AP Biology Lab 4: Plant Pigments and Photosynthesis

Mr. Anderson guides students through AP Biology Lab 4, focusing on plant pigments and photosynthesis. The video covers the basics of photosynthesis, including the light reaction and Calvin cycle. It explains the role of plant pigments, particularly chlorophyll A, and demonstrates a chromatography lab using spinach to separate pigments. The video also details how to calculate RF values and includes an experiment using leaf chads to observe photosynthesis rates.

What is the primary purpose of photosynthesis in plants?

• To absorb water from the soil

• To produce nitrogen for the soil

• To convert carbon dioxide into usable carbon

• To convert sunlight into oxygen

Which pigment is crucial for the process of photosynthesis?

• Xanthophyll

• Carotene

• Chlorophyll A

• Chlorophyll B

What is the purpose of using chromatography in the lab?

• To measure the amount of sunlight absorbed

• To determine the water content in leaves

• To separate plant pigments

• To calculate the amount of oxygen produced

How is the RF value calculated in chromatography?

• By adding the distances moved by the pigment and the solvent

• By dividing the distance moved by the pigment by the distance moved by the solvent

• By multiplying the distance moved by the pigment by the distance moved by the solvent

• By dividing the distance moved by the solvent by the distance moved by the pigment

Which pigment moves the furthest in chromatography?

• Chlorophyll A

• Xanthophyll

• Chlorophyll B

• Carotene

What is the purpose of using baking soda in the leaf chads experiment?

• To provide carbon dioxide for photosynthesis

• To increase the water absorption

• To change the color of the leaves

• To decrease the rate of photosynthesis

What can be observed by using boiled chloroplasts in experiments?

• The change in pigment color

• The decrease in photosynthesis rate

• The effect of temperature on photosynthesis

• The increase in photosynthesis rate