LQB182 Cell & Molecular Biology: Mid-Semester Practice Test 2022/2023

The charge state of protons, neutrons, and electrons are _______. positive, neutral, negative, respectively The reactivity of an atom arises from ______. the existence of unpaired electrons in the valence shell 00:20 01:24 Atomic number indicates _______. the number of protons Covalent bonds differ from ionic and metallic bonds because in covalent bonding _______. pairs of electrons are shared Water contains 2 atoms of hydrogen and 1 atom of oxygen. What bond type holds these together? covalent bonding True or False? Polymerisation of monomers occurs due to covalent bonding between monomer units. True The simplest hydrocarbons are comprised of _________. hydrogen and carbon Carbohydrates, Proteins, and DNA have monomers of _______. monosaccharide, amino acid, and nucleotide, respectively. True or False? Non-polar amino acids are hydrophilic. False What parts of the amino acids Y and Z are involved in the formation of a peptide bond? carboxyl group of Y and amino group of Z A disulphide bridge can form between which of the same two amino acid residues? Cysteine Polypeptide chains are formed from amino acid monomers via the process of ________. dehydration