Biogeochemical Cycles Quiz

Which cycle has no atmospheric component?

• Nitrogen cycle

• Oxygen cycle

• Carbon cycle

• Phosphorus cycle

What is the main reservoir of nitrogen in the nitrogen cycle?

• Atmosphere

• Soil

• Plants

• Oceans

Which process converts nitrate to gaseous nitrogen in the nitrogen cycle?

• Nitrification

• Assimilation

• Nitrogen fixation

• Denitrification

What is the most important inorganic form of phosphorus?

• Ammonia

• Urea

• Phosphate

• Nitrate

Which of the following is a major constituent of nucleic acids, phospholipids, and ATP?

• Nitrogen

• Carbon

• Phosphorus

• Oxygen

What is the largest reservoir of phosphorus?

• Rocks

• Soil

• Atmosphere

• Oceans

What is the process of converting organic nitrogen compounds into ammonia called?

• Assimilation

• Ammonification

• Nitrification

• Nitrogen fixation

What is the pivotal molecule of the carbon cycle ?

• Phosphorus

• Oxygen

• Nitrogen

• Carbon dioxide

Which of the following is a key process in the movement of carbon through its cycle?

• Nitrification

• Assimilation

• Denitrification

• Photosynthesis

What is the process of converting nitrates to be taken into plants?

• Nitrogen fixation

• Nitrification

• Assimilation

• Denitrification