DNA , Protein Synthesis, and Mutation Unit Review

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What is DNA?

Back

DNA (Deoxyribonucleic Acid) is the molecule that carries the genetic instructions for life. It is composed of two strands that coil around each other to form a double helix.

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What are the four nitrogenous bases in DNA?

Back

The four nitrogenous bases in DNA are Adenine (A), Thymine (T), Cytosine (C), and Guanine (G).

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What is the role of mRNA in protein synthesis?

Back

mRNA (messenger RNA) carries the genetic information from DNA to the ribosome, where proteins are synthesized.

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What is transcription?

Back

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

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What is translation?

Back

Translation is the process by which ribosomes synthesize proteins using the information carried by mRNA.

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What is a nucleotide?

Back

A nucleotide is the basic building block of DNA and RNA, consisting of a nitrogenous base, a sugar (deoxyribose in DNA, ribose in RNA), and a phosphate group.

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What is the function of ribosomes?

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Ribosomes are the cellular structures where protein synthesis occurs, translating mRNA into polypeptide chains.

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What is the difference between DNA and RNA?

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

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What is a mutation?

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A mutation is a change in the DNA sequence that can lead to changes in protein structure and function.

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What is the significance of the base pairing rule?

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The base pairing rule states that Adenine pairs with Thymine and Cytosine pairs with Guanine, ensuring accurate DNA replication and transcription.