Describe transcription.

Describe transcription.

• A. The production of RNA from a DNA template
• B. The production of DNA from RNA
• C. The assembly of ribosomes
• D. The transport of proteins out of the cell

Answer: (A)

Transcription is the production of RNA from a DNA template. During this process, RNA polymerase binds to a gene’s promoter, unwinds a short DNA region, and synthesizes a complementary RNA strand by adding ribonucleotides. The resulting RNA transcript can be processed into different types of RNA, such as mRNA, rRNA, or tRNA, depending on the gene. In eukaryotes this occurs in the nucleus and is regulated by transcription factors; in prokaryotes it happens in the cytoplasm and can proceed without extensive processing. This distinguishes transcription from replication (which makes DNA from DNA) and from translation (which makes protein from RNA). It also differs from protein transport or secretion, which involve moving already synthesized proteins out of the cell. The core idea is that transcription is the synthesis of RNA using DNA as a template.

Transcription is the production of RNA from a DNA template. During this process, RNA polymerase binds to a gene’s promoter, unwinds a short DNA region, and synthesizes a complementary RNA strand by adding ribonucleotides. The resulting RNA transcript can be processed into different types of RNA, such as mRNA, rRNA, or tRNA, depending on the gene. In eukaryotes this occurs in the nucleus and is regulated by transcription factors; in prokaryotes it happens in the cytoplasm and can proceed without extensive processing. This distinguishes transcription from replication (which makes DNA from DNA) and from translation (which makes protein from RNA). It also differs from protein transport or secretion, which involve moving already synthesized proteins out of the cell. The core idea is that transcription is the synthesis of RNA using DNA as a template.