LQB182 Cell & Molecular Biology: Mid-Semester Practice Test|
ANSWERS VERIFIED
The charge state of protons, neutrons, and electrons are _______. Correct Answer: positive,
neutral, negative, respectively
The reactivity of an atom arises from ______. Correct Answer: the existence of unpaired
electrons in the valence shell
Atomic number indicates _______. Correct Answer: the number of protons
Covalent bonds differ from ionic and metallic bonds because in covalent bonding _______.
Correct Answer: pairs of electrons are shared
Water contains 2 atoms of hydrogen and 1 atom of oxygen. What bond type holds these
together? Correct Answer: covalent bonding
True or False? Polymerisation of monomers occurs due to covalent bonding between monomer
units. Correct Answer: True
The simplest hydrocarbons are comprised of _________. Correct Answer: hydrogen and carbon
Carbohydrates, Proteins, and DNA have monomers of _______. Correct Answer:
monosaccharide, amino acid, and nucleotide, respectively.
True or False? Non-polar amino acids are hydrophilic. Correct Answer: False
What parts of the amino acids Y and Z are involved in the formation of a peptide bond? Correct
Answer: carboxyl group of Y and amino group of Z
A disulphide bridge can form between which of the same two amino acid residues? Correct
Answer: Cysteine
Polypeptide chains are formed from amino acid monomers via the process of ________. Correct
Answer: dehydration
Primary protein structure contains an N terminus & C terminus, which correspond to the ______.
Correct Answer: beginning of the chain (amino group) and end of the chain (carboxyl group),
respectively.
An alpha-helix is a type of what level of protein structure? Correct Answer: Secondary structure
How is an alpha-helix structure of a polypeptide created? Correct Answer: Hydrogen bonds
between amino and carboxyl groups
ANSWERS VERIFIED
The charge state of protons, neutrons, and electrons are _______. Correct Answer: positive,
neutral, negative, respectively
The reactivity of an atom arises from ______. Correct Answer: the existence of unpaired
electrons in the valence shell
Atomic number indicates _______. Correct Answer: the number of protons
Covalent bonds differ from ionic and metallic bonds because in covalent bonding _______.
Correct Answer: pairs of electrons are shared
Water contains 2 atoms of hydrogen and 1 atom of oxygen. What bond type holds these
together? Correct Answer: covalent bonding
True or False? Polymerisation of monomers occurs due to covalent bonding between monomer
units. Correct Answer: True
The simplest hydrocarbons are comprised of _________. Correct Answer: hydrogen and carbon
Carbohydrates, Proteins, and DNA have monomers of _______. Correct Answer:
monosaccharide, amino acid, and nucleotide, respectively.
True or False? Non-polar amino acids are hydrophilic. Correct Answer: False
What parts of the amino acids Y and Z are involved in the formation of a peptide bond? Correct
Answer: carboxyl group of Y and amino group of Z
A disulphide bridge can form between which of the same two amino acid residues? Correct
Answer: Cysteine
Polypeptide chains are formed from amino acid monomers via the process of ________. Correct
Answer: dehydration
Primary protein structure contains an N terminus & C terminus, which correspond to the ______.
Correct Answer: beginning of the chain (amino group) and end of the chain (carboxyl group),
respectively.
An alpha-helix is a type of what level of protein structure? Correct Answer: Secondary structure
How is an alpha-helix structure of a polypeptide created? Correct Answer: Hydrogen bonds
between amino and carboxyl groups
