Photosynthesis Concepts and Processes

Mr. Furlong introduces the structure of leaves and the process of photosynthesis. He explains how light energy, composed of various colors, is absorbed by pigments like chlorophyll in the chloroplasts. The structure of leaves, including the cuticle, epidermis, and mesophyll, is adapted for photosynthesis. Chloroplasts contain thylakoids and stroma, where photosynthesis occurs. The process involves light reactions and the Calvin cycle, converting carbon dioxide and water into glucose and oxygen.

What is the relationship between the wavelength of light and its energy?

• Longer wavelength means more energy

• Shorter wavelength means less energy

• Longer wavelength means less energy

• Wavelength does not affect energy

Which pigment is most common in plants and primarily responsible for their green color?

• Anthocyanins

• Chlorophyll a

• Chlorophyll b

• Carotenoids

Why do leaves change color in the autumn?

• Chlorophyll increases in the leaves

• The structure of the leaf changes

• Other pigments become more visible as chlorophyll breaks down

• The leaves produce new pigments

What is the function of the cuticle on a leaf?

• To facilitate gas exchange

• To absorb light

• To store nutrients

• To prevent water loss

What are the openings on the underside of leaves called?

• Epidermis

• Stomata

• Mesophyll

• Guard cells

Which part of the chloroplast is responsible for the light-dependent reactions of photosynthesis?

• Outer membrane

• Stroma

• Inner membrane

• Thylakoids

What is produced during the light-dependent reactions of photosynthesis?

• Glucose

• Carbon dioxide

• Water

• Oxygen

What is the main purpose of the Calvin cycle?

• To produce oxygen

• To convert light energy into chemical energy

• To produce glucose

• To absorb light

Which molecule is a product of the Calvin cycle?

• ATP

• Oxygen

• NADPH

• Glucose

What are the two main stages of photosynthesis?

• Light reactions and glycolysis

• Calvin cycle and Krebs cycle

• Light reactions and dark reactions

• Light reactions and Calvin cycle