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67 Cards in this Set

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b
the equal sharing of electrons between atoms(as seen in methane) is called a(n):

a.ionic bond
b.polar covalent bond
c.james bond
d.hydrogen bond
d
which of the following depend on membrane proteins for transport into or out of a cell:

a.faciliated diffusion
b.osmosis
c.active transport
d.both a and c
e.none of these
c
which is the correct order of the following according to the levels of organization in nature?

a.cell,organelle,organ,tissue,organ sytem,organism
b.organism,cell,tissue,organ,organelle,organ system
c.organelle,cell,tissue,organ,organ system,organism
d.tissue,organ system,organ,organism,organelle,cell
e.none of these
glycerol
fatty
a monomer of most lipids has two parts-the ___________ portion and the ___________ acid chains.
created
destroyed
the two main forms of energy in both mechanical and living systems are kinetic energy(action) and stored energy (potental or position). From the Laws of Thermodynamics, we know that energy is never ____________ nor ____________, but merely changes from one form to another
dehydration synthesis

hydrolysis
monomers are joined together to form larger polymers throught the chemical reaction called ______________. polymers are broken down into the monomers that make them up through the chemical reaction called ___________.
b
which of the following terms includes all the others in the list?
a.polysaccharide
b.carbohydrate
c.monosaccharide
d.disaccharide
fatty acids

glycerol
one molecule of fat is made by joining three molecules of ____________ to one molecule of _____________.
saturated
__________ fats contain the maximum number of hydrogens along the tail.
nitrogen
what chemical element is present in proteins and nucleic acids, but not in sugars and fats?
d
changing one amino acid within a protein could change what about a protein?

a.the primary structure
b.the overall shape of the protein
c.the function of the protein
d.all of the above
a
a shortage of phosphorus in the soil would make it especially difficult for a plant to manufacture

a.DNA
b.Proteins
c.Cellulose
d.Fatty acids
e.Sucrose
starch

nucleotide
a glucose molecule is to ___________ as a _____________ is to a nucleic acid.
d
which of the following elements is least abundant in your body?

a.carbon
b.oxygen
c.phosphorus
d.iron
MgCL2 and C2H6
which of the following are compounds?

MgCL2, H2, Fe, C2H6
element
a chemical compound is to a ___________ as a body organ is to a tissue
electrons

neutrons

protons
an atom can be changed into an ion by adding or removing__________. an atom can be changed into a different isotope by adding or removing____________. but if you change the number of ___________, the atom becomes a different element.
2
a sulfur atom has 6 electrons in its third shell, whcih is its outer shell. as a result, it forms __________ covalent bonds with other atoms.
d
which of the following is not a chemical reaction?

a.sugar and oxygen gas combine to form carbon dioxide and water.
b.sodium metal and chlorine gas unite to form sodium chloride.
c.hydrogen gas combines with oxygen gas to form water
d.ice melts to form liquid water
a
a polar molecule

a.is slightly negative at one end and slightly positive at the other end.
b.has an extra electron, giving it a positive charge
c.has an extra electron, giving it a negative charge.
d.has covalent bonds.
element
a chemical compound is to a ___________ as a body organ is to a tissue
electrons

neutrons

protons
an atom can be changed into an ion by adding or removing__________. an atom can be changed into a different isotope by adding or removing____________. but if you change the number of ___________, the atom becomes a different element.
2
a sulfur atom has 6 electrons in its third shell, whcih is its outer shell. as a result, it forms __________ covalent bonds with other atoms.
d
which of the following is not a chemical reaction?

a.sugar and oxygen gas combine to form carbon dioxide and water.
b.sodium metal and chlorine gas unite to form sodium chloride.
c.hydrogen gas combines with oxygen gas to form water
d.ice melts to form liquid water
a
a polar molecule

a.is slightly negative at one end and slightly positive at the other end.
b.has an extra electron, giving it a positive charge
c.has an extra electron, giving it a negative charge.
d.has covalent bonds.
d
emily would like to film the movement of chromosomes during cell division. her best choice for a microscope would be a

a.light microscope, because of its magnifying power.
b.transmission electron microscope, becasue of its resolving power
c.scanning electron microscope, because the chromosomes are on the cell surface
d.light microscope, because the specimen must be kept alive.
b
you look into a light microscope and view an unknow cell. what might you see that would tell you whether the cell is prokaryotic or eukaryotic?

