DNA and Protien

What is a Gene?

A section of DNA which codes for a protein.

What are proteins made up of?

Chains of amino acids joined up together.

How many DNA bases are there?

4

What is a double stranded helix held together by?

Complementary bases pairs. (A+T & C+G)

How many amino acids are there?

20

What does mRNA do?

Copies the code in the nucleus and takes it to the ribosome.

mRNA is a ? stranded molecule

Single.

What does the order of amino acids determine?

What protein is made.

What happens at the Ribosome?

The order of bases is read and this codes for a sequence of amino acids.

How many groups of bases form a ‘word’?

3

What does a ‘word’ specify?

Which amino acid goes into the protein.

Where is DNA found?

In the nucleus.

DNA is coiled up until a ? is formed

Chromosome

What does DNA control?

Our characteristics

What does DNA contain?

The instructions for our cells to work properly.

What’s one example of a special function that proteins enable the cell to preform?

A heart cell beating.

What does DNA do in the nucleus?

Unwinds

What does mRNA pass through?

The nucleus wall, the cytoplasm to get to the ribosome

Proteins are large organic molecules made up of what elements?

C, H, O, N

What links amino acids together into long chains?

Peptide bonds

What do amino acids do to give the protein a specific shape?

Fold up

What is the shape of a protein determined by?

The order of amino acids

What are the functions of proteins?

Structural, Hormones, Antibodies, Receptors, Enzymes

Some amino acids are attracted to each other so what do they try to do?

Stick together