Photosynthesis & Plant MCQs with Answers

Plants prepare their food in the presence of?

• A.Sunlight
• B.Oxygen
• C.Nitrogen
• D.Carbon dioxide only

Which one of the following substances traps sunlight?

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

Which one of the following affects the photosynthesis and growth of plants?

• A.Acid Rain
• B.Ozone Layer
• C.Greenhouse Effect
• D.Soil Erosion

During night, plants give out more ?

• A.Oxygen
• B.Carbon Dioxide
• C.Nitrogen
• D.Water Vapour

Carbon dioxide + water (sunlight/chlorophyll) = ?

• A.Glucose + Water + Oxygen
• B.Glucose + Carbon dioxide + Oxygen
• C.Glucose + Oxygen only
• D.Water + Oxygen only

What is the respiration equation in plants?

• A.C6H12O6 + 6O2 → 6CO2 + 6H2O
• B.6CO2 + 6H2O → C6H12O6 + 6O2
• C.C6H12O6 + 6H2O → 6CO2 + 6O2
• D.6CO2 + 6O2 → C6H12O6 + 6H2O

The green plants, algae, and some bacteria that can make their own food by using H2O and CO2 in the presence of sun's energy are called?

• A.Consumers
• B.Parasites
• C.Decomposers
• D.Producers

Past Paper MCQ

Carbohydrates are stored in Plants and animals in the following respective form

• A.Cellulose and glucose
• B.Glycogen and starch
• C.Starch and glycogen
• D.Glucose and cellulose

Macronutrients that constitute more than 1% each of dry organic weight are _?

• A.C, H, O, Na, K
• B.C, H, O, N, S
• C.C, H, O, Ca, Fe
• D.C, H, O, N, P

Plants absorb during day time to prepare their food.

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