1. I want my class to know… I’m learning (just like you!)
I make mistakes (just like you!)
I’m here to help you
I genuinely care about your personal growth and academic success

2. Getting to know Ms. Muirhead: Two Truths and a Lie

3. a) My favourite colour is purple b) I own a motorcycle c) I like to knit

4. a) My favourite colour is purple b) I own a motorcycle c) I like to knit

5. a) Skiing is one of my favourite hobbies b) I am an only child c) I am not from the lower mainland

6. a) Skiing is one of my favourite hobbies b) I am an only child c) I am not from the lower mainland

7. a) Both my parents are teachers b) I share my name with a Disney princess c) I am 28 years old

8. a) Both my parents are teachers b) I share my name with a Disney princess c) I am 28 years old

9. DNA
The illustration is a ‘model’ of the double helix forming part of a DNA molecule
(Slide 14)

10. What is DNA? Where is DNA found?

11. DNA stands for deoxyribonucleic acid
This large molecule is present in the nucleus
of all cells in all living organisms
DNA controls:
All the chemical changes which take place in cells
The kind of cell which is formed
The kind of organisms which is produced

12. DNA is a very large molecule made up of a long
chain of sub-units
The sub-units are called nucleotides
Each nucleotide is made up of:
A deoxyribose sugar
A phosphate group
A nitrogenous base

13. There are 4 types of bases:
Adenine (A)
Guanine (G)
Cytosine (C)
Thymine (T)

14. combine to form a nucleotide
The deoxyribose,
the phosphate,
and one of the bases
combine to form a nucleotide
phosphate
base
deoxyribose sugar
PO4
It is the phosphate group which gives DNA its acidic properties

15. (Literally. There are 6 billion bases in the human genome.)
A molecule of DNA is formed by millions of nucleotides joined together in a long chain.
(Literally. There are 6 billion bases in the human genome.)
PO4
sugar-phosphate
backbone
+ bases

16. DNA consists of a double strand of nucleotides
The sugar-phosphate backbones are on the outside
and the strands are held together by hydrogen
bonds between the bases
The two strands together twist to form a double helix

17. PO4
PO4
PO4
PO4
PO4
PO4
PO4
PO4
PO4

18. The bases always pair up in the same way
Adenine forms a bond with Thymine
Adenine
Thymine
and Cytosine bonds with Guanine
Cytosine
Guanine
This is called complementary based pairing

19. PO4
adenine
cytosine
PO4
thymine
PO4
guanine
PO4
PO4

20. 14
THE DOUBLE HELIX
bases
sugar-phosphate
chain

21. Video: DNA Structure

22. Check-In Which is not a component of DNA? A nitrogenous base
An organic acid
A phosphate
A sugar molecule

23. What is a sub-unit of DNA called?
Adenine
Double helix
Deoxyribose
Nucleotide

24. What are the correct pairings for nucleotides?
Adenine-Guanine/Cytosine-Thymine
Thymine-Guanine/Adenine-Cytosine
Cytosine-Guanine/Adenine-Thymine
Thymine-Thymine/Guanine-Guanine/Adenine-Adenine/Cytosine-Cytosine

25. Which of these statements is true?
Complementary base pairs are held together with hydrogen bonds
The sugar phosphate backbone is in the middle of a molecule of DNA
Three DNA strands make up a helix

26. DNA contains thousands of genes
Gene: a sequence of DNA that provides instructions to make a protein
Humans have ~23,000 genes
These proteins contribute to our chemical and physical traits (trait: characteristic)

27. DNA and Heredity
We get half of our DNA from our mother and half of our DNA from our father
(How do we get this DNA?)
This new combination of genetic material makes us the unique individual we are!

28. DNA’s Role in Evolution
DNA is the only thing that is passed from one generation to another
Traits that are passed from one generation to another are called heritable traits
The process of evolution is able to act on these heritable traits

29. Video: DNA and Heredity

30. We’re all a little bit closer than you think