1. Tardigrade
  2. Question
  3. Biology
  4. Consider the following statements regarding photosynthesis and respiration in plants and select the correct option I) RuBisCO has high affinity to oxygen in low CO2 concentration II)The Calvin pathway occurs in the chloroplast of bundle sheath cells of C4 plants III) Yeast poison themselves when the concentration of alcohol reaches 7 % IV) Oxygen is a final hydrogen acceptor during aerobic respiration

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Q. Consider the following statements regarding photosynthesis and respiration in plants and select the correct option
I) RuBisCO has high affinity to oxygen in low $CO_2$ concentration
II)The Calvin pathway occurs in the chloroplast of bundle sheath cells of $C_4$ plants
III) Yeast poison themselves when the concentration of alcohol reaches $7\%$
IV) Oxygen is a final hydrogen acceptor during aerobic respiration

KCETKCET 2020Respiration in Plants

Solution:

RuBiscO is an enzyme that acts as an oxygenase in low carbon dioxide concentration and acts as a carboxylase under high concentration of carbon dioxide. RuBisco binds with oxygen at high temperatures and low $CO _{2}: O _{2}$ ratio and binds with carbon dioxide at low temperatures and high $CO _{2}: O _{2}$ ratio.
Yeasts poison themselves when the concentration of alcohol reaches around $13 \%$. The Calvin pathway occurs in the bundle sheath cells of the $C _{4}$ plants.
Oxygen is the final hydrogen ion and electron acceptor. The oxygen combines with the hydrogen ions and electrons to form water.