Try this … What do a person, a tree, a monkey, a flower, an ant, a lizard, a snake, a dinosaur, a...
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Transcript of Try this … What do a person, a tree, a monkey, a flower, an ant, a lizard, a snake, a dinosaur, a...
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