BIO 110 PRACTICE EXAM QUESTIONS WITH ACCURATE
ANSWERS
12C and 14C have the same number of protons but different number of neutrons,
they are blank of the same element. correct answer isotopes
A chemical reaction that takes monomers and joins them together, by removing
water, to make a polymer is called a blank reaction correct answer dehydration
A prokaryotic cell differs from an eukaryotic cell because... correct answer
prokaryotic cells have no double membrane bound organelles and eukaryotic cells
do have them
A substance that speeds up the rate of a chemical reaction is called a correct
answer catalyst
An amphipathic molecule, like a phospholipid, is important for membrane
formation because it has.... correct answer both a hydrophilic and a hydrophobic
region in the same molecule
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. correct
answer Proton
An element is correct answer A pure substance of only one kind of atom
At 37 degrees C, phospholipids can rotate and move laterally easily, molecules
can exchange places with their neighbors about 10^7 times per second. The
, movement of a phospholipids from one leaflet of the membrane to another takes
energy and the help of an enzyme catalyst. What is the name of this catalyst?
correct answer flippase
C12 and C14 are isotopes of the carbon atom. What is different about these two
isotopes? correct answer C14 has 2 more neutrons than C12
Carbon has an atomic number of 6, why can it form 4 covalent bonds with other
atoms? because.... correct answer it has four valance electrons
Cell surface molecules are labeled with a fluorescent tag and then a portion of
them are bleached with a laser beam. What would one observe after the cell is
incubated at 37 degrees C for a few minutes? correct answer The bleached
molecules would diffuse laterally through the membrane and intermix with
unbleached molecules.
Choose the term that is NOT a property of water. correct answer nonpolar
covalent bonds
Cyanide binds and impairs one of the molecules involved in the production of
ATP. Which organelle would you think cyanide acts upon? correct answer
mitochondria
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. correct answer electronegativity
ANSWERS
12C and 14C have the same number of protons but different number of neutrons,
they are blank of the same element. correct answer isotopes
A chemical reaction that takes monomers and joins them together, by removing
water, to make a polymer is called a blank reaction correct answer dehydration
A prokaryotic cell differs from an eukaryotic cell because... correct answer
prokaryotic cells have no double membrane bound organelles and eukaryotic cells
do have them
A substance that speeds up the rate of a chemical reaction is called a correct
answer catalyst
An amphipathic molecule, like a phospholipid, is important for membrane
formation because it has.... correct answer both a hydrophilic and a hydrophobic
region in the same molecule
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. correct
answer Proton
An element is correct answer A pure substance of only one kind of atom
At 37 degrees C, phospholipids can rotate and move laterally easily, molecules
can exchange places with their neighbors about 10^7 times per second. The
, movement of a phospholipids from one leaflet of the membrane to another takes
energy and the help of an enzyme catalyst. What is the name of this catalyst?
correct answer flippase
C12 and C14 are isotopes of the carbon atom. What is different about these two
isotopes? correct answer C14 has 2 more neutrons than C12
Carbon has an atomic number of 6, why can it form 4 covalent bonds with other
atoms? because.... correct answer it has four valance electrons
Cell surface molecules are labeled with a fluorescent tag and then a portion of
them are bleached with a laser beam. What would one observe after the cell is
incubated at 37 degrees C for a few minutes? correct answer The bleached
molecules would diffuse laterally through the membrane and intermix with
unbleached molecules.
Choose the term that is NOT a property of water. correct answer nonpolar
covalent bonds
Cyanide binds and impairs one of the molecules involved in the production of
ATP. Which organelle would you think cyanide acts upon? correct answer
mitochondria
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. correct answer electronegativity
