Respiration Flashcards
1
Q
where is mitochondria the site of?
A
aerobic resp
(link reaction, krebs cycle, OP)
2
Q
what are cristae and how are they useful?
A
- fold in inner memb of mitoch
- inc surface area for OP
3
Q
what is a respiratory substrate?
A
any biological molecule that can be respired to release energy
4
Q
when are proteins only respired?
A
when no lipids / carbs
5
Q
link reaction
A
- pyruvate dehydrogenated and decarboxylated
- = acetate
- acetate combines with coA = acetylcoA
- CO2 formed
- NADH formed
6
Q
how many times does link reaction happen for 1 glucose mol?
A
2x
7
Q
define dehydrogenation?
A
removal of H mol
8
Q
define decarboxylation?
A
removal of CO2 mol
9
Q
krebs cycle
A
- matrix of mitochondria
- acetylcoA joins 4C comp = 6C comp
- 6C mol decarboxylated = 5C comp
- dehydrogenation
- substrate level phosphorylation
- 3 NADH, 1 FADH, 1 ATP, 2 CO2 formed
10
Q
what is substrate level phosphorylation?
A
creation of ATP without ATP synthase
- phosphate added to ADP from another mol
11
Q
oxidative phosphorylation
A
- electrons and protons rel from reduced coenzymes
- electrons flow along ETC
- in series of redox reactions
- electrons rel energy to join ADP and Pi = ATP
- oxygen = final electron acceptor - combines with electrons and protons = water
- OP makes most of ATP in resp
12
Q
where does glycolysis take place?
A
cytoplasm
13
Q
glycolysis in animals and bacteria
A
- glucose
- glucose phosphate
- hexose biphosphate
- 2 mol TP
- reduced to 2 pyruvate
- 2 lactate
14
Q
glycolysis in plants and yeast
A
- glucose
- glucose phosphate
- hexose biphosphate
- 2 mol TP
- 2 mol pyruvate
- 2 mol ethanal
- 2 mol ethanol
15
Q
what is needed for glycolysis?
A
NAD
16
Q
NAD is regenerated by..
A
reducing pyruvate
