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Biological Molecules Exam Questions with Verified Answers
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Biological Molecules Exam Questions with Verified Answers
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Biological Molecules Exam Questionswith Verified Answers
What are anabolic reactions? - Answer-Building larger molecules from smaller ones
(e.g. starch from glucose)
What is a condensation reaction? - Answer-When two molecules bond through the loss
of a water molecule.
What is a catabolic reaction? - Answer-Breaks down larger molecules into smaller
molecules eg: digestion
What is a hydrolysis reaction? - Answer-A covalent bond is broken by adding a
molecule of water.
What is a monomer? - Answer-a single, small molecule which can join together to form
a polymer
What are examples of monomers? - Answer-Monosaccharides (simple sugars- glucose)
, amino acids and nucleotides
Why can carbon form so many compounds? - Answer-it has a valency of 4, so can form
4 single covalent bonds with other atoms
How does hydrogen bonding occur? - Answer-Slightly negatively charged oxygen atoms
attract slightly positively charged hydrogen atoms of other water molecules.
This is because oxygen has a greater pull on shared electrons than the hydrogen, so
electrons are not shared evenly
This makes water a polar molecule
What useful properties does hydrogen bonding provide? - Answer-Good Solvent,
Transport Medium, Cohesion, Ice is less dense than water so insulates water below,
Thermal Stability, Metabolite
Describe the Structure of an Amino Acid - Answer--Amino group (NH2) which is a basic
group (LEFT);
-Carboxyl group (COOH) which is an acidic group (RIGHT);
-Hydrogen atom (H) (BOTTOM);
-R group which is a variety of different chemical groups (TOP)
How many different amino acids are there? - Answer-20
What is the primary structure of a protein? - Answer-sequence of amino acids joined by
peptide bonds
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