them down the electron…
Correct answer: PQ