DNA Replication

During replication, which sequence of nucleotides would form hydrogen bonds with the DNA sequence TATGA?

• TATGA

• AUACU

• ATACT

• CACTA

The weakness of hydrogen bonds between the bases of DNA allows

• conversion of bases to amino acids in the ence of cell starvation

• base pairs to separate during transcription and replication

• new bases to be incorporated into the DNA molecule

• rearrangement of the sequence of bases to take place

The role of DNA Polymerase in the replication process is to

• Unzip the strand of RNA and proofread the bases for correct sequencing.

• Unzip the strand of DNA and join new nucleotides to the old strand

• Join the sugar to the phosphate and proofreads the bases to see they are sequenced correctly.

• Join nucleotides into the DNA polymer and proofreads to make sure the correct nucleotides are sequenced.

Many enzymes work together to help replicate the DNA in a cell to prepare for cell division. An enzyme called helicase is tasked to

• Break the hydrogen bonds between the nitrogen bases

• Break the covalent bonds between the nitrogen bases

• Join the hydrogen bonds between the bases

• Join the nucleotides together and proofread

A scientist uses radioactive nitrogen to label the nitrogenous bases of the DNA of a cell. Then the DNA is allowed to replicate, and the new strands take up non-radioactive bases. What would the daughters cells have?

• Both will have radioactive DNA

• Neither will have radioactive DNA

• One will have radioactive and the other will not

• Both will have radioactive RNA