Unit 3 Review

What is replication?

• making a copy of DNA

• making RNA from DNA

• tRNA transferring amino acids

• DNA leaving the nucleus

Double helix with sugar-phosphate backbones and bases ATCG

• RNA

• tRNA

• DNA

• mRNA

RNA is single stranded with sugar-phosphate backbone and bases AUGC.

• True

• False

What is the sugar for DNA?

• Ribose

• Glucose

• Sucrose

• Deoxyribose

Ribose is the sugar in mRNA and tRNA.

• True

• False

Which RNA is transported from the nucleus to the ribosome?

• tRNA

• RNA

• mRNA

• DNA

Which RNA is only found in the cytoplasm and carries amino acids to the ribosome?

• tRNA

• RNA

• mRNA

• DNA

During DNA Replication the bases are A=U and C=G.

• True

• False

What bond holds together bases in DNA?

• peptide bond

• polypeptide

• carbon bond

• weak hydrogen bond

What is the importance of the weak hydrogen bond holding the bases together?

• makes splitting DNA impossible

• only allow Uracil to be substituted

• easy to break apart for replication

• use more energy to hold bases together