Photosynthesis

Question 1

Two forms of photosynthesis

Answer 1

Anoxygenic-does not produce oxygen

Oxygenic-does produce oxygen

Question 2

What organisms is anoxygenic photosynthesis found in?

Answer 2

four different bacterial groups: purple bacteria, green sulfur bacteria, green non sulfur bacteria, and heliobacteria

Question 3

What organisms is oxygenic photosynthesis found in?

Answer 3

cyanobacteria, seven groups of algae, and all Land plants

Question 4

Photosynthesis in plants

Answer 4

happens primarily in the leaves, and the leaves contain organelles called CHLOROPLASTS, which carry out the photosynthetic process.

Question 5

What are the stages of photosynthesis in plants

Answer 5

1. Capturing energy from the sunlight
2. using the energy to make ATP and to reduce the compound NADP+, an electron carrier, to NADPH, and
3. using the ATP and NADPH to power the synthesis of organic molecules from CO2 in the air

Question 6

Thylakoid membrane

Answer 6

internal membrane of the chloroplast

• is a continous phospholipid bilayer organized into flattened sacs that are found stacked on one another in a column called a GRANA
• thylakoid membrane contains CHLOROPHYLL and other photosynthetic pigments for capturing light energy along with the machinery to make ATP
• Photosynthetic pigmes are clustered together to form photosystems

Question 7

Stroma

Answer 7

is the semiliquid substance surrounding the thylakoid membrane
-stroma houses the enzymes needed to assemble organic molecules from CO2 using energy from ATP coupled with reduction via NADPH.

Question 8

Photosystem

Answer 8

photosystems contain pigment molecules which are capable of capturing photons (packets of energy) exciting the molecule and passes the energy from one molecule to the next until it arrives at a chlorophyll molecule that is in contact with a membrane bound protein that can accept the electron. This protein then passes it on to a series of other membrane proteins that pout the energy to work making ATP and NADPH.

Question 9

Carbon Fixation

Answer 9

the formation of organic molecules from CO2. As long as ATP and NADPH are available the carbon fixation reaction can occur either in the presence or absence of light.

Question 10

pigments

Answer 10

are molecules that absorb light energy in the visible range