Details of Photosynthesis in Plants

These flashcards cover key concepts of photosynthesis, including processes, structures, pathways, and adaptations in plants.

Photosynthesis

Photosynthesis is a complex series of interactions catalyzed by specific enzymes that occurs in plants, algae, and some prokaryotes.

Where do energy-transferring reactions occur in a plant cell?

They occur in the thylakoid membranes of the chloroplasts, organized into units called photosystems.

What are the two types of photosystems?

Photosystem I (PsI) and Photosystem II (PsII).

What is the wavelength absorbed by P680 in Photosystem II?

P680 absorbs red light of 680 nanometers most efficiently.

What is the primary function of photosystems in photosynthesis?

To capture light energy and convert it into chemical energy.

What is the process by which ATP is formed during photosynthesis?

Photophosphorylation.

What does NADPH do in the context of photosynthesis?

NADPH supplies electrons that reduce CO2 to a carbohydrate.

What leads to photorespiration in plants?

Rubisco's lack of specificity, causing it to accept O2 instead of CO2 when O2 levels are high.

What is the C4 pathway and its significance?

A photosynthetic pathway that reduces the effects of photorespiration by using oxaloacetic acid as the first product and is adapted for hot, dry environments.

How do CAM plants adjust their photosynthetic process to arid conditions?

They open their stomata at night for CO2 intake and close them during the day to conserve water.

What is the end product of the Calvin cycle?

The end product is a 3-carbon sugar, PGAL (glyceraldehyde 3-phosphate).

What happens to glucose produced in the Calvin cycle?

It can be converted into sucrose or starch for energy storage.