DNA RNA and Protein Synthesis

Front

What is the structure of RNA?

Back

RNA is a single-stranded molecule made up of nucleotides, which include a ribose sugar, a phosphate group, and nitrogenous bases (adenine, uracil, cytosine, and guanine).

Front

What is the structure of DNA?

Back

DNA is a double-stranded helix composed of nucleotides, which include a deoxyribose sugar, a phosphate group, and nitrogenous bases (adenine, thymine, cytosine, and guanine).

Front

What is transcription?

Back

Transcription is the process of synthesizing messenger RNA (mRNA) from a DNA template in the nucleus.

Front

What is translation?

Back

Translation is the process of synthesizing proteins from mRNA at the ribosome, where transfer RNA (tRNA) brings amino acids to the growing polypeptide chain.

Front

What is the role of mRNA?

Back

mRNA carries the genetic information from DNA to the ribosome, where it serves as a template for protein synthesis.

Front

What is the role of tRNA?

Back

tRNA transports specific amino acids to the ribosome during translation, matching its anticodon with the codon on the mRNA.

Front

What is a codon?

Back

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

Front

What is an anticodon?

Back

An anticodon is a sequence of three nucleotides on tRNA that is complementary to a codon on mRNA, allowing for the correct amino acid to be added during translation.

Front

What is the significance of the DNA sequence CUG?

Back

The DNA sequence corresponding to the mRNA codon CUG is GAC, which codes for a specific amino acid.

Front

What is the difference between DNA replication and transcription?

Back

DNA replication is the process of copying the entire DNA molecule to produce two identical copies, while transcription is the process of creating a single strand of mRNA from a specific gene on the DNA.