Biology 12.3: DNA, RNA, and Protein

Front

What is the role of RNA polymerase in protein synthesis?

Back

RNA polymerase is the enzyme responsible for synthesizing mRNA from a DNA template during the process of transcription.

Front

What type of RNA forms the ribosome in the cytoplasm?

Back

Ribosomal RNA (rRNA) associates with proteins to form ribosomes, which are essential for protein synthesis.

Front

What is messenger RNA (mRNA)?

Back

Messenger RNA (mRNA) is a long strand of RNA nucleotides formed complementary to one strand of DNA; it carries the genetic information from the nucleus to the ribosome for protein synthesis.

Front

What is transcription?

Back

Transcription is the process of copying a segment of DNA into a molecule of mRNA.

Front

Where does translation occur in the cell?

Back

Translation takes place in the cytoplasm, where ribosomes synthesize proteins based on the information carried by mRNA.

Front

What is the function of transfer RNA (tRNA)?

Back

Transfer RNA (tRNA) transports specific amino acids to the ribosome during protein synthesis, matching them to the corresponding codons on the mRNA.

Front

Define the term 'codon'.

Back

A codon is a sequence of three nucleotides in mRNA that specifies a particular amino acid or signals the termination of protein synthesis.

Front

What is the significance of the genetic code?

Back

The genetic code is a set of rules that defines how the sequence of nucleotides in DNA and RNA is translated into the amino acid sequence of proteins.

Front

What is the difference between DNA and RNA?

Back

DNA is double-stranded and contains the sugar deoxyribose, while RNA is single-stranded and contains the sugar ribose.

Front

What is the role of helicase in DNA replication?

Back

Helicase is the enzyme that unwinds and separates the two strands of DNA during replication.