DNA Review

A point mutation is caused by an insertion or a deletion.

• True

• False

The only difference between tRNA & DNA is that uracil replaces thymine.

• True

• False

Molecules of DNA are composed of long chains of

• Amino Acids

• Monosaccharids

• Fatty Acids

• Nucleotides

Of the 4 base pairs, which 2 are purines & which 2 are pyrimidines?

• Purines: A&T Pyrimidines: U&C

• Purines: A&T Pyrimidines: C&G

• Purines: A&G Pyrimidines: T&C

• Purines: U&T Pyrimidines: G&C

The enzyme that unwinds DNA during replication is

• Double Helix

• DNA Helicase

• Forks

• Phages

RNA differs from DNA in that RNA

• is double stranded

• contains the base uracil

• contains deoxyribose

• does not contain adenine

During transcription

• proteins are made

• DNA is replicated

• RNA is produced

• DNA is destroyed

Each nucleotide triplet in mRNA that specifies a particular amino acid is called

• Peptide Bond

• Anticodon

• Codon

• Helicase

A mutation caused by DNA breaking away from a chromosome and reattaching to a different one is called

• Deletion

• Inversion

• Duplication

• Translocation

Which part of DNA contains the genetic infromation?

• Sugar Molecules

• Nitrogen Base Pairs

• Phosphate Molecules

• Deoxyribose Molecules