Cellular Metabolism I

Question 1

External respiration

Answer 1

Outside to alveoli

Question 2

Internal respiration

Answer 2

Blood to tissues

Question 3

Cellular respiration

Answer 3

C6H12O6 + 6O2 -> 6CO2 + 6H2O + ATP

Process ran by oxidation; glucose is oxidized

Question 4

Oxidation

Answer 4

Loss of electrons; C-H -> C-O

Question 5

C-H bond

Answer 5

High in energy

Question 6

CO2

Answer 6

Most oxidized form of carbon, is a waste product of cellular respiration.

Question 7

Reduction

Answer 7

Gain of electrons; C-O -> C-H

Question 8

Adenosine triphosphate (ATP)

Answer 8

RNA nucleotide composed of adenine, ribose sugar and 3 phosphodiester bonds. The bonds are unstable and very reactive. When 1 phosphate is removed, lots of energy is released. Reusable molecule, can change ADP + Pi back to ATP

Question 9

Glycolysis location

Answer 9

Cytosol of cells

Question 10

Glycolysis oxygen requirement

Answer 10

Anaerobic, no oxygen needed

Question 11

Glycolysis start and end products

Answer 11

Start: 1 glucose (1 x 6C)
End: 2 pyruvate (2 x 3C), 2 net ATP (4 ATP formed but 2 ATP used), 2 NADH (electron carrier, reduced version of NAD+, 2 electrons & 1 H+)

Question 12

Glycolysis: Hexokinase

Answer 12

First step in glycolysis, adds a phosphate to glucose, glucose -> glucose-6-phosphate, process stops glucose from leaving the cell, the phosphate is taken from ATP, results in ADP + Pi

Question 13

Glycolysis: Phosphofructokinase (PFK)

Answer 13

Rate limiting step, takes phosphate from ATP, fructose-6-phosphate -> fructose-1,6-bisphosphate