Unit 7

UNIT 7: PROTEIN SYNTHESIS

IN THIS UNIT WE WILL EXAMINE HOW PROTEINS CAN BE MADE. WE WILL STUDY HOW DNA'S INSTRUCTIONS FOR BUILDING PROTEINS LEAVES THE NUCLEUS AND TRAVELS INTO THE CYTOPLASM TO THE RIBOSOME, WHERE THE INSTRUCTIONS ARE TRANSLATED INTO PROTEINS. THIS SHOULD BE THE LAST SECTION OF REALLY DETAILED PROCESSES THAT WILL BE EXAMINED.

North Carolina Standard Course of Study

Bio.3.1 Explain how traits are determined by the structure and function of DNA.

Bio.3.1.2 Explain how DNA and RNA code for proteins and determine traits.

• Explain the process of protein synthesis:

 Transcription that produces an RNA copy of DNA, which is further modified into the three types of RNA

 mRNA traveling to the ribosome (rRNA)

 Translation – tRNA supplies appropriate amino acids

 Amino acids are linked by peptide bonds to form polypeptides. Polypeptide chains form protein molecules. Proteins can be structural (forming a part of the cell materials) or functional (hormones, enzymes, or chemicals involved in cell chemistry).

• Interpret a codon chart to determine the amino acid sequence produced by a particular sequence of bases.

• Explain how an amino acid sequence forms a protein that leads to a particular function and phenotype (trait) in an organism

Bio.3.1.3 Explain how mutations in DNA that result from interactions with the environment (i.e. radiation and chemicals) or new combinations in existing genes lead to changes in function and phenotype.

• Understand that mutations are changes in DNA coding and can be deletions, additions, or substitutions. Mutations can be random and spontaneous or caused by radiation and/or chemical exposure.

• Develop a cause and effect model in order to describe how mutations: changing amino acid sequence, protein function, phenotype. Only mutations in sex cells (egg and sperm) or in the gamete produced from the primary sex cells can result in heritable changes.

Monday, April 9 - DNA Structure and Replication

Ricochet Science Nucleic Acids Video

Wednesday, April 11 - Transcription/Translation Quiz, Protein Synthesis Practice and Reinforcement

Christmas Elf Activity

A Protein Fairy Tale Analogy

Thursday, April 12 - DNA Mutations

Amoeba Sisters Mutation Video

Mutations Only ppt.ppt

Friday, April 13 - Review Transcription to Translation, Snork Activity

Study Guide for Protein Synthesis

Monday, April 16 - Protein Synthesis Test!

Image of blue eyes taken from: http://omgfacts.com/your-blue-eyes-arent-actually-blue/