Protein synthesis

The process of copying the DNA code into mRNA is called:

• Translation

• Transformation

• Transcription

• Translocation

Transcription occurs in the nucleus. Why must the DNA code be copied into mRNA?

• Because mRNA is too large to leave the nucleus

• Because DNA is too large to leave the nucleus

• Because the DNA code is incorrect

• Because the DNA code is too long

During transcription, which enzyme joins the RNA nucleotides together?

• DNA polymerase

• RNA polymerase

• DNA helicase

• Pepsin

A DNA base sequence ACCTG produces which mRNA strand?

• TGGAC

• UGGAC

• UCCAC

• TGGUC

What must be removed from the primary mRNA transcript before it is ready to leave the nucleus?

• Introns

• Exons

Three bases code for one amino acid. What name is given to three RNA bases that code for one amino acid?

• Triplet

• Codon

• Anti-codon

• Code

One feature of the genetic code is that it is 'degenerate'. What does this mean?

• Some codons do not code for an amino acid

• All organisms use the same genetic code

• Each base takes part in only one codon

• Different codons can code for the same amino acid

Where in the cell does 'translation' take place?

• Cytoplasm

• Golgi body

• Ribosome

• Rough endoplasmic reticulum

A tRNA molecule carries a specfic amino acid to the mRNA at the ribosome. What are the three bases at the bottom of the tRNA called?

• Codon

• Triplet

• Anti-codon

• Anti-code

Which codon would this anticodon, UAC, pair up with?

• TTG

• AUG

• AUC

• ATG