Ch.10: Photosynthesis Flashcards

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1
Q

is the process that converts solar energy into chemical energy
Directly or indirectly, XXXXX nourishes almost the entire living world

A

photosynthesis

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2
Q

The energy that maintains almost all life on Earth comes from

A

the sun

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3
Q

Reactants and Products of Photosynthesis

A

Reactants: Carbon dioxide &water
Products: Sugar, Water, & Oxygen

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4
Q

Characteristics of Autotrophs

A

sustain themselves without eating anything derived from other organisms
PRODUCERS: producing organic molecules from CO2 &other inorganic molecule

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5
Q

Almost all plants are ____________, using the energy of sunlight to make organic molecules from H2O and CO2

A

photoautotrophs

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6
Q

the entire range of electromagnetic energy, or radiation

A

electromagnetic spectrum

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7
Q

consists of wavelengths (including those that drive photosynthesis) that produce colors we can see

A

visible light

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8
Q

What color light does not get absorbed by photosynthesis

A

green

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9
Q

Wavelength and Energy correlation

A

longer wavelength = low energy

shorter wavelength = high energy

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10
Q

is the main photosynthetic pigment

A

chlorophyll

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11
Q

Accessory pigments, such as __________, broaden the spectrum used for photosynthesis

A

chlorophyll b

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12
Q

Accessory pigments called _________ absorb excessive light that would damage chlorophyll

A

carotenoids

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13
Q

Where does photosynthesis take place?

A

chloroplast

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14
Q

are the major locations of photosynthesis, contain the majority of chloroplast

A

leaves

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15
Q

Chloroplasts are found mainly in cells of the ________, the interior tissue of the leaf

A

mesophyll

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16
Q

true or false. Only leaves contain chloroplast

A

False. Green stems also contain some chloroplasts

17
Q

Photosynthesis consists of the _______ _____ (the photo part) and ______ _______ (the synthesis part)

A

light reactions & Calvin cycle

18
Q

The light reactions (in the thylakoids) include:

A

Split H2O
Release O2
Reduce NADP+ to NADPH
Generate ATP from ADP

19
Q

The Calvin cycle: (C3 Pathway

A
Carbon-Fixation Reactions
ATP and NADPH from light reactions are used to synthesize sugars
Carbon from CO2 is used 
Enters through stomata 
Occurs in the stroma
20
Q

Antenna Complex:

A

Contains 250-400 pigment molecules
Gather and funnel light energy to a Reaction Center
Allows for light energy to be converted to chemical energy

21
Q

Under hot, arid conditions, leaves lose water by evaporation through openings in the leaves called

A

Stomata

22
Q

To prevent excessive water loss what occurs in the stomata

A

Stomata will close to conserve water, but Carbon dioxide can not enter.

23
Q

Define C4 Plants

A

Do use Calvin cycle but are capable of storing carbon in a 4-C organic molecule
Cycles are separated into different cells
Carbon is pumped into Calvin cycle
More energy is required to fix carbon
Less water is lost to photorespiration

24
Q

Characteristics and example of C4 plants

A

Evolved in the tropics, Adapted to high light, High temps, Arid climates
Many grasses:Maize,Sugarcane,Sorghum

25
Q

CAM Photosynthesis

A

Crassulacean acid metabolism
These plants use C4 and Calvin cycle
Reactions are separated in time not location
Stomata are only open at night when temps. are cooler.
Succulents
Cacti

26
Q

________ made in the chloroplasts supplies chemical energy and carbon skeletons to synthesize the organic molecules of cells

A

sugar

27
Q

The energy entering chloroplasts as sunlight gets ______ as chemical energy in organic compounds

A

stored

28
Q

Plants store excess sugar as_______ in structures such as roots, tubers, seeds, and fruits

A

starch