Q) Describe the differences between glycogen and glucagon
Main points | |
Key idea: | Type of molecule + building blocks + bonds |
Glycogen · Polysaccharide, made up of many α glucose ·Joined by α-1,4 glycosidic bonds ·Highly branched struc ·Ref to α-1,6 glycosidic bonds at branch pts Glucagon ·Protein, made up of aa ·Joined by peptide bonds ·Globular struc due to infolding of polypep chain upon itself ·Ref to interactions (e.g. H, ionic, disulphide & hydrophobic) b/w R gps of faraway aa residues | |
Key idea: | Role + location |
Glycogen ·Energy storage mol · Stored in muscle & liver Glucagon ·Hormone; regulates bl glucose level ·Stored in the α cells, islets of Langerhans, pancreas | |
Key idea: | Solubility in water |
Glycogen ·Soluble in H2O; can be transported via blood to targe cells/tissue ·Infolding of polypep affect distribution of aa ·Ref to polar aa residues on ext surf of mol; non-polar aa residues in the interior Glucagon ·Insoluble in H2O ·Ref to polar OH gps project into mol ·Ref to large size as a contributing factor too | |
Comments: (i) Visualize the answer with the aid of a labelled diagram. (ii) Verbalize the answer + write down the main points w/o referring to the answer (use abbreviations) (iii) Read again within the next 24h & once more within 72h (do not spend more than 10min) | |
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