BIOLOGY 5: DNA - Making Proteins

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How many strands does a DNA molecule have?
2
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What shape is DNA?
A double helix (two spirals)
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What are strands made up of?
Nucleotides
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What are nucleotides made up of?
Bases
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How many bases does DNA have?
4
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What are the 4 different bases that DNA has?
adenine (A), cytosine (C), guanine (G), thymine (T)
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Which bases always pair up?
A-T, C-G
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What are the two strands held together by?
Bases
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What is a gene?
A section of DNA that contains instructions for one particular protein
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How do cells make proteins?
By joining amino acids in a particular order
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What tells cells which order to put amino acids together in?
The order of the bases in a gene
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What is a set of 3 bases called?
A triplet
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What is each set of three bases a code for?
One amino acid
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What makes proteins?
Organelles called ribosomes
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Where are proteins made?
In the cell cytoplasm
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How does information from the DNA get to the ribosome?
A copy of the DNA is made using messenger RNA
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How is the ribosome and messenger RNA used to make proteins?
1) The two strands unzip and messenger RNA is made using a strand of DNA as a template. 2)The messenger RNA moves out of the nucleus and joins with a ribosome in the cytoplasm 3)The ribosome joins amino acids together in a chain to make proteins
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Other cards in this set

Card 2

Front

What shape is DNA?

Back

A double helix (two spirals)

Card 3

Front

What are strands made up of?

Back

Preview of the front of card 3

Card 4

Front

What are nucleotides made up of?

Back

Preview of the front of card 4

Card 5

Front

How many bases does DNA have?

Back

Preview of the front of card 5
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