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Biology 224 > Chapter 8, Photosynthesis > Flashcards

Chapter 8, Photosynthesis Flashcards

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1
Q

Photosynthesis is the conversion of ______ energy to _______ energy

A

light, chemical

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2
Q

Heterotrophs

A

organisms which cannot make own food from simple carbon compounds

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3
Q

Autotrophs

A

organisms which can make own food from simple carbon compounds

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4
Q

Parts/Structures of Photosynthesis

A
  • Plants parts
  • basic reactants and products
  • light
  • pigments
  • photosystems
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5
Q

Reactants of photosynthesis

A

carbon dioxide, water, light (energy)

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6
Q

Products of photosynthesis

A

Food (carbohydrates), oxygen

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7
Q

Formula for photosynthesis

A

H2O+CO2–> C6H12O6 + O2

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8
Q

Water diffuses into plant through _____, travels up stem to the leaves, through the ______ in the vascular bundles

A

roots, Xylem

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9
Q

CO2 enters plants through microscopic pores called

A

stomata

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10
Q

Stomata located

A

on underside of leaves

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11
Q

Carbon dioxide and water enters plants through

A

diffusion

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12
Q

Light comes in particles termed _______

A

photons

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13
Q

Light also travels in ______

A

waves

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14
Q

Wavelength is

A

the distance from one wave peak to the next

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15
Q

Electromagnetic Radiation is

A

all forms of radiant energy, including visible light

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16
Q

Relationship between wavelength and energy is

A

inverse

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17
Q

the _______ wavelengths have _____ energy

A

longer, less shorter, more

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18
Q

Visible light spectrum ranges from

A

400-700 nm

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19
Q

White light composed of…

A

all the visible light, all colors

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20
Q

Pigments are

A

molecules that can absorb some wavelength but nor others

21
Q

How to pigments how color

A

Wavelength that are not absorbed are reflected (transmitted) so they can be seen

22
Q

An action spectrum is

A

a graph for entire plant, plotting photosynthetic activity (action) vs wavelength

23
Q

One can determine which of many pigments in a plant are the major ones for photosynthesis by

A

comparing absorption spectrum of each pigment with action spectrum

24
Q

Plant does __________ with the light absorbed

A

photosynthesis

25
Q

Chlorophyll is hydro________

A

hydrophobic

26
Q

___________ tail insert chlorophyll into the __________ membrane

A

hydrocarbon, thylakoid

27
Q

The head of chlorophyll has alternating ______ and _____ bonds

A

double, single

28
Q

These double and single bonds useful for

A

picking up and giving off extra electrons

29
Q

Chlorophyll a and b only differ in

A

one functional group

30
Q

There is a _____ group in chlorophyll a, and a _______ group in chlorophyll b

A

Carboxyl (COH) in a, and a Methyl (CH3) in b

31
Q

Photosystems are

A

clusters of pigments

32
Q

Photosystems contain the pigments

A

chlorophyll a and b, and some xanthophyll and carotene

33
Q

Photosystems can have ____-____ pigments

A

250-400

34
Q

Photosystems arranged so that light energy is passed from pigments that absorb ____ wavelength to those that absorb ______ wavelengths

A

shorter to longer

35
Q

There is a special pair of Chlorophyll ___ molecules the ultimately…

A

chlorophyll A, receive the energy/electrons from all other pigments, pass the actual electrons not just energy

36
Q

Photosystem I, chlorophyll a is _____

A

P700

37
Q

Photosystem II, chlorophyll a is ____

A

P680

38
Q

The numbers P700/P680 refers to

A

optimal absorption

39
Q

Chlorophyll a in Photosystems 1 and 2 pass high energy electrons to…

A

molecules outside the photosystem

40
Q

2 types of photosynthetic reactions

A
  • energy-transduction reaction
  • carbon-fixation reactions
41
Q

Energy transduction reactions are also called…..and they are involved with…

A

light reactions/light dependent reactions

energy transfer

42
Q

carbon fixed reaction are also called…involved with…

A

dark reactions/light independent reactions

CO2 fixed, enzymatically combined with, covalently bonded to RuBP

43
Q

Photolysis is when

A

water molecules get split, produces 2 electrons, 2H+, and 1/2 H2O

44
Q

Step 1 on light dependent reaction

A

noncyclic Photophosphorylation

energy/electron transfer –> NADPH

45
Q

Step 2 in light dependent reaction

A

Photolysis

splitting water

46
Q

Step 3 in light dependent reaction

A

chemiosmosis

making ATP

47
Q

Step 4 in light dependent reaction

A

Cyclic Photophosphorylation

energy/electron transfer

48
Q

**study steps in photosystem 1

A

Biology 224 (18 decks)

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