10th Grade Biology Worksheets Multiple Choice Questions (MCQ) PDF Download

MCQ 1: The process of denitrification returns nitrogen into the

1. ecosystem
2. atmosphere
3. biosphere
4. organism

MCQ 2: The representation of biomass energy present in different levels of the food chain is classified as

1. food chain pyramid
2. food web pyramid
3. biomass pyramid
4. ecological pyramid

MCQ 3: The oxides of nitrogen (NO, NO₂) are dissolved in water to form

1. nitric acid and nitrous acid
2. citric acid and nitrous acid
3. nitrates
4. nitric acid and hydrogen

MCQ 4: With the help of bacteria, the ammonia is transformed into

1. ammonia nitrous
2. ammonium nitrate
3. nitrites
4. nitrates

MCQ 5: The movement of inorganic compounds and elements is classified as

1. geochemical cycles
2. kinematic cycles
3. nutrient cycles
4. biomass cycles