Topic 6 The Structures Of DNA And Protien Synthesus Flashcards
What is DNA made up of
Strands of polymers made up of repeating units called nucleotides
What does each nucleotide consist of
A sugar
phosphate group
a base
What are the backbones of a DNA strand
Phosphate and sugar
What bases attached to each other In complementary base pairing
A + t
C + G
What does the order of the bases in a gene determine
The order of amino acids in a protein
What is each amino acid code for
By a sequence of three bases
What do parts of DNA that don’t code for proteins do
Control whether or not a gene is expressed
How are the protein made
MRNA copy the code for DNA and act as messenger between DNA and the ribosome
it carries the code between them
correct amino acids are brought to the ribosomes in the correct order by carrier molecules
What are three different kinds of proteins
Enzymes
hormones
structural proteins
What are enzymes
Biological catalyst speed up a chemical reaction in the body
What are hormones
Used to carry messages around the body
released from a gland into the blood
What are structural proteins
Physically strong proteins
