Photosynthesis & Plant MCQs with Answers

Plants utilize simple inorganic molecules (CO₂ and H₂O) to prepare _?

• A.Starch and water
• B.Glucose and carbon dioxide
• C.Oxygen and nitrogen
• D.Glucose and oxygen

Which pigment is necessary for photosynthesis to take place?

• A.Xanthophyll
• B.Hemoglobin
• C.Chlorophyll
• D.Carotene

Past Paper MCQ

What process do plants use to produce sugar and starch using sunlight?

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

Which of the following elements is not a macronutrient?

• A.Nitrogen
• B.Phosphorus
• C.Manganese
• D.Potassium

Plants don't need shelter but they need this?

• A.Water
• B.Sunlight
• C.Soil
• D.Air

The diameter of a tree is reduced slightly during the day and increased at night. Which of the following changes in environmental conditions causes the greatest reduction in diameter?

• A.Decrease in wind velocity, temperature and light intensity
• B.Increase in humidity, decrease in temperature and light intensity
• C.Increases in wind velocity, temperature and light intensity
• D.Decrease in wind velocity, increase in humidity and temperature

What do plant roots absorb from the soil?

• A.Water and minerals
• B.Carbon dioxide and sunlight
• C.Oxygen and glucose
• D.Nitrogen and chlorophyll

The absorption maxima of chlorophyll a molecule present in PSII ?

• A.680 nm
• B.700 nm
• C.660 nm
• D.750 nm

What are the main products of photosynthesis?

• A.Glucose and carbon dioxide
• B.Carbon dioxide and water
• C.Glucose and oxygen
• D.Oxygen and nitrogen

During synthesis, the spectral properties of chlorophyll are attained with the insertion of ?

• A.Fe in the tetrapyrrole ring
• B.Mg in the tetrapyrrole ring
• C.Cu in the tetrapyrrole ring
• D.Zn in the tetrapyrrole ring