Transcription and Translation

Front

What is the role of tRNA in protein synthesis?

Back

tRNA (transfer RNA) transfers specific amino acids to the ribosome during protein synthesis, matching them to the corresponding codons in the mRNA.

Front

What is a start codon and why is it important?

Back

A start codon is the first codon of a messenger RNA (mRNA) transcript that is translated by a ribosome. It signals the beginning of translation and is typically AUG, which codes for Methionine.

Front

What is the process of transcription?

Back

Transcription is the process of copying a segment of DNA into RNA. During transcription, RNA polymerase synthesizes mRNA from the DNA template.

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. Additionally, DNA uses thymine (T) while RNA uses uracil (U) instead.

Front

What is a codon?

Back

A codon is a sequence of three nucleotides in mRNA that corresponds to a specific amino acid or stop signal during protein synthesis.

Front

How many amino acids are there, and how are they related to codons?

Back

There are 20 standard amino acids, and each amino acid is coded for by one or more codons in the mRNA sequence.

Front

What is the significance of the mRNA sequence 5' AUGGUUAAA 3'?

Back

This mRNA sequence codes for the polypeptide chain consisting of the amino acids Methionine (Met), Valine (Val), and Lysine (Lys).

Front

What are the building blocks of proteins?

Back

Amino acids are the building blocks of proteins, linked together by peptide bonds to form polypeptides.

Front

What is the role of ribosomes in translation?

Back

Ribosomes are the cellular machinery that facilitate the translation of mRNA into a polypeptide chain by reading the codons and assembling the corresponding amino acids.

Front

What is the function of RNA polymerase?

Back

RNA polymerase is an enzyme that synthesizes RNA from a DNA template during the process of transcription.