SCI 115 Week 4 Discussion

SCI 115 Week 4 Discussion

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Part 1: Post a Response

This week is all about our DNA and gene expression. The complete set of all DNA in a cell is called the genome. The complete set of all the mRNA in a cell is called the transcriptome. Read the following article about the transcriptome found at: https://www.genome.gov/13014330/transcriptome-fact-sheet/, then address the following:

  • Explain how the transcriptome helps us to better understand the differences between cells from different types of tissues that are specialized for different functions.
  • What do you think is the most interesting or significant thing about the transcriptome?

Part 2: Respond to a Peer

Read a post by one of your peers and respond, making sure to extend the conversation by asking questions, offering rich ideas, or sharing personal connections.

For guidance, view this short video:

The human genome is made up of DNA (deoxyribonucleic acid), a long, winding molecule that contains the instructions needed to build and maintain cells. These instructions are spelled out in the form of “base pairs” of four different chemicals, organized into 20,000 to 25,000 genes. For the instructions to be carried out, DNA must be “read” and transcribed – in other words, copied – into RNA (ribonucleic acid). These gene readouts are called transcripts, and a transcriptome is a collection of all the gene readouts present in a cell.

SCI 115 Week 4 Discussion

There are various kinds of RNA. The major type, called messenger RNA (mRNA), plays a vital role in making proteins. In this process: mRNA is transcribed from genes; then the mRNA transcripts are delivered to¬†ribosomes, the molecular machines located in the cell’s cytoplasm; then the ribosomes read, or “translate,” the sequence of chemical letters in the mRNA and assemble building blocks called amino acids into proteins.

DNA can also be transcribed into other types of RNA that do not code for proteins. Such transcripts may serve to influence cell structure and to regulate genes.

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