Photosynthesis Measurement and Concepts

Mr. Anderson introduces an AP Biology lab focused on plant pigments and photosynthesis. The video covers the basics of photosynthesis, including the light reaction and Calvin cycle. It explains a chromatography lab to separate plant pigments and an experiment to measure photosynthetic rate using leaf chads. An alternative method using DPIP and a spectrometer is also discussed.

What are the two main parts of photosynthesis?

• Light reaction and Calvin cycle

• Electron transport chain and fermentation

• Oxidative phosphorylation and photolysis

• Glycolysis and Krebs cycle

Which pigment is crucial for starting photosynthesis?

• Xanthophyll

• Carotene

• Chlorophyll a

• Chlorophyll b

What is the purpose of chromatography in the lab?

• To measure the rate of photosynthesis

• To observe the buoyancy of leaf chads

• To separate plant pigments

• To calculate the RF value

What is the RF value in chromatography?

• The distance the pigment moves

• The ratio of pigment to solvent movement

• The distance the solvent moves

• The ratio of solvent to pigment movement

What role does baking soda play in the photosynthesis lab setup?

• It acts as a solvent

• It increases temperature

• It provides oxygen

• It provides carbon dioxide

How is the rate of photosynthesis measured in the lab setup?

• By counting the number of leaf chads

• By measuring the time taken for leaf chads to float

• By observing the color change in pigments

• By calculating the RF value

Which colors of light result in a higher photosynthetic rate?

• White and black

• Red and blue

• Orange and purple

• Green and yellow

What happens to the photosynthetic rate as the distance from the light increases?

• It fluctuates

• It remains constant

• It decreases

• It increases

What is the role of DPIP in the alternative lab method?

• It acts as a solvent

• It replaces NADP+

• It measures temperature

• It provides carbon dioxide

How is the change in DPIP color measured?

• By calculating RF value

• Using a thermometer

• By observing buoyancy

• With a spectrometer