UCI Bio 93- Midterm 1 Exam Questions with correct Answers
atoms - ✔✔smallest unit of chemical elements
molecules - ✔✔two or more atoms combined
compound - ✔✔two or more elements combined in a fixed ration
C, O, H, N - ✔✔... are 4 elements that make up 96% of all living matter
covalent bond - ✔✔what is the strongest bond?
covalent - ✔✔sharing of electrons by two atoms
ionic - ✔✔transfer of electrons between two atoms
hydrogen bond - ✔✔what is a weak bond?
hydrogen bond - ✔✔the H atom forms one covalent bond and a second weaker bond with an atom in
another molecules
nonpolar - ✔✔equal sharing of electrons
(two of the same element)
polar - ✔✔unequal sharing of electrons
has a charge
(water)
negative - ✔✔what is the charge of O in water?
,positive - ✔✔what is the charge of H in water?
cohesion - ✔✔interactions between water molecules
(H2O with H2O)
solvent - ✔✔interactions between water and other molecules
4 bonds - ✔✔what is the maximum amount of bonds that hydrogen can form?
15% - ✔✔in room temperature of water what % is the maximum amount of bonds going to be made?
more acidic - ✔✔when H+ concentration increases...
more basic - ✔✔what H- concentration decreases...
hydrophilic - ✔✔affinity for water
(polar and ionic bonds)
hydrophobic - ✔✔repel water
(nonpolar covalent bonds)
buffers - ✔✔chemical processes are sensitive to pH changes and resist change in the pH solution
7.4 - ✔✔the pH of human blood is...
carbonic acid and bicarbonate - ✔✔what are the main buffers in blood?
, right - ✔✔response to a rise in pH in blood (becomes more basic)
left - ✔✔response to a drop in pH in blood (becomes more acidic)
carbon atoms - ✔✔building blocks for biological molecules
4 VE - ✔✔how many VE does carbon have?
covalent bonds - ✔✔how do functional groups join to the carbon skeleton?
hydroxyl - ✔✔-alcohols
-polar
-dissolves organic compounds (like sugars)
carbonyl - ✔✔-ketones (within skeleton)
-aldehydes (at the end of skeleton)
carboxyl - ✔✔-is acidic
-weak acid
-hydroxyl+carbonyl
amino - ✔✔-base
-animes
-can pick up H from surrounding solutions
amino and carboxyl - ✔✔what functional groups make up an amino acid?
sulfhydryl - ✔✔-thiols
atoms - ✔✔smallest unit of chemical elements
molecules - ✔✔two or more atoms combined
compound - ✔✔two or more elements combined in a fixed ration
C, O, H, N - ✔✔... are 4 elements that make up 96% of all living matter
covalent bond - ✔✔what is the strongest bond?
covalent - ✔✔sharing of electrons by two atoms
ionic - ✔✔transfer of electrons between two atoms
hydrogen bond - ✔✔what is a weak bond?
hydrogen bond - ✔✔the H atom forms one covalent bond and a second weaker bond with an atom in
another molecules
nonpolar - ✔✔equal sharing of electrons
(two of the same element)
polar - ✔✔unequal sharing of electrons
has a charge
(water)
negative - ✔✔what is the charge of O in water?
,positive - ✔✔what is the charge of H in water?
cohesion - ✔✔interactions between water molecules
(H2O with H2O)
solvent - ✔✔interactions between water and other molecules
4 bonds - ✔✔what is the maximum amount of bonds that hydrogen can form?
15% - ✔✔in room temperature of water what % is the maximum amount of bonds going to be made?
more acidic - ✔✔when H+ concentration increases...
more basic - ✔✔what H- concentration decreases...
hydrophilic - ✔✔affinity for water
(polar and ionic bonds)
hydrophobic - ✔✔repel water
(nonpolar covalent bonds)
buffers - ✔✔chemical processes are sensitive to pH changes and resist change in the pH solution
7.4 - ✔✔the pH of human blood is...
carbonic acid and bicarbonate - ✔✔what are the main buffers in blood?
, right - ✔✔response to a rise in pH in blood (becomes more basic)
left - ✔✔response to a drop in pH in blood (becomes more acidic)
carbon atoms - ✔✔building blocks for biological molecules
4 VE - ✔✔how many VE does carbon have?
covalent bonds - ✔✔how do functional groups join to the carbon skeleton?
hydroxyl - ✔✔-alcohols
-polar
-dissolves organic compounds (like sugars)
carbonyl - ✔✔-ketones (within skeleton)
-aldehydes (at the end of skeleton)
carboxyl - ✔✔-is acidic
-weak acid
-hydroxyl+carbonyl
amino - ✔✔-base
-animes
-can pick up H from surrounding solutions
amino and carboxyl - ✔✔what functional groups make up an amino acid?
sulfhydryl - ✔✔-thiols
