BIO 110 practice exam Questions with
Verified Answers
An atom is composed of three subatomic particles, name the particle that has a positive
charge and is also used as the atomic number of an element. - ANSWERSProton
An element is - ANSWERSA pure substance of only one kind of atom
12C and 14C have the same number of protons but different number of neutrons, they
are blank of the same element. - ANSWERSisotopes
During covalent bond formation, the sharing of electrons is not always equal. A good
example of this is water molecule. Oxygen tends to "hog" the electrons rather than
share them equally with the hydrogen atoms. This occurs because oxygen has a higher
blank than hydrogen. - ANSWERSelectronegativity
What type of bond holds an individual water molecule together? - ANSWERSpolar
covalent
A substance that speeds up the rate of a chemical reaction is called a -
ANSWERScatalyst
Choose the term that is NOT a property of water. - ANSWERSnonpolar covalent bonds
Human blood normally has a pH value of 7.4, orange juice had a pH value of 3.5, which
is the most acidic? - ANSWERSorange juice
Carbon has an atomic number of 6, why can it form 4 covalent bonds with other atoms?
because.... - ANSWERSit has four valance electrons
What is the difference between B-D-glucose and B-L glucose? - ANSWERStheir
carbons are numbered differently, B-D glucose is numbered clockwise and B-L glucose
is numbered counter clockwise
A chemical reaction that takes monomers and joins them together, by removing water,
to make a polymer is called a blank reaction - ANSWERSdehydration
Name the molecule(s) that is (are) a member of the four major classes of organic
molecules found in living organisms. - ANSWERScarbohydrates
proteins
What are saturated fatty acids saturated with? - ANSWERShydrogen atoms
Verified Answers
An atom is composed of three subatomic particles, name the particle that has a positive
charge and is also used as the atomic number of an element. - ANSWERSProton
An element is - ANSWERSA pure substance of only one kind of atom
12C and 14C have the same number of protons but different number of neutrons, they
are blank of the same element. - ANSWERSisotopes
During covalent bond formation, the sharing of electrons is not always equal. A good
example of this is water molecule. Oxygen tends to "hog" the electrons rather than
share them equally with the hydrogen atoms. This occurs because oxygen has a higher
blank than hydrogen. - ANSWERSelectronegativity
What type of bond holds an individual water molecule together? - ANSWERSpolar
covalent
A substance that speeds up the rate of a chemical reaction is called a -
ANSWERScatalyst
Choose the term that is NOT a property of water. - ANSWERSnonpolar covalent bonds
Human blood normally has a pH value of 7.4, orange juice had a pH value of 3.5, which
is the most acidic? - ANSWERSorange juice
Carbon has an atomic number of 6, why can it form 4 covalent bonds with other atoms?
because.... - ANSWERSit has four valance electrons
What is the difference between B-D-glucose and B-L glucose? - ANSWERStheir
carbons are numbered differently, B-D glucose is numbered clockwise and B-L glucose
is numbered counter clockwise
A chemical reaction that takes monomers and joins them together, by removing water,
to make a polymer is called a blank reaction - ANSWERSdehydration
Name the molecule(s) that is (are) a member of the four major classes of organic
molecules found in living organisms. - ANSWERScarbohydrates
proteins
What are saturated fatty acids saturated with? - ANSWERShydrogen atoms
