Quiz

1-Which organelle is found only in animals?
A)acrosome
B)nucleus
C)cell wall
D)glyoxysome


2-How many life kingdoms are there?
A)2
B)3
C)4
D)5


3-This organelle functions in cellular respiration:
A)lysosome
B)endoplasmic reticulum
C)mitochondrion
D)golgi apparatus


4-The organelle functions to package and deliver proteins:
A)lysosome
B)endoplasmic reticulum
C)mitochondrion
D)golgi apparatus


5-Located near the nucleus, it is responsible for producing ribosomes
A)centrosome
B)nucleolus
C)lysosome
D)endoplasmic reticulum


6-Which structure is directly responsible for the formation of proteins within the cell.
A)lysosomes
B)vacuoles
C)centrioles
D)ribosomes


7-The rough endoplasmic reticulum has ____ located on it.
A)lysosomes
B)cytosol
C)ribosomes
D)proteins


8-The _____ controls what enters and leaves the cell.
A)mitochondrion
B)golgi apparatus
C)nucleus
D)cell membrane


9-This organelle is responsible for destroying worn-out cell parts:
A)lysosomes
B)mitochondrion
C)golgi apparatus
D)ribosomes


10-The endoplasmic reticulum functions to:
A)transport materials
B)destroy old cell parts
C)make ribosomes
D)package proteins

11-A major chemical that regulates the fluidity of animal cell membranes by stiffening the membrane at higher temperatures and preventing the membrane from freezing at lower temperature is:
A)cholesterol.
B)lipid in nature.
C)a steroid.
D)All of the choices are correct.


12-Proteins in a membrane are:
A)peripheral if they are on the inside surface held in place by the cytoskeleton.
B)integral if they are embedded in the membrane and protrude from both surfaces of the bilayer.
C)integral if they protrude from only one surface of the bilayer.
D)All of the choices are correct.


13-Active transport
A)correct requires an input of ATP.
B)is involved in diffusion.
C)occurs in osmosis and facilitated transport.
D)All of the choices are correct.


14- a phospholipid bilayer, the
A)phosphate groups are hydrophobic.
B)fatty acid tails are ionized.
C)fatty acid tails are hydrophilic.
D)proteins are located only between the two layers.
E)phosphate heads are oriented toward the exterior of the cell or toward the cytoplasm.


15-Whether a molecule can cross the plasma membrane depends upon
A)the size of the molecule.
B)the shape of the molecule.
C)the chemical properties of the molecule.
D)the charge of the molecule.
E)All of the choices are correct.


16-if a cell is placed in a hypotonic solution, which will occur?
A)Salts will move into the cell from the surrounding solution.
B)Water will move into the cell from the surrounding solution.
C)Salts will move out of the cell into the surrounding solution.
D)Water will move out of the cell into the surrounding solution.
E)None of the choices will occur.


17-Which is the best definition of osmosis?
A)The movement of molecules from an area of their higher concentration to an area of their lower concentration.
B)The movement of water across a semi permeable membrane from an area of higher water concentration to an area of lower water concentration.
C)The movement of molecules from an area of their lower concentration to an area of their higher concentration.
D)The movement of water across a semi permeable membrane from an area of lower water concentration to an area of higher water concentration.
E)The movement of a substance against its concentration gradient through the release of energy from ATP.


18-Freshwater protozoans react to a/an _____ environment by removing water through _____.
A)hypertonic, turgor pressure
B)hypotonic, turgor pressure
C)isotonic, a contractile vacuole
D)hypertonic, a contractile vacuole
E)hypotonic, a contractile vacuole


19-Plants show turgor pressure when
A)cells are losing water from their water vacuoles.
B)cells contain water vacuoles that are full of water.
C)water is being used up in photosynthesis.
D)water is being evaporated from the leaves.


20-In the cell , there is no net movement of water. The amount leaving the cell and entering the cell is the same. In what type of environment is this cell found?
hypertonic
hypotonic
isotonic
none of the above


21_Which carbohydrate is found in the exoskeleton of insects and crabs?
starch
chitin
cellulose
glycogen
glycerol


22-Which carbohydrate is used in the liver for energy storage?
starch
chitin
cellulose
glycogen
glycerol


23-Which carbohydrate is found in the cell walls of plants?
starch
chitin
cellulose
glycogen
glycerol


24-Which of the following are structural carbohydrate molecules?
starch and glycogen
starch and cellulose
glycogen and cellulose
cellulose and chitin
glycogen and chitin


25-A dehydration reaction can also be called a (an) _________ reaction since it forms water.
condensation
hydrolysis
isomeric
an energy-releasing
monomer formation


26-A polysaccharide is a polymer made up of which kind of monomers?
simple sugars
amino acids
nucleotides
alternating sugar and phosphate groups
fatty acids and glycerol


27-What term is used for molecules that have identical molecular formulas but the atoms in each molecule are arranged differently?
isotope
isomer
homomolecules
organic
balanced


28-A lipid is a polymer made up of which kind of monomers?
glucose or modified glucose molecules
amino acids
nucleotides
alternating sugar and phosphate groups
fatty acids and glycerol


29-A saturated fat
is often solid at room temperature.
has fatty acids with no double bonds between the carbon atoms.
is of animal origin.
All of the choices are correct.


30-Atherosclerosis is associated with __________________.
fats with no double bonds
fats with double bonds
phospholipids
polyunsaturated fats
long protein chains


31-Which of the following words does NOT belong with the others?
9-4-2013
fats
steroids
glycogen
phospholipids
lipids


32-Saturated fats differ from unsaturated fats in that saturated fats
are longer.
lack carbon-carbon double bonds.
have fewer double bonds.
cannot be used for an energy source.


