Cellular respiration: aerobic respiration

Question 1

define cellular respiration

Answer 1

a series of enzyme catalysed chemical reactions that convert chemical energy stored in glucose molecule to ATP

Question 2

define aerobic respiration

Answer 2

oxidation of glucose in presence of o2with release of large amt of energy

Question 3

write down the word and chemical equation of aerobic respiration

Answer 3

word: glucose + oxygen –> carbon dioxide + water + large amt of energy
chemical: c6h12o2 + 6 o2 –> 6 co2 + 6 h2o + large amt of ATP

Question 4

where does glycolysis take place?

Answer 4

cytoplasm

Question 5

what are the net input reactants and products for glycolysis?

Answer 5

reactants: glucose + 2 ADP + 2 NAD+ + 2 Pi
products: 2 pyruvate + 2 ATP +2NADH

Question 6

what is the purpose of NAD?

what is the oxidised and reduced form of NAD?

Answer 6

purpose: serve as mobile electron carrier
oxidised form: NAD+
reduced form: NADH

Question 7

where does link reaction take place?

Answer 7

mitochondrial matrix

Question 8

what are the 3 steps of link reaction?

Answer 8

1. decarboxylation (removal of co2)
2. oxidation (remove H+ from pyruvate, H+ added to NAD+ to form NADH
3. addition of coenzyme A to form acetyl-CoA

Question 9

what are the reactants and products per pyruvate during link reaction?

Answer 9

reactants: pyruvate + NAD + CoA
products: acetyl CoA + NADH + co2

Question 10

what are the reactants and products per glucose molecule during link reaction?

Answer 10

reactants: 2 pyruvate + 2 NAD + 2 CoA
products: 2 acetyl CoA + 2 NADH + 2 co2

Question 11

where does the Krebs cycle take place:

Answer 11

mitochondrial matrix

Question 12

what are the reactants and products per acetyl-CoA

Answer 12

reactants: acetyl-CoA + 3NAD+ +FAD + ADP + Pi
products: 2 co2 + 3NADH + FADH2 + ATP

Question 13

what are the reactants and products per glucose molecule and how many rounds are needed

Answer 13

reactants: 2 acetyl-CoA + 6NAD+ + 2 FAD + 2ADP + 2Pi
products: 4 co2 + 6NADH + 2FADH2 + 2ATP

2 rounds

Question 14

function of NAD+ and FAD

Answer 14

serve as mobile electron carriers, able to receive electrons(gets reduced) and donate electrons(gets oxidised)

Question 15

list the products per glucose molecule for glycolysis, link reaction and krebs cycle and the total (in terms of co2, ATP, NADH, FADH2)

Answer 15

glycolysis: 2 ATP , 2NADH
link reaction: 2 co2, 2 NADH
krebs cycle: 4 co2, 2 ATP , 6 NADH, 2 FADH2
total: 6 co2, 4 ATP, 10 NADH, 2 FADH2