Prtosynwksht

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Biology-Mr.Willets
Protein Synthesis

1) The order of bases along one side of a DNA molecule is as follows:

A G C T A A G G C A T G C A T
____________________________

The line under the letters represents alternating molecules of _________________ and _____________

The bases are attached to the _________________ molecules along the sides.

a) What would the order of bases be on the other side of the DNA molecule?

_______________________________________________________________________

We often only show one side of a piece of DNA because the ________________________ (2 words) is found only on one side.

b) Using the original side given above, what would be the order of bases along the piece of mRNA formed from this DNA?

___________________________________________________________________________

This version of the genetic code is ___________________________ to the original version on the DNA

(which means it is opposite but fits together)

Because this is RNA, it uses the base ______ instead of ________ The process that makes mRNA is called ________________________________. This process occurs in the ________________ of the cell since that's where the _________ is.

c) Use Table One to find the order of amino acids that would be put together using this mRNA (from part b)

List the amino acids in order.

__________________________________________________________________

The process that puts the amino acids together is called ______________________ This process occurs at what cell structure? ______________________

2) The following polypeptide chain has been put together:

leucine - alanine - glycine - tryptophan - tyrosine - valine

a) Use Table Two to find the order of bases on the mRNA that was used to make this chain?

_________________________________________________________

b) Write down the order of bases on the side of the DNA section that had the code for making this chain.

_________________________________________________________________________

3) There are four tRNA molecules that could carry the amino acid valine- Use Table One to find the 4 codons

and then figure what the anti-codons are for each one. Write the anti-codons below.

__________ ____________ ___________ ________________

What word describes how anti-codons compare to the codons for the amino acids? ____________________

TABLE ONE - mRNA CODONS

SECOND BASE IN CODON

First Base in Codon	U	C	A	G
U	Phenyalanine Phenylalanine Leucine Leucine	Serine Serine Serine Serine	Trosine Tyronine Stop Codon Stop Codon	Cysteine Cysteine Stop Codon Tryptophan	U C A G	Third
C	Leucine Leucine Leucine Leucine	Proline Proline Proline Proline	Histidine Histidine Glutamine Glutamine	Arginine Arginine Arginine Arginine	U C A G	Base
A	Isoleucine Isoleucine Isoleucine Methionine(start)	Threonine Threonine Threonine Threonine	Apsaragine Asparagine Lysine Lysine	Serine Serine Arginine Arginine	U C A G	In
G	Valine Valeine Valine Valine	Alanine Alanine Alanine Alanine	Aspartic Acid Aspartic Acid Glutamic Acid Glutamic Acid	Glycine Glycine Glycine Glycine	U C A G	Codon

TABLE TWO - mRNA CODONS

alanine....................GCA

glutamic acid.............GAA

leucine......................CUC

serine .................UCA

arginine..................CGA

glutamine..................CAA

lysine........................AAA

threonine.............ACA

asparagine..............AAC

glycine......................GGC

methionine................AUG

tryptophan..........UGG

aspartic acid...........GAC

histidine....................CAC

phenylalanine............UUU

tyrosine...............UAU

cysteine.................UGC

isoleucine.................AUC

proline.......................CCA

valine...................GUA

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alanine....................GCA	glutamic acid.............GAA	leucine......................CUC	serine .................UCA
arginine..................CGA	glutamine..................CAA	lysine........................AAA	threonine.............ACA
asparagine..............AAC	glycine......................GGC	methionine................AUG	tryptophan..........UGG
aspartic acid...........GAC	histidine....................CAC	phenylalanine............UUU	tyrosine...............UAU
cysteine.................UGC	isoleucine.................AUC	proline.......................CCA	valine...................GUA