CH 7Lab Cellular Respiration Flashcards Preview

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Flashcards in CH 7Lab Cellular Respiration Deck (40):
1

What is the initial substrate for glycolysis?

Glucose

2

What are the final products of aerobic respiration?

ATP and CO2

3

During respiration does glucose get oxidized or reduced?

Oxidized to CO2 and H2O

4

What is the overall equation for glucose oxidation?

C6H12O6 + 6O2 goes to 6CO2 + 6H2O + energy

5

Why would it be a bad idea to transfer the electrons directly from the glucose molecule to oxygen?

Cannot harness energy

6

Give an example of spontaneous process?

Water flowing downhill

7

What happens in a redox reaction, give an example

Transfer of electrons between atomsAn object falling from from a location of high potential energy to a location of low potential energy

8

Why are partial electron transfers considered to be redox reactions?

Because one atom is more electronegative than the other which increases it's electron density

9

How can you estimate the relative energy content of an organic molecule?

Based on the number of c-c and c-H bonds

10

What are the four stages of cellular respiration and where in the cell do they take place?

Glycolysis: cytoplasmacetyl coa synthesis : mitochondriaCitric acid cycle: mitochondriaOxidative phosphorylation: mitochondria

11

How many carbon atoms are in glucose, pyruvate and acetyl coa?

632

12

Which form NAD+ or NADH is ready to accept electrons, give up electrons, oxidized and reduced?

NAD+ picks up electrons, reducedNADH give up two electrons, oxidized

13

Why are only 2 net ATP produced during glycolysis?

Because of the investment phase which costs 2 ATP

14

What high energy molecule are produced during glycolysis?

2 ATP and 2 NADH

15

Describe substrate level phosphorylation

Transfer of a phosphate group to ADP from an organic donor moleculeProduces small amount of ATP

16

Describe oxidative phosphorylation

ATP is indirectly formed by the transfer of high energy electrons.Oxidizing nutrients to form ATPExtra phosphate comes from inorganic phosphate

17

Where does substrate level phosphorylation occur?

Glycolysis and kerbs cycle

18

Where does oxidative phosphorylation occur

Electron transport chain

19

What happens to pyruvate in the living step between glycolysis and the krebs cycle?

Gets converted to acetyl coa and produce an NADH

20

How many carbons are in the last intermediate step of the Krebs cycle before the actyl group is added?

4

21

How many carbons are in the first intermediate step of the Krebs cycle before the actyl group is added? What is the name of the molecule?

6 Citric acid

22

Beside ATP what other high energy molecules are produced during the Krebs cycle?

NADH and FADH2

23

When is co2 produced during cell respiration?

During the Krebs cycle

24

Where is the etc located?

Inner Cell membrane of the mitochondrion

25

What is the function of oxygen in the etc?

It's a product that occurs when cytochrome c moves into complex 4 where oxygen is reduced to form water

26

Where does fadh2 drop off its electron on the etc?

Complex 2

27

Are H+ pumped into or out of the matrix during electron transport?

Out of the mitochondrial matrix

28

Why does it require energy for electrons to be pumped trough the etc?

Because it pumping against their concentration gradient

29

How do H+ electrons find their way to ATP synthase?

They go down their concentration gradient

30

Does FADH2 produce as much ATP as NADH? Why or why not?

NoBecause NADH is pumped through complex 1 which allows it to pump more H+ before FADH2 can give up electron to complex 2

31

Which pathways produces the most ATP?

The electron transport chain

32

Where does glycolysis, CAC, ETC take place in a eukaryotic cell?

Cytosol, mitochondria, mitochondria

33

When is NADH released during glycolysis?

When a C-H bond is broken

34

When is ATP produced during glycolysis?

When a phosphate group attaches to a pyruvate

35

When is NADH produce during the Krebs cycle?

When a C-H bond is broken

36

How many carbons do pyruvate have before it's converted into acetyl coa and after?

3 and acetyl coa has 2

37

When is co2 produced during the kreb cycle?

When a C-C bond is broken

38

What are the net gains after glycolysis?

2 ATP 2 NADH 2 pyruvate

39

What is the net gain after the Krebs cycle?

2 ATP8 NADH2 FADH2

40

How much ATP does one molecule of NADH and fadh2 make?

NADH makes 2.5 ATPFadh2 makes 1.5