EXAM 2025 QUESTIONS AND ANSWERS
What are some examples of organic molecules that contain functional groups? - ANS Amino
acids have amine groups, fatty acids and ketones have carboxyl groups.
What is meant by structural isomer? - ANS Molecules that have the same formula but
different structure, such as fructose and fructose, one is 5-sided and the other is 6-sided, each
has a ring form.
What are the major classes of macromolecules found in living systems? - ANS Proteins,
carbohydrates, nucleic acids, lipids.
What are polymers and what examples are there in biomolecules? - ANS Polymers are are
repeating monomer units. Carbohydrates are made up of saccharides, and proteins are made
up of amino acids.
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, What are the major differences between mono-, di-, and polysaccharides? -
ANS Monosaccharides have one monomer, disaccharides have two, and polysaccharides
have three or more.
Give three examples of monosaccharides. - ANS Glucose, fructose, galactose
Give three examples of disaccharides. - ANS Sucrose, maltose, lactose
Give three examples of polysaccharides. - ANS Starch, cellulose, glycogen
What is meant by a pentose or hexose? - ANS Pentose has five bonds and hexose has six.
Give an example of a pentose. - ANS Fructose
Give an example of a hexose. - ANS Glucose
What is meant by the straight chain structure of a carbohydrate? - ANS They have
identifiable functional groups
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