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65 Terms

1

Energy

The ability to do work or cause change.

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2

ATP

an organic molecule used for short-term energy storage and transport in cells.

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3

Hydrolysis

The reaction of an organic chemical with water to form two or more new substances, often involving the cleavage of chemical bonds.

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4

ATP-ADP Cycle

The reversible process of converting ATP to ADP and vice versa, where ATP stores energy and ADP needs to be recharged to be used as a power source.

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5

Energy coupling

The transfer of energy from one chemical reaction to another, where an energetically favorable reaction (exergonic) is linked with an energetically unfavorable reaction (endergonic).

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6

Exergonic reaction

A reaction where energy is released to the surroundings, with the bonds being formed stronger than the bonds being broken.

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7

Endergonic reaction

A reaction where energy is absorbed from the surroundings, with the bonds being formed weaker than the bonds being broken.

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8

Glucose

A simple sugar and an important source of energy in cells.

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9

Polypeptide

A chain of amino acids linked by peptide bonds, forming a protein.

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10

Glycolysis

The metabolic pathway that converts glucose into pyruvate, producing ATP.

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11

Oxidative phosphorylation

The process of generating ATP through the transfer of electrons in the electron transport chain.

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12

ADP

the uncharged form of ATP that needs to be recharged to regain its energy.

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13

Chemical reaction of atp to adp

ATP + H2O → ADP + Pi + energy

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14

Chemical reaction of ADP to ATP

ADP + Pi (inorganic phosphate) + energy → ATP + H20


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15

Light-Independent Reaction

Chemical reactions during photosynthesis that convert carbon dioxide and other compounds into glucose, taking place in the stroma.

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16

Rubisco

A plant enzyme which catalyzes the fixing of atmospheric carbon dioxide during photosynthesis by catalyzing the reaction between carbon dioxide and RuBP.

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17

Ribulose Bisphosphate

An organic substance that is involved in photosynthesis, reacts with carbon dioxide to form 3-PGA.

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18

Fixation

RuBisCO catalyzes a reaction between CO2 and RuBP, which forms a six-carbon compound that is immediately converted into two three-carbon compounds.

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19

Reduction

ATP and NADPH use their stored energy to convert the three-carbon compound, 3-PGA, into another three-carbon compound called G3P

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20

Regeneration

One of the G3P molecules leaves the Calvin cycle to contribute to the formation of the carbohydrate molecule which is commonly glucose

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21

Photosynthesis

The process through which light energy is converted into chemical energy stored in sugar and other molecules.

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22

Heterotrophic nutrition

One of the two major modes by which organisms acquire organic compounds for energy, where they are unable to make their own food and live on compounds produced by other organisms.

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23

Heterotrophs

Organisms that are unable to make their own food and live on compounds produced by other organisms.

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24

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26

Stomata

Tiny openings on the surface of leaves that allow gases, such as carbon dioxide and oxygen, to enter and exit.

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27

Chloroplasts

Organelles found in plant cells that contain chlorophyll and are the site of photosynthesis.

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28

Grana

Stacks of thylakoid sacs found within chloroplasts.

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29

Chlorophyll

The green pigment found in thylakoid membranes that absorbs light during photosynthesis.

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30

Photosystems

Groups of pigments and proteins located in the thylakoid membranes that initiate the light-dependent reactions of photosynthesis.

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31

Light-Dependent Reactions

The first stage of photosynthesis, which involves the absorption of light energy and the conversion of that energy into chemical energy in the form of ATP and NADPH.

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32

Calvin cycle

The second stage of photosynthesis, which involves the conversion of carbon dioxide into sugar using the energy stored in ATP and NADPH.

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33

Electron transport chain

A series of proteins located in the thylakoid membrane that transfer electrons during the light-dependent reactions of photosynthesis.

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34

ATP synthase

A transmembrane protein complex that uses the energy from the movement of hydrogen ions to synthesize ATP.

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35

Chemiosmosis

The process by which hydrogen ions move through ATP synthase, allowing the synthesis of ATP.

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36

NADPH

An energy carrier molecule that is formed during the light-dependent reactions of photosynthesis and is used in the Calvin cycle.

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37

Solar energy

Energy from sunlight that is captured and converted into chemical energy during photosynthesis.

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38

Aerobic Respiration

A set of metabolic reactions that occur in the presence of oxygen in a cell to convert chemical energy into ATPs.

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39

Anaerobic Respiration

A process of cellular respiration where the high energy electron acceptor is neither oxygen nor pyruvate derivatives.

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40

Electron Acceptor

A molecule that accepts electrons during cellular respiration.

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41

ATP

a molecule that stores and releases energy for cellular processes.

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42

Glycolysis

The first step of cellular respiration, where glucose is broken down into pyruvic acid.

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43

Krebs Cycle

A series of chemical reactions that occur in the mitochondria during aerobic respiration to produce ATP.

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44

Mitochondria

Organelles in eukaryotic cells where aerobic respiration takes place.

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45

Carbon Dioxide

A gas produced as a by-product of aerobic respiration.

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46

Water

A molecule produced as a by-product of aerobic respiration.

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47

Oxidation

The process of losing electrons during cellular respiration.

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48

Location

Aerobic respiration occurs in the mitochondria of eukaryotic cells, while anaerobic respiration occurs in the cytoplasm of both eukaryotic and prokaryotic cells.

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49

End Products

The final products of aerobic respiration are carbon dioxide, water, and energy, while the end products of anaerobic respiration can include acids, alcohols, gases, and energy.

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50

Nature of the Process

Aerobic respiration is comparatively longer and more efficient than anaerobic respiration.

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51

Glucose

The main fuel source for aerobic respiration.

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52

Oxygen

The electron acceptor in aerobic respiration.

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53

Sulfur and Nitrogen

Other electron acceptors that can be used in anaerobic respiration.

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54

Sunlight

The initial source of energy for photosynthesis, which is converted into chemical energy in the form of glucose.

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55

Chloroplasts

Organelles in plant cells where photosynthesis takes place.

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56

Chlorophyll

A green pigment found in plants that is responsible for absorbing light energy for photosynthesis.

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57

Pigments

Colorful compounds that absorb light from the sun.

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58

Chloroplasts

Specialized structures in plant cells where photosynthetic pigments are located.

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59

Accessory pigments

Other pigments in plants that absorb wavelengths of light that chlorophyll cannot effectively absorb.

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60

Chlorophyll a

The core pigment in plants that absorbs sunlight for photosynthesis.

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61

Chlorophyll b

A pigment similar to chlorophyll a but with a slightly different absorption spectrum.

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62

Carotenoids

Pigments that absorb light from violet to greenish-blue range and appear yellow or yellow-orange.

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63

Anthocyanins

Pigments that give color to flowers, leaves, and fruits and can appear red, purple, or blue.

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64

Xanthophylls

Pigments that pass along light energy to chlorophyll a and act as antioxidants.

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65

Mesophyll cells

Photosynthetic cells in plant leaves where chloroplasts and pigments are located.

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