15 Questions
Which of the following is NOT considered one of the 4 major types of biomolecules?
Proteins
Which chemical group can R represent in biomolecules?
Alkyl group
Which category does monosaccharides belong to?
Carbohydrates
What is the primary function of nucleotides?
Information storage
Which type of biomolecule is made up of polypeptides?
Proteins
What are the abundant elements in living organisms?
Carbon, nitrogen, oxygen, hydrogen
What is the primary reason for grouping the 20 amino acids according to the chemical nature of their side chains?
To understand the properties of different amino acids in proteins
Why are L- and D-Enantiomers important in the context of amino acids?
They indicate the stereochemistry of amino acids
What is the significance of the Kjeldahl method in protein measurement?
It provides an indirect estimation of nitrogen content in food items
Why do different food items have different protein conversion factors for the Kjeldahl method?
Based on the percentage of different amino acids in proteins
What is the purpose of using melamine in the context of protein adulteration?
To fraudulently increase the apparent protein content
Which ionizable groups are present in free amino acids?
$NH_2^+$ and $COO^-$ groups
What is the role of the α-carboxyl group and α-amino group in amino acids?
They are involved in the ionization properties of amino acids
"Form II" of an amino acid, at physiological pH, has which charge(s)?
$NH_2^+$ positive charge and $COO^-$ negative charge
"K1" and "K2" are dissociation constants for which groups in an amino acid?
$NH_2^+$ and $COO^-$ groups
Prepare for BIOL1110 Module 1 on Biomolecules and Metabolism with prior knowledge of HKDSE Chemistry (or equivalent) or CHEM1041 Foundations of Chemistry. References include biochemistry textbooks like Principles of Biochemistry by Moran, Horton, Scrimgeour, and Perry.
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