BIOLOGY Amanda 3: ATP Production (Video + Overview + Detailed Notes)

Overview

(0:00-0:51) Cellular Respiration

(0:52-1:15) Stages of Cellular Respiration

(1:16-2:19) ATP

(2:20-3:04) Glycolysis

(3:05-3:54) The Krebs Cycle

(3:55-5:07) ETC

Terms to Know

Cellular Respiration

A process that occurs in cells as a means to produce ATP for the cell.

Glycolysis

The first stage of cellular respiration in which a molecule of sugar is broken down into two molecules of pyruvate.

The Krebs Cycle

The second stage of cellular respiration in which pyruvate is used to produce additional ATP, NADH and FADH2.

Electron Transport Chain

The third and final stage of cellular respiration in which energy from electrons is used to produce many molecules of ATP.

ATP

A nucleotide used by cells as a form of energy.

Detailed Notes

(0:00) Cellular Respiration

-Process that occurs in cells

-Produces ATP for cells

-ATP is produced by the breaking down of organic molecules such as glucose, lipids and proteins

(0:52) Stages of Cellular Respiration

-Glycolysis is the first stage

-Krebs Cycle is the second stage

-Electron Transport Chain is the third stage

(1:16) ATP

-ATP is a nucleotide with a ribose sugar, adenine base and 3 phosphate groups

-Different from DNA nucleotides because of the 3 phosphate groups

-Energy stored between 2^nd and 3^rd phosphate group

-Cells need ATP produced by cellular respiration to carry out all cell functions

(2:20) Glycolysis

-1^st step of cellular respiration

-Occurs in cytoplasm of the cell

-Glucose is broken down into a smaller molecule

-Products of gylcolysis move into the next step

(3:05) The Krebs Cycle

-2^nd step of cellular respiration

-Occurs in the mitochondria

-The mitochondria is the “powerhouse” of the cell

(3:55) ETC

-3^rd step of cellular respiration

-Occurs in the mitochondria

-1 molecule of glucose yields 36 molecules of ATP

-Most of the ATP is being produced by the ETC

-A minor amount of ATP is produced in glycolysis and the Krebs cycle