Cell Biology And Chemistry

You MUST answer the compulsory seen essay, question 1, PLUS 1 additional essay question. Each essay is worth 25% of the overall marks for the paper 1.Seen Question Starch and galvanising cellulose atomic number 18 both polymers of D-glucose, still they check divers(prenominal) properties and divisions. (a) With the handling of diagrams show how the molecular buildings of amylum and cellulose differ (60 %) (b)Why do glucose, starch and cellulose have unlike properties (20 %) (c) How do the properties of these molecules relate to their function (20 %) 2. Proteins form complex, iii dimensional structures stabilised by different types of bond, interaction or commit. (a) come upon in detail three types of bond, interaction or force that are involved in stabilising the structure of proteins (40 %) (b) The alpha-helix and beta-sheet are examples of protein secondary structure. What are the master(prenominal) features of these two structures. Where possible use d iagrams to illustrate your answer (50 %) (c)Explain the hurt tertiary structure and quarternary structure of proteins (10 %). 3.

(a) How do the smooth ER and rough ER differ in; (i) appearance (10 %) (ii) in function (40 %) (b) stray a diagram to show the expatiate structure of a phospholipid molecule and Indicate the location and orientation course of the molecules within the cell membrane (20 %) (c)What are the different classes proteins that would be found in a typical plasma membrane (30 %) 4. (a)Define the quest terms using diagrams where possible (30 %) i) Phagocytosis ii ) Pinocytosis iii) Exocyt! osis (b)Describe and discuss, with the aid of diagrams, the defecate at of receptor-mediated endocytosis (70 %)If you want to get a full essay, tramp it on our website: BestEssayCheap.com

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