PLTL Photosynthesis

General Photosynthesis

100

In what organelle does photosynthesis occur in?

Chloroplast 

200

Which kinds of organisms undergo photosynthesis?

- Plants

- Algae

- Photosynthetic bacteria / cyanobacteria

300

What is the chemical equation for photosynthesis?

Light + 6CO₂ + 12H₂O -> C₆H₁₂O₆ + 6H₂O + 6O₂

400

What is the primary electron carrier used in photosynthesis? What is the oxidized and reduced form of this carrier?

NADP+ / NADPH is the primary electron carrier in photosynthesis

Oxidized: NADP+

Reduced: NADPH

this is different from NADH electron carrier seen in cell respiration; NADPH has an extra phosphate group

500

What are the products of the light dependent reactions? How are they used in the light independent reactions?

Light dependent reactions release ATP and NADPH that will be used to create sugar in the Calvin Cycle

Steps of Photosynthesis

100

Photosynthesis can be broken up into 2 parts, name these parts and where they occur within the chloroplast.

1. Light dependent reactions

2. Light independent reactions / Carbon fixation

200

What is the first stage of the light dependent reaction?

Light harvesting stage

300

What is the second stage of the light dependent reaction?

NADPH and ATP synthesis

400

What is the name of the cycle involved in the light independent reactions / carbon fixation? What takes place, generally?

Calvin cycle - NADPH and ATP are used to create precursor molecules of glucose

500

Where do the light dependent and light independent reactions take place within the chloroplast?

Light dependent - thylakoid membrane

Light independent / Carbon fixation - stroma

Cell Respiration vs. Photosynthesis

100

How does the chemical equation of cell respiration differ from photosynthesis?

They're essentially the opposite of each other, which reflects the functions of both metabolic pathways

Cell Respiration: C₆H₁₂O₆ + 6O₂ -> 6CO₂ + 6H₂O + Energy (ATP)

Photosynthesis: Light energy + 6CO₂ + 6H₂O -> C₆H₁₂O₆ + 6O₂

cell respiration is responsible for oxidizing/breaking down glucose for energy, while photosynthesis is responsible for using energy to synthesize glucose

200

Which of these electron carriers are involved in cell respiration? Describe their oxidized and reduced form.

NAD+/NADH, FAD/FADH₂, and NADP+/NADPH.

NADH and FADH₂ are involved in cell respiration.

NAD+ is the oxidized form, NADH is the reduced form

FAD is the oxidized form, FADH₂ is the reduced form

300

Which molecule is responsible for helping plants trap sunlight energy during photosynthesis?

Chlorophyll

400

The gradient of which atom is responsible for powering ATP synthase to produce ATP in both photosynthesis and respiration?

H⁺

500

T/F: A direct product of the Calvin Cycle is glucose

False - the Calvin cycle does not produce glucose, instead it produced glyceraldehyde-3-phosphate (G3P) which is a precursor molecule that can be used to create glucose

G3P -> glucose