![]() ![]() ![]() Some gene mutations change only one tripletĬode. Mutations can result in a different amino acid sequence in The mutation rate is increased by mutagenicĪgents. They include addition, deletion, substitution, inversion, duplication and translocation of bases. Gene mutations might arise during DNA replication. Alteration of the sequence of bases in DNA can alter the structure of proteins (A-level only) Of common ailments resulting from a breakdown of these control mechanisms and the use ofĭNA technology in the diagnosis and treatment of human diseases. Which organisms and cells control their activities. Students who have studied it should develop an understanding of the ways in This has many medicalĬonsideration of cellular control mechanisms underpins the content of this Humans are learning how to control the expression of genes by altering theĮpigenome, and how to alter genomes and proteomes of organisms. Transcription being increasingly recognised as The expression of genes is not as simpleĪs once thought, with epigenetic regulation of Some are external,Įnvironmental factors, others are internalįactors. There are many factors that control the expression of genes and, thus, the In multicellular organisms, this control of translationĮnables cells to have specialised functions, forming tissues and Genetic information, they translate only part Although theĬells within an organism carry the same coded Transcription and translation of their genome. It does not store any personal data.Published 26 November 2021 | PDF | 1.2 MB 3.8 The control of gene expression (A-level only)Ĭells are able to control their metabolic activities by regulating the The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly.
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