Use of organisms for genetic purposes

1. Describe and explain the structure of deoxyribonucleic acid, highlighting the important structural and function regions. You are strongly recommended to use labelled drawings to fully demonstrate your understanding. 2a. Explain how a transgenic bacterial cell containing the human insulin gene could be created. You must include information on the restriction enzyme used and any details of the bacterial plasmid you think are relevant. 2b. Describe one mechanism for genetically modifiying a eukaryotic organism, explaining the potential difficulties of your chosen method. 2c. Differentiate between selective breeding and cloning as mechanisms for preserving desirable characteristics in farm animals.

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