PROTEIN SYNTHESIS WEBQUEST

OBJECTIVE

The purpose of this assignment is to give you a better understanding of how the messagefound on a molecule of DNA is  used to build a protein.

TASK 1 : DNA AND RNA COMPARISON

1. Describe the differences between the DNA and RNA structure

2. Identify the function of the three types of RNA molecules.

a.Ribsosomal RNA(rRNA)

b.Messenger RNA(mRNA)

c.Transfer RNA(tRNA)

TASK 2 :  PROTEIN SYNTHESIS OVERVIEW

1. Define Protein Synthesis

2. Segments of DNA which code for proteins are known as __________________________.

a.How does this describe how to make proteins?

3. RNA is read one codon at a time. A codon consists of ________nitrogen bases.

4. What brings (or transfers) the proper amino acid to the ribosome?

5. Amino acids are joined together by ___________________________ bonds, which explains why proteins are also sometimes known as ___________________________________ chains.

6. What ultimately determines the function of a protein?

TASK 3 : TRANSCRIPTION AND TRANSLATION PRACTICE

1. Practice transcription by building a molecule of RNA by using DNA as a “template.”  Give the complementary sequence below.

DNA Sequence:      T      A      C           C      C       G            A      G      G   

RNA Sequence:

2. Match the complementary anticodons on the tRNA molecules. Identify the coded amino acids below.

a. mRNA codon:   A U G

i. What is the complementary tRNA anticodon?

ii. This codon signals for which amino acid ?

b. mRNA codon:  G  G  C

i. What is the complementary tRNA anticodon?

ii. This codon signals for which amino acid?

c. mRNA codon:  U  C  C

i. What is the complementary tRNA anticodon?

ii. This codon signals for which amino acid?

3. How do you know when the protein being built is complete?

4. Draw the diagram which illustrates the entire process (DNA -RNA- Protein). Label all major parts.

5. Build the protein using the given DNA sequence. What is the final amino acid sequence?______________________________________________________________________________

• Answer the questions using no more than 5 lines
•  List steps of the protein synthesis
  
• Use scientific language
• Draw the diagram which illustrates the entire process (DNA -RNA- Protein). Label all major parts.
• Build the protein using the given DNA sequence. What is the final amino acid sequence?

You are assessed in use of scientific language, amount of information and paragraph construction

You will be using the protein synthesis in your cells, all through your life. It is important you understand how it works. Have fun working on this project!