Try this…What do a person, a tree , a monkey , a flower, an ant , a lizard, a snake, a dinosaur, a shark , a frog, a dog , a

cat, a bamboo, a snail , a crocodile , a lion, a bear, an amoeba , an algae a fish, bacteria, mushroom and a beetle

have in common?

That's right !They're That's right !They're all made of trillions all made of trillions tiny … tiny …

C E L L S

But if all living things are But if all living things are made of cells, what makes made of cells, what makes

each one unique? each one unique?

Each living thing is UNIQUE Each living thing is UNIQUE because of the DNAbecause of the DNA but what is but what is

DDNNAA??

DNA

The Blue Print Of Life

OBJECTIVES:1. describe the composition ans

structure of the DNA molecule2. make a simple model of the DNA

molecule 3. explain the nitrogen base pairing in DNA

Activity : Making A DNA ModelActivity : Making A DNA Model

Pair WorkPair Work Given the following materials, Make a simple DNA Given the following materials, Make a simple DNA

model. model.

Materials: Materials: construction paper cut outs construction paper cut outs ScissorsScissors Scotch tapeScotch tape Hard plastic strips (to be provided by the teacher)Hard plastic strips (to be provided by the teacher)

Pair the base cut outs and attach these in Pair the base cut outs and attach these in between the two plastic strips. You will be given between the two plastic strips. You will be given 2 minutes for this.2 minutes for this.

Guide Questions for the Guide Questions for the DNA Model ActivityDNA Model Activity::

Describe the model you have made.Describe the model you have made. How are the base pairs arranged?How are the base pairs arranged? How did you know which one should be How did you know which one should be

paired with the other? paired with the other? What does the plastic strips represent?What does the plastic strips represent? If we move the DNA model sideways If we move the DNA model sideways

how does it look like?how does it look like?

The Timer Starts Now…The Timer Starts Now…

http://www.youtube.com/watch?http://www.youtube.com/watch?v=c1kTgHJ_RHo&feature=relatedv=c1kTgHJ_RHo&feature=related

Video ClipVideo Clip

http://www.youtube.com/watch?http://www.youtube.com/watch?v=O0--nyv6O58&feature=relatedv=O0--nyv6O58&feature=related

Guide Questions :•What are the features of the DNA?

•What links the two strands of DNA together?

•What are the specific base pairs?

• What does the DNA stores?

Deoxyribonucleic AcidDeoxyribonucleic Acid

• Is a nucleic acid found inside the chromosomes.

• It is made up of two strands

( double helix )

• Basic unit: nucleotides made up of :

1. Deoxyribose sugar

2. Phosphate group

3. Base

NUCLEOTIDENUCLEOTIDE

Deoxyribose Sugar

Hydrogen bondHydrogen bond

To Sum Up…To Sum Up…

“I am fearfully and wonderfully made .”

How can we How can we make proteins make proteins

out of the out of the DNA strand , DNA strand ,

Francis ?Francis ?

We’ ll find that out

tomorrow,

James

Flow ChartFlow Chart

Introduction• Recapitulation of the LessonUsing questions and diagrams

Lesson Development• Making a simple DNA model which uses as a spring board to

the lesson• Video Clip to be used for the explanation of the topic on DNA

• Inquiry – based discussion

Closure •Summarization of the lesson using an outline diagram

•Preview of the next lesson on Protein Synthesis