DNArandpbiology.weebly.com/uploads/2/2/3/1/22310962/dna...1. What are the 4 bases of DNA? 2....
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DNA Blueprint for Life!
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TEK 6A, 6B and 6H • Identify components of DNA
• Describe how information for
specifying traits of an organism
is carried in the DNA
• Recognize that components
that make up the genetic
code are common to all
organisms
• Describe how DNA
fingerprinting is used to study
the genome of organisms
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• DNA =Deoxyribonucleic Acid
• DNA is made of nucleotides (PBS)
–P- phosphate group
–B- nitrogenous bases (A, T, C, G)
–S- sugar (deoxyribose)
• The structure of DNA is a double helix
DNA Basics
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What is in a nucleotide?
PBS!
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Bases of DNA
(2 Rings)
(1 Ring)
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Who figured out what DNA looks like?
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What holds the bases together?
hydrogen bonds
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Remember “The apple goes on the
tree and the car goes in the garage”
to help you remember A pairs with T
and G pairs with C.
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What does a double helix look like? A twisted ladder!
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If we all have DNA, why don’t we all look the same?
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Where is your DNA found?
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1. What are the 4 bases of DNA?
2. Describe the structure of a DNA molecule.
3. What type of ‘bonds’ hold the bases together?
4. What bonds with adenine?
5. What bonds with cytosine?
Are you a DNA expert?
A, T, C, and G
Double helix
Hydrogen bonds
Thymine
Guanine
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Which of the following statements best describes a DNA molecule?
A. It is a double helix.
B. It contains the sugar ribose.
C. It is composed of amino acids.
D. It contains the nitrogenous base
uracil.
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Scientists can use genetic information to identify people because it is unique to
each person. Which specific characteristic is unique to an individual?
A The shape of the DNA molecules in cells
B The number of chromosomes in each cell
C The sequence of DNA nucleotides in cells
D The size of each chromosome in a cell
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DNA Blueprint for Life!
Using what you have learned,
write to explain the cartoon
strip below.