Respiration Flashcards

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1
Q

what is respiration

A

process that occurs in living cells and releases the energy stored in organic molecules

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2
Q

anabolic reactions

A

where large molecules are synthesised from smaller molecules

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3
Q

catabolic

A

involving hydrolysis of large molecules to smaller ones

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4
Q

ATP

A

the standard intermediary (energy currency molecule) between energy-releasing and energy-consuming metabolic reactions in eukaryotic and prokaryotic, releases energy in small manageable amounts

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5
Q

respiration equation

A

glucose + oxygen –> carbon dioxide + water + ATP

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6
Q

glycolysis

A

a 10 stage biochemical pathway that occurs in the cytoplasm of all living organisms that respire, including prokaryotes converting glucose to pyruvate

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7
Q

4 stages of respiration

A

glycolysis, link reaction, krebs cycle, oxidative phosphorylation

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8
Q

when does glycolysis occur

A

in aerobic and anaerobic respiration

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9
Q

what does NAD/FAD do

A

carry the hydrogen to the ETC on the cristae

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10
Q

what does CoA do

A

carries the acetyl group into the Krebs cycle

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11
Q

where is oxaloacetate found

A

mitochondrial matrix

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12
Q

how many turns of the krebs cycle for every molecule of glucose

A

2

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13
Q

chemiosmosis

A

the flow of protons down their concentration gradient across a membrane through ATP synthase enzymes- the force of flow allows production of ATP

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14
Q

final electron acceptor in OP

A

molecular oxygen

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15
Q

how do fungi and plants reoxidise NADH during anaerobic respiration

A

ethanol fermentation pathway

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16
Q

how do mammals reoxidise NADH during anaerobic respiration

A

lactate fermentation pathway

17
Q

hydrogen acceptor in the lactate fermentation pathway

A

pyruvate

18
Q

hydrogen acceptor in ethanol fermentation pathway

A

ethanal

19
Q

respiratory substrates

A

an organic substrate that can be oxidised by respiration, releasing energy to make ATP molecules and water, co2

20
Q

greater the proportion of hydrogen atoms in a respiratory substrate molecule…

A

the more oxygen needed for its respiration bc protons combine with oxygen to form water

21
Q

why can fatty acids and amino acids can only be respired aerobically

A

they cannot undergo glycolysis

22
Q

decarboxylation

A

removal of a carboxyl group from a substrate molecule

23
Q

dehydrogenation

A

removal of hydrogen atoms from a substrate molecule

24
Q

substrate-level phosphorylation

A

production of ATP from ADP+Pi during glycolysis and krebs cycle

25
Q

oxidative phosphorylation

A

formation of ATP using energy released in the ETC and in presence of oxygen

26
Q

what occurs in muscle tissue if lactate remains

A

cause muscle fatigue, reducing the pH (increasing acidity by lactic acid) and reducing enzyme activity