Unit 4 (DNA + RNA) Review Quizizz

During which part of the cell cycle does DNA replication occur?

• G2 phase

• G1 phase

• S phase

• Prophase

Which event first takes place during DNA replication?

• A single-stranded DNA molecule serves as a template.

• Free nucleotides are bonded together in the correct sequence.

• Hydrogen bonds break and a double-stranded DNA molecule separates.

• Hydrogen bonds break and a double-stranded RNA molecule separates.

Which protein is responsible for breaking apart the hydrogen bonds between base pairs in dsDNA

• Helicase

• Protease

• RNA Polymerase

• DNA Polymerase

This model states the two original DNA strands separate and are used as template strands to create newly synthesized DNA strands that are a 50/50 mix of new and old DNA, which model is this describing?

• The Conservative model.

• The Dispersive Model

• The Semi-Dispersive Model

• The semi-conservative Model

In order for protein synthesis to occur, both transcription and translation must occur. Which of the following statements describes the difference between transcription and translation?

• In transcription, the genetic code of a DNA molecule is encoded. Translation is the process of converting the DNA code into a code that RNA can use.

• In transcription, an amino acid chain is encoded in a DNA molecule. Translation is the process of turning the amino acids into nucleic acids in an RNA molecule.

• In transcription, a double helix DNA molecule is split into two separate single strands. Translation is the process of joining each single DNA strand with a single strand of matching RNA.

• In transcription, the genetic code of a DNA molecule is transferred to a messenger RNA molecule. Translation is the process of creating an amino acid chain using the encoded messenger RNA.

Which type of biological molecule is being made during this process?

• tRNA

• mRNA

• protein

• phospholipid

If structure X did not function correctly, which of the following would occur first?

• the mRNA would not leave the nucleus.

• the amino acid chain would not be completed.

• the cell would not be able to move proteins through the cell membrane.

• the protein would be mutated, and the ribosome would stop functioning.

What is the structure in the previous picture marked by X?

• rRNA

• mRNA

• tRNA

• dsDNA

If a mutation occurs in an mRNA codon that was originally ACA, which mutated mRNA codon would result in an amino acid sequence different from that produced by the ACA codon?

• ACC

• AUG

• ACU

• ACG

Which protein is responsible for replicating the DNA strand during S phase?

• DNA Polymerase

• RNA Polymerase

• Nuclease

• Primase