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NEET UG Unit 2B: Membrane Transport, Tonicity & Cell Size — practice questions

Explore 10 free Unit 2B: Membrane Transport, Tonicity & Cell Size questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 2B: Membrane Transport, Tonicity & Cell Size questions and exercises with answers

Showing questions 1–10 of 10.

Macronutrients in plants are required:Read the answer and worked solution →Yellowing of leaves due to lack of chlorophyll is called:Read the answer and worked solution →The technique of growing plants in nutrient solution WITHOUT soil is called:Read the answer and worked solution →The enzyme used by NITROGEN-FIXING bacteria to convert N₂ to NH3 is:Read the answer and worked solution →The genus of bacteria forming symbiotic root nodules in LEGUMES is:Read the answer and worked solution →The main DRIVING FORCE for upward water + mineral transport in tall trees is:Read the answer and worked solution →Symptoms of MOBILE mineral deficiency (e.g., N, P, K) first appear in:Read the answer and worked solution →Insectivorous plants like VENUS FLYTRAP and PITCHER PLANT trap insects mainly to obtain:Read the answer and worked solution →NEET · Biology · Macro or Micro NutrientRead the answer and worked solution →NEET · Biology · Mineral Deficiency — Spot the ErrorRead the answer and worked solution →

Worked practice questions

Macronutrients in plants are required:

  1. In trace amounts only (parts per million)
  2. Only during the seed stage of growth
  3. In large quantities (> 10 mmol/kg dry weight)
  4. Only by C4 plants (not by C3 plants)
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Correct answer: C. In large quantities (> 10 mmol/kg dry weight)

Macronutrients (N, P, K, S, Ca, Mg, C, H, O) are required in LARGE quantities (> 10 mmol/kg). Micronutrients (Fe, Mn, Cu, Mo, Zn, B, Cl, Ni) in trace amounts. Both equally essential.

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Yellowing of leaves due to lack of chlorophyll is called:

  1. Chlorosis (caused by N, Mg, Fe deficiency)
  2. Necrosis (which is tissue death)
  3. Etiolation (a light-deprivation effect)
  4. Senescence (the natural ageing process)
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Correct answer: A. Chlorosis (caused by N, Mg, Fe deficiency)

CHLOROSIS = yellowing of leaves due to lack of chlorophyll. Caused by deficiency of N, Mg, Fe, S, Mn, Zn, Mo. NECROSIS = dead tissues. Etiolation = pale + spindly from no light.

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The technique of growing plants in nutrient solution WITHOUT soil is called:

  1. Aeroponics (roots in misted air)
  2. Hydroponics (roots in nutrient solution)
  3. Aquaponics (with fish co-culture)
  4. Mycorrhiza (fungal partnership)
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Correct answer: B. Hydroponics (roots in nutrient solution)

HYDROPONICS = growing in nutrient solution without soil (Julius von Sachs, 1860). **Aeroponics:** roots in air + mist. Aquaponics combines hydroponics with aquaculture. Mycorrhiza is symbiosis with fungi.

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