Structure of RNA - Gene expression - Higher Biology.
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SCIENCE A BIOLOGY Higher Tier Unit Biology B1 Tuesday 16 May 2017 Afternoon Time allowed: 1 hour Materials For this paper you must have: a ruler. You may use a calculator. Instructions Use black ink or black ball-point pen. Fill in the boxes at the top of this page. Answer all questions.
In this lesson, you'll explore RNA structure and learn the central dogma of molecular biology. Along the way, you'll meet the three types of RNA and see how the cell uses them most effectively.
RNAi is a fairly new tool that molecular biologist use to inhibit gene expression. RNAi can inhibit gene expression in two ways. Please describe the principle of RNAi and the two ways in which RNAi can inhibit gene expression. RNAi refers to RNA interference. It is a process of gene silencing, which.
Messenger RNA (mRNA) plays an important role in the transcription of DNA. Transcription is the process in protein synthesis that involves copying the genetic information contained within DNA into an RNA message. During transcription, certain proteins called transcription factors unwind the DNA strand and allow the enzyme RNA polymerase to transcribe only a single strand of DNA. DNA contains.
Translation (mRNA to protein) This is the currently selected item. Overview of translation. tRNAs and ribosomes. Stages of translation. Protein targeting. Practice: Translation. Video transcript - (Voiceover) So we already know that chromosomes are made up of really long strands of DNA all wound up into themselves, so something like, well I'm just kind of drawing it as a random long strand of.