Chapter 8 Photosynthesis Flashcards

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1
Q

Photosynthesis

A

The process that converts solar energy into chemical energy

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2
Q

Autotrophs

A

Sustain themselves without eating anything derived from other organisms

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3
Q

Producers of the biosphere

A

Autotrophs

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4
Q

Heterotrophs

A

Obtain their organic material from other organisms

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5
Q

Consumers of the biosphere

A

Heterotrophs

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6
Q

________are the major locations of photosynthesis

A

Leaves

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7
Q

Chloroplasts are found mainly in cells of the __________

A

Mesophyll, the interior tissue of the leaf

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8
Q

CO2 enters and O2 exits the leaf through microscopic pores called __________

A

Stomata

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9
Q

The chlorophyll is in the membranes of ______________

A

Thylakoids-connected sacs in the chloroplast

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10
Q

Thylakoids may be stacked in columns called

A

Grana

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11
Q

Chloroplast also contain_______ a dense interior fluid

A

Stroma

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12
Q

Equation for photosynthesis

A

6CO2 + 12H2O + light energy -> C6H12O6 + 6O2 + 6 H2O

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13
Q

Chloroplasts split _______ into hydrogen and oxygen

A

H2O

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14
Q

Photosynthesis is a redox process in which H2O is oxidized and _______ is reduced

A

CO2

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15
Q

Photosynthesis is an _____________ process ; the energy boost is provided by light

A

Endergonic

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16
Q

Photosynthesis consists of the _________ cycle and the __________ __________ cycle

A

Light, Calvin

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17
Q

The light reactions:

A

Split H2O

Release O2

Reduce the electron acceptor NADP+ to NADPH

Generate ATP from ADP by adding a phosphate group, photo phosphorylation

18
Q

The Calvin Cycle:

A

In the stroma, forms sugar from CO2, using ATP and NADPH

19
Q

The Calvin cycle begins with __________, incorporating CO2 into organic molecules

A

Carbon fixation

20
Q

Thylakoids transform

A

Light energy into the chemical energy of ATP and NADPH

21
Q

Light is a form of

A

Electromagnetic energy also called electromagnetic radiation

22
Q

Wavelength is the

A

Distance between waves

23
Q

Wavelength determines

A

The type of electromagnetic energy

24
Q

The electromagnetic spectrum is the

A

Entire range of electromagnetic energy

25
Q

Visible light consists of wavelengths that

A

Produce color we can see

26
Q

Light behaves as though it consists of discrete particles called

A

Photons

27
Q

Visible light spectrum is from ________ to _________

A

380 nm to 750 nm

28
Q

Shorter wavelength equals _________ energy while longer wavelength equals ________ energy

A

Higher, lower

29
Q

Pigments are substances that

A

Absorb visible light

30
Q

Wavelengths that are not absorbed are

A

Reflected or transmitted

Leaves appear green because chlorophyll reflects and transmits green light.

31
Q

A spectrophotometer measures

A

A pigments ability to absorb various wavelengths

32
Q

An absorption spectrum is a graph that plots a

A

Pigments light absorption versus wavelengths

33
Q

The absorption spectrum for chlorophyll suggests that

A

Violet blue and red light work best for photosynthesis

34
Q

Accessory pigments include chlorophyll B and a group of pigments called

A

Carotenoids

35
Q

An __________ spectrum profiles the relative effectiveness of different wavelengths of radiation on a driving process

A

Action

36
Q

The main photosynthetic pigment is

A

Chlorophyll A

37
Q

Accessory pigments

A

Broaden the spectrum used for photosynthesis

38
Q

Accessory pigments called _________ absorb excessive light that would damage chlorophyll

A

Carotenoids

39
Q

Three phases of the Calvin cycle

A

Carbon fixation

Reduction

Regeneration of the CO2 receptor

40
Q

CAM plants

A

Crassulacean acid metabolism plants open their stigmata at night incorporating CO2 into organic acids