Biology Quiz

What is the first step of DNA replication, and where does it occur in the cell?

• DNA unwinds in the nucleus

• RNA polymerase binds to DNA in the cytoplasm

• DNA polymerase adds nucleotides in the ribosome

• mRNA is synthesized in the endoplasmic reticulum

During DNA replication, what enzyme is responsible for adding nucleotides to the new DNA strand?

• Helicase

• DNA polymerase

• Ligase

• RNA polymerase

What are the components of a nucleotide?

• Pentose Sugar

• Phosphate Group

• Fatty Acids

• Nitrogenous base

What is the main difference between DNA and RNA?

• DNA is double-stranded while RNA is single-stranded

• DNA is found only in the cytoplasm while RNA is only in the nucleus

• DNA is made of amino acids while RNA is made of nucleotides

• DNA can leave the nucleus while RNA cannot

Where in the cell does transcription occur?

• In the ribosome

• In the nucleus

• In the mitochondria

• In the endoplasmic reticulum

What is the role of RNA polymerase during transcription?

• It adds amino acids to the growing polypeptide chain

• It replicates the DNA molecule

• It synthesizes mRNA from a DNA template

• It transports mRNA out of the nucleus

During translation, what is the first structure that is assembled?

• A polypeptide chain

• A ribosome

• An mRNA molecule

• A tRNA molecule

Where in the cell does translation occur?

• In the nucleus

• In the mitochondria

• In the ribosome

• In the Golgi apparatus

What molecule carries the genetic code from the nucleus to the ribosomes in the cytoplasm for protein synthesis?

• DNA

• mRNA

• tRNA

• rRNA

Which sugar is present in the mRNA molecule?

• Deoxyribose

• Glucose

• Ribose

• Fructose