Mitochondria

Question 1

Mitochondria cell volume

Answer 1

22%, 1700 per cell.

Question 2

Are mitochondria associated with microtubules

Answer 2

Yes

Question 3

Mitochondria structure

Answer 3

Outer membrane, intracristal space, inner membrane, matrix.

Question 4

Outer membrane

Answer 4

Permeable to small molecules, contains porins.

Question 5

Matrix

Answer 5

Contains Krebs cycle. Slightly higher pH

Question 6

Inner membrane

Answer 6

Has electron transport chain. Pumps hydrogen from matrix to membrane space. Makes electrochemical gradient

Question 7

ATP synthase speed

Answer 7

100 ATP/sec. turns electrochemical to mechanical.

Question 8

ATP antiporter

Answer 8

ATP out ADP in. Driven by electron gradient.

Question 9

Brown fat mitochondria

Answer 9

In infants. Makes heat instead of ATP. Used thermogenin

Question 10

Other mitochondria functions

Answer 10

Apoptosis, calcium, aging

Question 11

How do proteins enter mitochondria

Answer 11

Unfolded, passed through, cleaved, remolded.

Question 12

Mitochondria dna

Answer 12

Circular, UGA isn’t stop codon. Own genetic code

Question 13

Peroxisomes

Answer 13

Most in liver and kidney. Degrades toxins, oxidates fatty acids.

Question 14

Peroxisome contents

Answer 14

Oxidase and catalase.

Question 15

Heteroplasmic

Answer 15

Mixture of normal and mutant mitochondria

Question 16

Where are peroxisomes from?

Answer 16

ER