Describe how acids affect proteins in the body.
What do you think people mean when they say
someone has a fast metabolism?
Guided Notes: pH and Protein
Anabolic vs Catabolic reactions
The word metabolism refers to all of the chemical
reactions that take place within living things
There are 2 types of metabolic reaction
1) Anabolic Reactions
Building large molecules from small ones
Anabolic reactions require energy
2) Catabolic Reactions
Tearing apart large molecule into small ones
Catabolic reactions release energy
Photosynthesis is a chemical reaction in which
plants combine water and carbon dioxide gas to
create glucose (sugar).
Oxygen gas is given off as a waste product.
Photosynthesis is Anabolic
Photosynthesis is considered an anabolic
process for 2 reasons
It combines small molecules to make large.
Making a single molecule of glucose requires
6 waters and 6 carbon dioxides.
It requires energy. Photosynthesis is only
possible when the plant absorbs energy from
In order to use the energy stored in glucose, the
molecule must be broken apart.
There are 2 types of catabolic reactions
Respiration: Aerobic (requires oxygen)
Fermentation: Anaerobic (Doesn’t require oxygen)
Cellular Respiration uses oxygen to break
down food. When glucose is broken down it
Water and Carbon Dioxide are created as
Fermentation is a way to break down glucose
without using oxygen, but produces less
Fermentation is done by many bacteria, and by
animals when they are “short of breath”.
2 types of fermentation
Alcohol: Done by fungi and bacteria
Lactic Acid: Done by bacteria and animals
produces 2 waste products
Carbon Dioxide Gas
Beer is created by allowing
yeast to digest barley grain.
In fact, all alcoholic
beverages are created by the
digestive process of
Lactic Acid Fermentation
Lactic Acid fermentation is
used in the production of
dairy items like cheese and
Humans also produce lactic
acid in their muscles during
intense exercise. The
buildup of this acid explains
why your muscles burn after