2.9 IB Photosynthesis - Chlorophyll

Chlorophyll absorbs a higher percentage of _____ and _______ light.

• green and yellow

• red and blue

• orange and purple

• infrared and ultraviolet

What color of light does chlorophyll reflect?

• Red light

• Blue light

• Green light

• Yellow light

The reactants of photosynthesis are...

• Oxygen and glucose.

• Carbon dioxide and water.

• Nitrogen and sulfur.

• Hydrogen and methane.

At approximately which wavelength does chlorophyll a absorb most light?

• 400 nm

• 425 nm

• 450 nm

• 475 nm

What is the equation for photosynthesis?

• 6CO2 + 6H2O + light energy → C6H12O6 + 6O2

• C6H12O6 + 6O2 → 6CO2 + 6H2O + light energy

• 6O2 + 6H2O + light energy → C6H12O6 + 6CO2

• 6CO2 + 6H2O → C6H12O6 + 6O2 + light energy

Which pigments absorb green and blue light but reflect orange and red light?

• Chlorophyll

• Carotenoids

• Anthocyanins

• Phycobilins

What is the significance of the thylakoid membrane in photosynthesis?

• It is the site of the light-dependent reactions of photosynthesis and contains chlorophyll.

• It is where the Calvin cycle occurs.

• It stores glucose produced during photosynthesis.

• It absorbs water for the photosynthesis process.

What pigment absorbs sunlight for photosynthesis?

• Chlorophyll

• Carotene

• Xanthophyll

• Melanin

How do environmental factors influence photosynthesis?

• They have no effect on photosynthesis.

• They can influence the rate of photosynthesis through factors such as light intensity, carbon dioxide concentration, and temperature.

• They only affect the color of the leaves.

• They determine the type of plants that can grow in an area.

What is the difference between chlorophyll a and chlorophyll b?

• Chlorophyll a is the primary pigment in photosynthesis, while chlorophyll b assists by capturing additional light wavelengths.

• Chlorophyll a absorbs blue light, while chlorophyll b absorbs red light.

• Chlorophyll a is found in all plants, while chlorophyll b is only found in algae.

• Chlorophyll a is more efficient in photosynthesis than chlorophyll b, which has no role in the process.