Photosynthesis Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

This is a process where plants convert radiant energy from the sun into chemical energy in the form of glucose (sugar)

A

Photosynthesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Where does chlorophyll reside in the cell?

A

Thylakoid Membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

O2 is formed by what during photosynthesis?

A

H2O

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What type of reaction is photosynthesis?

A

Redox Reaction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

During photosynthesis, electrons increase in potential energy therefore making it what type of reaction?

A

Endergonic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What form of energy is light?

A

Electromagnetic Radiation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the range of visible light (in nm)?

A

380-750nm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

These are discrete particles with a fixed amount of energy but have no mass

A

Photons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is pigment?

A

Substance that absorbs visible light

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Why does chlorophyll appear to be green?

A

Chlorophyll doesn’t absorb the wavelengths in the green part of the color spectrum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What happens in a light reaction?

A

Light energy is converted into chemical energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What happens as a result of a light reaction? (4 parts)

A
  • H2O is split to provide e(-) and H(+)
  • NADP(+) is reduced to NADPH
  • ATP is produced
  • O2 is given off
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What:

  • fixes carbon from CO2 into organic molecules
  • reduces fixed carbon into sugar using the NADPH and ATP from light reactions
A

Calvin Cycle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Photosystems, which capture light, are located where in the cell?

A

Thylakoid Membrane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

These contain pigment molecules which absorb light and transfer energy to reaction-center complex

A

Antenna Complexes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

These contain a special pair of chlorophyll (a) molecules which can reduce the primary electron acceptor

A

Reaction-Center Complex

17
Q

What happens during the Cyclic Electron Flow?

A

Electrons from photosystem 1 are transferred back to ETC (electron transport chain)

18
Q

What is produced and what is not produced from the Cyclic Electron Flow?

A

ATP is produced and NADPH is not produced

19
Q

What uses the chemical energy stored in ATP and NADPH to reduce CO2 to sugar (G3P)?

A

Calvin Cycle

20
Q

What are the 3 phases of the Calvin cycle?

A
  • Carbon fixation
  • Reduction
  • Regeneration of CO2 acceptor
21
Q

How many times does the Calvin cycle need to occur in order to produce 1 net G3P?

A

3 times

22
Q

In order to create 1 G3P, the Calvin cycle requires what in terms of ATP and NADPH?

A

9 ATP and 6 NADPH

23
Q

What is it called when Rubisco is used to fix O2 in place of CO2?

A

Photorespiration

24
Q

What is the consequence of using Rubisco to fix O2 in place of CO2?

A

ATP is consumed and photosynthesis is decreased by siphoning off material from the Calvin cycle

25
Q

What is a problem that arises for plants in a hot dry climate?

A

Plants close their stomata to minimize H2O loss but this reduces the amount of CO2 available

26
Q

What makes a plant a C3 plant?

A

Rubisco is used for initial carbon fixation

27
Q

What are the other types of plants (2) that have alternative modes of carbon fixation to minimize photorespiration?

A
  • C4 plants

- CAM plants (crassulacean acid metabolism)

28
Q

Type of plant where the carbon fixation is separated spatially from the Calvin cycle

A

C4 Plants

29
Q

Type of plant where the carbon fixation is separated from the Calvin cycle temporarily

A

CAM plants

30
Q

What happens to the sugar produced by photosynthesis?

A
  • ~50% is used as fuel for cellular respiration
  • Linked together to form cellulose
  • Excess is stored as starch