a.a rigid cell wall
b.a plasma membrane
c.a nucleus
d.ribosomes
bacteria

archaea
prokaryotic cells are characteristic of _________ and _________.
b
which best describes the structure of the plasma membrane?

a.proteins sandwiched between two layers of phospholipid
b.proteins embedded in tow laters of phospholipid
c.a layer of protein coating a layer of phospholipid
d.phosholipids embedded in two layers of protein
smooth er

rough er
the ER has two distinct regions that differ in structure and function. lipids are synthesized within the ___________, and proteins are synthesized within the _________.
it is converted to potential energy and heat
you have to expend considerable energy to carry a heavy sofa up a flight of stairs. since energy cannot be destroyed, what happens to all the energy you spend?
energy

entropy
___________is the capacity to perform work, while_________is a measure of randomness.
b
if someone sitting at the other end of a restaurant smokes a cigarette, you may still beathe in some of that smoke. the movement of smoke through the air of the restaurant is an example of what type of transport?

a.osmosis
b.facilitated diffusion
c.diffusion
d.active transport
a
the total solute concentration in a red blood cell is about 2%. sucrose cannot pass through a red blood cell's plasma membrane, but water and urea can. osmosis will cause such a cell to shrink the most when the cell is immersed in which of the following?

a.a hypertonic sucrose solution
b.a hypotonic sucrose solution
c.a hypertonic urea solution
d.a hypotonic urea solution
b
which of the following types of cellular transport require(s) an expenditure of energy?

a.facilitated diffusion
b.active transport
c.osmosis
d.a and b
signal transduction pathway
a ______________ is a process that links the reception of cell signals to responses within the cell.
d
the atom sodium contains 11 electrons, 11 protons, and 12 neutrons. what is the mass number (atomic weight) of sodium?

a.0
b.11
c.22
d.23
e.34
e
the lower the pH

a.the greater the hydrogen ion concentration
b.the more acid the solution
c.the lower the pH number
d.the less basic the solution
e.all of these are true
a
which solution is a stronger acid?

a.pH=1
b.pH=8
c.pH=14
d.pH=7
e.all of these
b
the measurement of hydrogen ion concentration in solution (which indicates acidity and/or alkalinity) is called the

a.buffer
b.pH
c.alkalinity
d.neutrality
e.atomic number
c
when two molecules are broken apart by adding water: AB+h2o---->A+B. this is called:

a.alkalinity
b.dehydration synthesis
c.hydrolysis
d.amphipathic
a
which biological macromolecule type is insoluble in water and includes steroids and oils?

a.lipids
b.monosaccharides
c.nucleic acids
d.proteins
e.carbohydrates
b
which association is NOT correct?

a.nucleic acids---genes
b.carbohydrate---enzymes
c.fats---long term energy storage
d.cellulose---structural carbohydrate
large central vacuole
this cell organelle contains plant cell fluid....__________
lysosome
___________ contains hydrolytic enzymes to "clean up" a cell.
chloroplast
___________ is the site of photosynthesis
exocytosis
when a cell expels material out past its membrane, ____________ occurs
1000
each scale change in this series takes us a ____________ times closer
biospher

molecules
biologists explore life at levels ranging from the ________ to the _________ that make up cells
DNA
the legal applications of ___________ technology have become very public in the past decade. This is just one example of biology's prominent role in society today.
oxygen,carbon,hydrogen,and nitrogen
________,_________,________,and _________ make up 96.3% of the weight of the human body.
2
2
2
a helium atom consists of _____ protons _________ neutrons and _______ electrons.
1
the atomic number (number of protons) of hydrogen is....
6
the atomic number (number of protons) of carbon is......
7
the atomic number (the number of protons) of nitrogen is .....
8
the atomic number (the number of protons) of oxygen is....
carbon based
___________ based molecules make up the majority of life.
monosaccharides
glucose, ribose, and fructose are examples of....
disaccharides
sucrose, maltose, and lactose are examples of....
polysaccharides
starch, cellulose, glycogen, and chitin are examples of....
proteins
_________ are the most diverse biological group.
amino acid
the basic unit of protein is ____________.
proteins
___________ have 4 levels of 3 dimensional complexity...primary, secondary, tertiary, and quaternary
nucleic acids
_________ are the blueprint of life.
G, C, and A
the three nitrogen bases that are the same in DNA and RNA are ....
DNA

RNA
______ uses T, while _________ uses U
paramecium
an example of a protest contractile vacuole is a ___________.