Genetics Re-cap

 What is the function (Job )of mRNA? 

•  It carries amino acids to the growing protein.

• It makes up the ribosomes and provides the site for protein synthesis.

• It is transcribed from the DNA and carries the information to the ribosome.

 If a nucleic acid contains the bases AUU GCA UCG, it would most likely be?

• Messenger RNA

• DNA

A gene is:

• A segment (piece) of DNA that codes for a specific protein.

• An RNA sequence that carries information to produce codons and anticodons.

• a DNA nucleotide sequence that carries information to produce an amino acid.

Given the DNA sequence CAC-GTA-TGC-AAA-ATT, use the table above to describe the order of the amino acids.

• Valine – Proline -- Threonine--Leucine and is incomplete.

• Valine - Histidine – Threonine -- Phenylalanine and is complete.

• Histidine -Valine – Alanine – Lysine -- Isoleucine and is complete

What is the form ( shape) of mRNA ?

• Double Helix

• Single Strand

• Double strand

Name the process that makes mRNA

• transcription

• translation

• replication

A group of 3 bases is called a ?

• nucleotide

• anti-codon

• codon

A mutation occurs in a gene that changes one mRNA codon from UCC to UCG.  No other codons were affected by the mutation.  Which of the following statements is true? (Use the codon chart)

• This is a point mutation and there will be no effect on the final protein structure 

• This is a point mutation and the final protein structure will be affected

• This is a frameshift mutation and the final protein structure will be affected

A mutation that involves the insertion or deletion of one nucleotide is called a(an)

• frameshift mutation

• substitution.

Genetic changes can occur as a result of exposure to chemicals and radiation, and exposures in the womb or early childhood may affect health later in life. This is due to:

• changes to production of proteins.

• genes turned on or off.

• Both answers