DNA Biology Re-Teach

DNA

The Blueprint of Life"

• DeoxyriboNucleic Acid

• established by James Watson and Francis Crick

• •Shape of a double helix

Genes

• •codes for your genes (traits)

• •made of repeating subunits called nucleotides

Base-Pair Rule

• Adenine <==> Thymine

• Guanine <==> Cytosine

• The sides of the DNA ladder are phosphate & sugar

• held together by hydrogen bonds

Multiple Choice

Why is DNA important?

• it is very small and very complicated
• it's in everything
• it serves as the blueprint for traits of all living things
• because we eat it every day for energy

Multiple Choice

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

Multiple Choice

Adenine bonds with ______________.

• Guanine
• Thymine
• Cytosine
• Adenine

Multiple Choice

What are the nucleotides made of?

• Sugar, Phosphate, nitrogen base
• Phosphate, Adenine, nitrogen base
• Thymine, Adenine, Cytomine
• Phosphate, Nitrogen, Adenine

How the Code Works

• The combination of A,T,G,C determines what traits you might have, for ex.

• C A T C A T  = purple hair

• T A C T A C = yellow hair

Multiple Choice

What determines the code, or information, of a DNA molecule?

• the shape (structure) of the nitrogen bases
• the order (sequence) of the nitrogen bases
• the color of the nitrogen bases
• the frequency (number) of nitrogen bases

Multiple Choice

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

Multiple Choice

Which organelle is DNA usually found in?

• cell membrane
• vacuole
• ribosome
• nucleus

Multiple Choice

DNA is a polymer made of:

• Nucleotides
• Ribosomes
• Purines
• Pyrimidines

Multiple Choice

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

Multiple Choice

What does DNA stand for?

• Deoxyribonucleic acid
• Denitrogenous acid
• Deribonucleic acid
• Diribonucleic acid