Science B3 - DNA, Proteins and Mutations

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Where is the code thats needed to produce a protein carried from?
from the DNA to the ribosomes by a molecule called mRNA.
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Proteins are coded for by DNA
The base sequence codes for the order of amino acids. Each amino acid is coded for by three bases.
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What are CHROMOSOMES?
long,coiled molecules of DNA, divided up into regions called genes.
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What are PROTEINS?
made up of long chains of amino acids. They can be structural, hormones, carrier molecules or enzymes.
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Mutations may lead to the production of different proteins. WHY?
Due to a change in bases in DNA can change the amino acid sequence.
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Enzyme activity is affected by pH and temperature. This is due to:
Lower collision rates at lower temperatures. Denaturing at extremes of pH and high temperatures.
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Where does PROTEIN SYNTHESIS occur?
On ribosomes in the cytoplasm.
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What are ENZYMES?
specific and work by a lock and key mechanism.
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Other cards in this set

Card 2

Front

The base sequence codes for the order of amino acids. Each amino acid is coded for by three bases.

Back

Proteins are coded for by DNA

Card 3

Front

long,coiled molecules of DNA, divided up into regions called genes.

Back

Preview of the back of card 3

Card 4

Front

made up of long chains of amino acids. They can be structural, hormones, carrier molecules or enzymes.

Back

Preview of the back of card 4

Card 5

Front

Due to a change in bases in DNA can change the amino acid sequence.

Back

Preview of the back of card 5
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