Unit 3: Cellular Energetics (copy)

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58 Terms

1

hydrogen ions

As the ________ move back into the stroma through ATP synthase, ATP is produced.

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2

Photosynthesis

________ is the process by which light energy is converted to chemical energy.

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3

Autotrophs

________ are using light and ADP and phosphates (thats phosphorylation) to produce ATP.

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4

Yeast cells

________ and some bacteria make ethanol and carbon dioxide.

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5

NAD+

________ and NADH are constantly being turned into each other as electrons are being carried and then unloaded.

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6

anaerobic version of respiration

When oxygen is not available, the ________ occurs.

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7

ATP

________ consists of a molecule of adenosine bonded to three phosphates.

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8

Enzymes

________ are biological catalysts that speed up reactions which is by lowering the activation energy and helping the transition state to form.

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9

II

Photosystem I and photosystem ________ were numbered in order of their discovery, not the order they are used in photosynthesis.

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10

Glycolysis

________ also gives two pyruvates and two NADH.

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11

transport chain

The electron ________ stops working, and electron carriers have nowhere to drop their electrons.

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12

Vitamins

________ are examples of organic coenzymes.

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13

enzymatic activity

A cell can control ________ by regulating the conditions that influence the shape of the enzyme.

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14

Cellular respiration

________ is a process of breaking down sugar and making ATP.

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15

thylakoid

To replenish the electrons in the ________, water is split into oxygen, hydrogen ions, and electrons.

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16

strict set of biological

Because the fit between the enzyme and the substrate must be perfect, enzymes operate only under a(n) ________ conditions.

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17

Krebs cycle

The ________ occurs in the mitochondrial matrix.

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18

Pyruvic acid

________ is transported to the mitochondrion.

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19

absorption spectrum

A(n) ________ shows how well a certain pigment absorbs electromagnetic radiation.

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20

Oxygen

________ combines with these electrons (and some hydrogens) to form water.

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21

light absorbing

They contain chlorophyll, a(n) ________ pigment that drives photosynthesis, as well as enzymes involved in the process.

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22

dark reactions

The ________ are also called the Calvin- Benson Cycle.

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23

consequence of anaerobic respiration

A cramp was possibly the ________.

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24

P680

When a leaf captures sunlight, the energy is sent to ________, the reaction center for photosystem II.

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25

Enzymatic reactions

________ can be influenced by a number of factors, such as temperature and pH.

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26

Exergonic reactions

________ are those in which the products have less energy than the reactants.

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27

Aerobic respiration

________ consists of four stages containing a series of coupled reactions that establish an electrochemical gradient across membranes:

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28

frequency of collisions

An increase in the temperature of a reaction increases the ________ among the molecules.

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29

pyruvate

The ________ turns into either lactic acid (in muscles) or ethanol (in yeast)

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30

Citrate

________ gets turned into several other things, and because the cycle begins with a four- carbon molecule, oxaloacetate, it eventually gets turned back into oxaloacetate to maintain the cycle by joining with the next acetyl- CoA coming down the pipeline.

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31

photolysis

The electrons from ________ replace the missing electrons in photosystem II.

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32

function of radiation

Light absorbed is plotted as a(n) ________ wavelength.

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33

Cofactors

________ can be either organic molecules called coenzymes or inorganic molecules or ions.

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34

Carbon fixation

________ means is that CO2 from the air is converted into carbohydrates.

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35

mitochondria

In the ________, pyruvate is turned into acetyl- CoA and 1 NADH is made; double this if you are counting per glucose.

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36

course of a reaction

The ________ can be represented by an energy diagram.

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37

Organisms

________ can use exergonic processes that increase energy, like breaking down ATP, to power endergonic reactions, like building organic macromolecules.

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38

Law of Thermodynamics

First ________: Cells can not take energy out of thin air.

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39

second electron

The electrons are passed through a(n) ________ transport chain until they reach the final electron acceptor NADP+ to make NADPH.

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40

Glycolysis

________ also creates two NADH, which result from the transfer of electrons to the carrier NAD+, which then becomes NADH.

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41

autotrophs

In ________, the sugar is made during photosynthesis.

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42

Enzymes

________ can be turned on or off by things that bind to them.

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43

ATP

In photosynthesis, protons are pumped from the stroma into the thylakoids compartment, and they return to the stroma through a(n) ________ synthase down their concentration gradient.

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44

Krebs cycle

The ________ begins with each molecule of acetyl- CoA produced from the second stage of aerobic respiration combining with oxaloacetate, a four- carbon molecule, to form a six- carbon molecule, citric acid or citrate.

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45

P680

The activated electrons are trapped by ________ and passed to a molecule called the primary acceptor, and then they are passed down to carriers in the electron transport chain.

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46

dark reactions

The ________ use the products of the light reactions- ATP and NADPH- to make sugar.

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47

hydrogen ions

The energy released from the electron transport chain is used to pump ________ across the inner mitochondrial membrane from the matrix into the inter- membrane space.

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48

enzymatic reactions

In ________, the targeted molecules are known as substrates.

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49

pyruvate

The ________ and NADH make a deal with each other, and ________ helps NADH get recycled back into NAD+ and takes its electrons.

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50

transport chain

The electrons travel down the electron ________ until they reach the final electron acceptor, oxygen.

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51

First Law of Thermodynamics

Cells cannot take energy out of thin air

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52

Second Law of Thermodynamics

It states that energy transfer leads to less organization

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53

Enzymes Do

increase the rate of a reaction by lowering the reactions activation energy form temporary enzyme-substrate complexes remain unaffected by the reaction

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54

Enzymes Dont

change the reaction make reactions occur that would otherwise not occur at all

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55

C4 plants produce a four

carbon molecule as the first product of carbon fixation and perform cyclic electron flow in the light reactions

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56

Glucose is a six-carbon molecule that is broken into two three

carbon molecules called pyruvic acid

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57

In the mitochondria, pyruvate is turned into acetyl

CoA and 1 NADH is made; double this if you are counting per glucose

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58

The mitochondrial production of acetyl

CoA and the Krebs cycle cease too

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