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NEET UG Photosynthesis in Higher Plants — practice questions — page 4

Explore 100 free Photosynthesis in Higher Plants questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Photosynthesis in Higher Plants questions and exercises with answers

Showing questions 91–100 of 100.

Water stress lowers the rate of photosynthesis mainly byRead the answer and worked solution →Hatch and Slack worked out the C4 pathway in 1966 in which country?Read the answer and worked solution →C4 plants have dimorphic chloroplasts as bundle sheath onesRead the answer and worked solution →Which genus runs C4 photosynthesis inside single cells, without Kranz anatomy?Read the answer and worked solution →The C4 subtypes NADP-ME, NAD-ME and PEPCK are named after the enzyme used forRead the answer and worked solution →Which enzyme turns pyruvate back into PEP in C4 mesophyll?Read the answer and worked solution →At 30 degrees C, C4 grasses lose about how many water molecules per CO2 fixed?Read the answer and worked solution →The C4 pathway arising independently in many plant families is an example ofRead the answer and worked solution →The C3 pathway is more efficient than C4 underRead the answer and worked solution →Once light is switched off, the biosynthetic phaseRead the answer and worked solution →

Worked practice questions

Water stress lowers the rate of photosynthesis mainly by

  1. Stopping chlorophyll a synthesis
  2. Closing stomata and cutting CO2
  3. Breaking down RuBisCO enzyme
  4. Blocking the splitting of water
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Correct answer: B. Closing stomata and cutting CO2

Under water stress the stomata shut, which reduces the CO2 reaching the leaf.

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Hatch and Slack worked out the C4 pathway in 1966 in which country?

  1. United States
  2. Germany
  3. Australia
  4. England
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Correct answer: C. Australia

Marshall Hatch and Roger Slack worked out the C4 pathway in Australia.

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C4 plants have dimorphic chloroplasts as bundle sheath ones

  1. Are starch-rich, lack grana
  2. Lack all chlorophyll
  3. Lack any starch grains
  4. Have very large grana
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Correct answer: A. Are starch-rich, lack grana

Bundle sheath chloroplasts are starch-rich and lack grana, so they differ from mesophyll chloroplasts.

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