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University Degree: Applied Biology

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  • Marked by Teachers essays 2
  1. Marked by a teacher

    Should a DNA profile be taken at birth?

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    The process of electrophoresis is used to gather 'non coding DNA' (areas of short tandem repeats, STRs) using restricting enzymes. There are two common methods of separation and detection, capillary electrophoresis and gel electrophoresis Almost 99.8% of our DNA is identical; accordingly this process focuses on that .2% that is different. 3 Crime scenes and paternity tests alike can be an influential factor in determining if someone was involved or is a relation respectively. Within the controlled paternity environment sufficient DNA can be obtained but under the contamination and pressures of a crime scene the process becomes increasingly difficult.

    • Word count: 1264
  2. Marked by a teacher


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    They may coexist with a decrease in their potential for growth. Neutralism is the most common type of interspecific interaction. Neither population affects one another nor are any interactions that do occur indirect or incidental. Amensalism is when one species suffers and the other interacting species experiences no effect at all. This is may be viewed as a very asymmetric form of competition. Mutualism is an interspecific interaction between two species, which benefits both members. Populations of each species grow, survive and may or may not reproduce at a higher rate in the presence of other species.

    • Word count: 1152
  3. Isolation & Characterisation of Proteins

    Distance migrated (cm) (Distance migrated)-1 Size of fragments (kb) 1.5 0.667 25.05 2.2 0.455 15.87 2.7 0.370 12.19 3.1 0.323 10.16 3.8 0.263 7.56 5.5 0.182 4.06 11.2 0.089 0.04 Calculation: To calculate for the fragment size of DNA fragment digested by HindIII, using the equation from the graph above: y = 0.0231 x + 0.0883 Let y be the (distance migrated)-1 and x be the size of fragment, When y = 0.667 0.667 = 0.0231x + 0.0883 x = = 25.05 kb When y = 0.455 0.455 = 0.0231x + 0.0883 x = = 15.87 kb When y =

    • Word count: 1458

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