Mobile pieces of DNA – transposable elements – that insert themselves into chromosomes and accumulate during evolution make up more than 40% of the human genome. Element of four types – long interspersed elements (LINEs), short interspersed elements (SINEs), LTR transposons and DNA transposons – are inserted more or less […]

Q1. Acholeplasma laidlawii is a small bacterium that cannot synthesize its own fatty acids and must therefore construct it plasma membrane from whatever fatty acids are acids available at the time. If you give Acholesplasma cells access to a mixture of saturated and unsaturated fatty acids, will they thrive at […]

1. a) How are second messengers generated from phosphatidylinositol (Pl)? b) What are the main function(s) of the second messengers derived from Pl? 9. a) In the context of tumourigenesis, what is a gain-of-funtion mutation? b) List two effects that gain-of-function mutations may have on encoded protein. c) Briefly explain […]

Q1. A father who is the hemophiliac marries a woman who does not carry disease. While pregnant with their first child, an ultrasound reveals it will be a boy and the tech tells them that they are very lucky, since now they know their child will not be a hemophiliac! […]