1. sugar- hiding in plain sight
Aim: What is our food made up of? HW: ???? (none if I don’t use more than once!) Do Now: Sugar- Is it good or bad? WHY? What type of nutrient is it (carbohydrate/lipid/fat)?
sugar- hiding in plain sight

2. The Chemistry of Nutrition

3. Chemistry Introduction
Chemistry = the study of all substances and the changes that happen to them

4. Matter Matter=“stuff”
Matter is anything that occupies space and has mass.
Matter=“stuff”

5. Why we need to study chemistry in a biology class:
All living things are:
- made up of matter
- made up of the same chemical building blocks
- depend on chemical processes for survival
ex: cellular respiration

6. Building Blocks of Chemistry
Elements
Compounds
Atoms
What all matter is made of
2 or more elements connected together
Ex: water, glucose, salt
Different types of atoms
Ex: oxygen, carbon, hydrogen

7. CELL COMPOUNDS ATOMS (elements) Atoms= small Compounds= bigger
Cell= biggest
COMPOUNDS
Protein
ATOMS (elements)

8. The body is made of about 25 elements
Oxygen, Carbon,
Hydrogen, & Nitrogen
make up about 96% of the
living matter in your body
where do our atoms come from?

9. Important Element Symbols:
H (Hydrogen)
N (Nitrogen)
O (Oxygen)
C (Carbon)
Each element is represented by a symbol made up
of one or two letters.

10. How do we write chemical compounds using symbols?
We list the elements in the compound, and how many atoms there are of each element
This chemical formula is like a recipe
H20 : ____________ CO2 : _________________
How many hydrogen atoms in 1 molecule of water? 2 1
How many oxygen atoms in 1 molecule of water?

11. What makes a compound organic?
Organic compound: They contain both carbon (C) and hydrogen (H) atoms.

12. What inorganic compounds are important to living things?
Water
Carbon dioxide
What organic compounds are important to living things?
Carbohydrates
Proteins
Lipids
Nucleic acids (DNA)

13. Large organic compounds are built from smaller building blocks
Carbohydrates
(Ex: Starch)
Proteins
Fats (lipids)
Nucleic Acids
Simple Sugars
(Ex: Starch)
Amino Acids
Fatty Acids
&
Glycerol
Nucleotides

14. Why do we have to digest these nutrients?
SIMPLE SUGARS
STARCH
Large compounds can’t get into the cell!!

15. Carbohydrates get digested into simple sugars

16. Fats get digested into fatty acids & glycerol+
Digestion +
What is Fat? 16 16

17. Proteins get digested into amino acids

18. Enzymes are proteins Enzymes are called “catalysts.”
They speed up digestion reactions
Enzyme
Enzyme
Enzyme 18 18

19. Enzymes are proteins They also speed up synthesis reactions
Starch
Simple sugars
Review: Digestion =
Synthesis = 19 19

20. Enzymes are picky!
Temperature and pH (acidity) can make an enzyme break! 
I’m melting!
Broken enzyme - doesn’t work!
Enzyme 20 20

21. Tying it all Together: Why do we need organic molecules?
Science of macaroni salad

22. Our brains like sugar…. https://www.youtube.com/watch?v=lEXBxijQREo
What is better: fresh or frozen food?