Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Botony > Photosynthesis > Flashcards

Photosynthesis Flashcards

1
Q

What supplies energy for chemical reactions

A

ATP, NADH, NADPH, FADH2

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

Cellular Respiration

A

the oxidation of organic molecules to generate ATP

  • CO2 is byproduct
  • Performed by all living cells
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Redox Reactions

A

Reaction involving transfer of electrons

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

Redox Reagent

A

chemical that catalyzes redox reactions

-come in oxidized and reduced forms

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

Oxidized forms of redox reagents

A

NADP+ NAD+ FAD

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

Reduced forms of redox reagents

A

NADPH, NADH, FADH2

-Reactive forms b/c have an extra electron at a high energy level

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

Steps of redox reaction

A
  1. Reduction of redox reagent
  2. Subsequent oxidation of the reagent
  3. Leaves behind a proton (that gets used later)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

How to make ATP

A

ADP+Pi

-Requires energy and ATP-synthase

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

Photosynthesis

A

Conversion of light energy into chem energy (carbs)

  • Uses CO2 and H2O, creates carbs and gives off O2 and H2O
  • Light reactions and Calvin Cycle
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Light Reactions

A

Uses light energy to make NADPH and H+

  • Reagent is H2O
  • Produces ATP (sent to calvin cycle)
  • O2 is byproduct
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Calvin Cycle

A

Fixes CO2 to create sugars

-needs NADPH and ATP for energy

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

Visible Light

A

Band along electromagnetic spectrum

-sufficient energy to excite molecules and cause reactions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Pigments

A

Substances that absorb some wavelength of light and reflect others

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

Absorption Spectrum

A

Range of absorbed and reflected wave lengths

  • specific for each pigment
  • Chlorophyll and accessory pigments
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Chlorophyll

A

Absorbs blue and red light

  • Reflects green light
  • Main pigment of photosynthesis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Accessory Pigments

A

Chlorophyll b, carotenoids

-Different absorption spectrum than chlorophyll

17
Q

Chloroplast Structure

A
  • Outer membrane
  • Inner membrane: thylakoid and grana
  • Stroma:plastid goo
18
Q

Grana Membranes

A

Binds chlorophyll, accessory pigments, photosystems, electron transport proteins, ATP synthase
-Runs light reactions

19
Q

Photosystems

A

Group of pigment molecules whose purpose is to absorb light

  • 250-400 pigment molecules
  • Antenna complex and reaction center
20
Q

Antenna Complex

A

Pass light energy to reaction center

-All but 2 of the pigment molecules

21
Q

Resonance Energy Transfer (RET)

A

Light energy is absorbed by a pigment molecule in antenna complex

  • Energy is passed to a neighboring molecule
  • Energy hits reaction center
22
Q

Reaction Center

A

An electron is energized–> jumps off a chlorophyll a

23
Q

PSII structures

A

Antenna complex

  • reaction center
  • Oxygen Evolving complex (OEC)
24
Q

PSII Functions

A

Phosphorylation and photolysis

25
Q

PSII Phosphorylation

A
  1. Light energy excites pigment molecules in PSII
  2. RET
    3 Reaction center loses an electron
  3. Electron is passed down electron transport proteins
  4. Energy is used to pump H+ against gradient
  5. Photophosphorylation (Protons flow through ATP-synthase to make ATP)
26
Q

Photolysis

A

Water splits to create Oxygen, electrons, protons

  • electrons go to PSII
  • Protons go through ATP-synthase
27
Q

PSI Reduction

A
  1. Light energy excites pigment in PSI
  2. RET
  3. Reaction center loses an electron
  4. Electron travels down electron transport proteins
  5. Electron reduces NADP+ to NADPH
28
Q

Where does PSII get electrons replaced from?

A

Photolysis

29
Q

Where does PSI get electrons replaced from?

A

PSII

30
Q

Energy products from light reactions

A

6 ATP from PSII
6 NADPH from PSI
-Goes to Calvin Cycle

31
Q

Cyclic Electron Flow

A

Electrons lost by PSI can be used to pump protons across the membrane

  • Generates extra ATP needed for Calvin Cycle
  • Doesn’t reduce NADP+
  • The electron is passed back to PSI

Botony (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions