Photosynthesis Applications and Implications 2

Question 1

Which agricultural practice directly exploits the relationship between photosynthesis and plant density?

Accepted Answer

Plant spacing optimization

Answer

Plant spacing is optimized so each plant receives sufficient light for maximum photosynthesis without shading competitors.

Question 2

What is the primary reason biofuels derived from algae are considered more efficient than corn-based ethanol?

Accepted Answer

Algae have higher photosynthetic efficiency and faster growth rates

Answer

Algae convert solar energy to biomass far more efficiently than corn and can be harvested much more frequently.

Question 3

How does supplemental CO2 enrichment in commercial greenhouses improve crop yield?

Accepted Answer

It directly increases the rate of the Calvin cycle

Answer

Elevated CO2 increases substrate availability for RuBisCO, accelerating carbon fixation in the Calvin cycle.

Question 4

Artificial photosynthesis research primarily aims to produce which commercially valuable output?

Accepted Answer

Hydrogen fuel

Answer

Most artificial photosynthesis systems are designed to split water and generate hydrogen gas as a clean fuel source.

Question 5

A farmer notices crops grown under red-filtered plastic tunnels grow faster than those in white tunnels. What best explains this?

Accepted Answer

Chlorophyll absorbs red light most efficiently for photosynthesis

Answer

Chlorophyll a and b have absorption peaks in the red wavelength range, making red light particularly effective for driving photosynthesis.

Photosynthesis Practice Test