Photosynthesis & Plant MCQs with Answers

The synthesis of glucose takes place in _?

• A.Leaves
• B.Roots
• C.Stem
• D.Flowers

The process of photosynthesis produces glucose and ?

• A.Carbon dioxide
• B.Nitrogen
• C.Oxygen
• D.Water vapour

The Calvin cycle is also known as?

• A.C₃ pathway
• B.C₄ pathway
• C.CAM pathway
• D.Krebs cycle

The process of plant making food using sunlight is called?

• A.Respiration
• B.Fermentation
• C.Transpiration
• D.Photosynthesis

Consider the following reaction: 6CO₂ + 6H₂O → C₆H₁₂O₆ + 7O₂: How many oxygen atoms are required to balance the above equation?

• A.6
• B.12
• C.18
• D.24

Past Paper MCQ

At night, plants intake

• A.Hydrogen
• B.Carbon dioxide
• C.Nitrogen
• D.Oxygen

Fertilizers are used to fill requirements of plants.

• A.Nutritional
• B.Respiratory
• C.Structural
• D.Reproductive

Which of the following photosynthetic pigment is found in all photosynthetic organisms except bacteria?

• A.Phycobilins
• B.Chlorophyll b
• C.Carotenoids
• D.Chlorophyll a

If the process of photosynthesis ceases to occur (stop happening), then in atmosphere:

• A.Carbon dioxide will increase and oxygen will decrease
• B.Oxygen will increase and carbon dioxide will decrease
• C.Both carbon dioxide and oxygen will increase
• D.Both carbon dioxide and oxygen will decrease

Best efficiency of photosynthesis is present in _?

• A.C-3 plants
• B.C-4 plants
• C.CAM plants
• D.None of these