Block 1 Lecture 8

Question 1

what is the function of mitochondria

Answer 1

cellular respiration and ATP homeostasis, programmed cell death

Question 2

what are some characteristics of mitochondria

Answer 2

• usually rod shaped
• has 2 membranes
• outer membrane is the boundary
• inner membrane is folded so the parts project inward (called cristae mitochondriales)

Question 3

what is the function of cristae mitochondriales

Answer 3

increases surface area

Question 4

what are the 3 types of protein in the inner membrane of mitochondria

Answer 4

• molecules in the ETC
• ATp synthase
• transport proteins

Question 5

what does the mitochondrial matrix contain

Answer 5

• enzymes required for oxidation of pyruvate and fatty acids for citric acid cycle
• contains mitochondrial DNA, special mitochondrial ribosomes, tRNAs and various enzymes that are required for expression of the mitochondrial genes

Question 6

what is chemiosmotic coupling used for

Answer 6

mitochondria use it to harness energy

Question 7

what are the 4 complexes

Answer 7

1- NADPH oxidase
2-succinate reductase
3-cytochrome bc 1
4-cytochrome oxidase

Question 8

what is the proton gradient of the inner mitochondrial membrane

Answer 8

150-200 mV

Question 9

what happens in the cytoplasm

Answer 9

glycolysis produces net 2 ATP per glucose molecule

Question 10

what happens in mitochondrion

Answer 10

the Krebs cycle and the conversion of pyruvate to acetyl coA and the ETC produce 34 ATP molecules per glucose molecule

Question 11

what do mitochondria recyle

Answer 11

ADP to ATP