33-A fatty acid having double bonds between carbon atoms is a(n)
phospholipid.
animal fat.
unsaturated fat.
saturated fat.


34-Triglycerides contain three fatty acids and
one glycerol.
two glycerols.
three glycerols.
four glycerols.


35-A peptide bond is found in which type of biological molecule?
carbohydrate
lipid
nucleic acid
protein


36-Below freezing and above boiling, cells are unable to function as "liquid machinery." However, most organisms' cells are still limited from functioning throughout this full range of liquid temperatures. At the molecular level in different organisms, cells' ability to vary in their tolerance to temperature, etc., is most closely related to variation in
correct enzyme activity and protein denaturation.
ATP efficiency.
ability to form glucose polymers.
replication of nucleic acids.
extent of saturation of fatty acids.


37-Which of the following is NOT a protein function?
support
transportation
defense
motion
insulation


38-hich of the following protein is correctly matched with its function?
correct hemoglobin is found within the red blood cells
myosin is found within the ligaments
actin is found within the tendons
collagen is found within the muscle cells
hemoglobin is found within the cell membrane


39-If two proteins have the same complement of amino acids, what would increase the likelihood that the two proteins would behave differently, e.g., have different functions?
correct different sequence of the amino acids within the molecules
differing numbers of double bonds formed between amino acids
different types of bonds linking the amino acids together within the molecule
the presence or absence of hydrogen bonds within the molecule
the presence or absence of ionic bonds within the molecule


40-The macromolecule composed of amino acids is a
lipid.
carbohydrate.
nucleic acid.
correct protein.
steroid.


41-The macromolecule that can accomplish the widest range of biological functions are
carbohydrates.
correct proteins.
nucleic acids.
lipids.
glycolipids.


42-Which of the following is NOT a lipid?
olive oil
fat
correct amino acid
steroid


43-A subunit of protein is a(n)
correct amino acid.
nucleic acid.
fatty acid.
phospholipid.


44-Which of the following is a function of proteins?
Contain information for the cell.
Serve as a subunit in the structure of fat.
Reduce the weight of an individual.
correct Speed up certain chemical reactions.


45-One way an amino acid differs from a lipid is that the amino acids contain
carbon.
hydrogen.
correct nitrogen.
oxygen.


46-A protein
is a macromolecule.
consists of many linked amino acids.
may be made of two or more polypeptides.
correct is correctly described by all three of these answers.


47-Enzymes are made from
fats.
correct protein.
cytoplasm.
nucleoplasm.


48-A protein that has had its physical and chemical properties changed is said to be
correct denatured.
dysfunctional.
hydrolyzed.
saturated.


49-Cell membranes, muscle cells, and tendons contain ____ proteins and enzymes, and some hormones are ____ proteins.
monomer, polymer
denatured, functional
correct structural, regulator
saturated, unsaturated


50-You find a new organic molecule that is water soluble and contains the elements carbon, nitrogen, hydrogen, and oxygen. It is probably a
correct protein.
fat.
carbohydrate.
phospholipid.


51-According to the endosymbiosis theory _______ were engulfed by larger eukaryotic cells.
mitochondria
Golgi apparatus
lysosomes
ribosomes


52-Which of the following is NOT offered as evidence in support of the endosymbiotic theory, the belief that a eukaryotic cell has evolved as a "committee" of prokaryotic cells?
Mitochondria and chloroplasts are similar in size and structure to some species of bacteria.
The ribosomes of chloroplasts and mitochondria are similar to bacteria.
Mitochondria and chloroplasts can actively break away from eukaryotic cells and live on their own.
Mitochondria and chloroplasts have their own DNA coding separate from the eukaryotic nucleus.
All of the choices offer support of the endosymbiotic theory.


53-Chloroplasts are to ____________ as ___________ are to aerobic respiration.
stroma, cristae
photosynthesis, mitochondria
thylakoid membranes, matrix
protein synthesis, lysosomes


54-_______ are to ribosomes as lipids are to _________.
carbohydrates; rough endoplasmic reticulum
nucleoli; lysosomes
sugars; peroxisomes
proteins; smooth endoplasmic reticulum


55-Without a cytoskeleton, eukaryotic cells would NOT
synthesize protein.
have an efficient way to transport materials from one organelle to another.
have an efficient means of metabolism.
communicate with adjacent cells.


56-Mitochondria have an inner membrane system called thylakoid membranes.
True
False


57-All cells have a cell wall that regulates the passage of molecules into and out of the cell.
True
False


58-Mitochondria are thought to be derived from aerobic bacteria that became part of the eukaryotic cell through endosymbiosis.
True
False


59-Membrane-bounded vesicles that contain enzymes for oxidizing small organic molecules with the formation of hydrogen peroxide are
vacuoles.
vesicles.
glyoxisomes.
lysosomes.
peroxisomes.


60-Which is NOT a characteristic of mitochondria?
A mitochondrion has two membranes.
Mitochondria are the site of cellular respiration.
Mitochondria have a single membrane for cellular respiration.
Mitochondria contain DNA and ribosomes.
The inner space of the mitochondrion contains a fluid matrix.








Answers:1-a, 2-d, 3-c, 4-d, 5-d, 6-d, 7-c, 8-d, 9-a, 10-aAnswers:1-a, 2-d, 3-c, 4-d, 5-d, 6-d, 7-c, 8-d, 9-a, 10-aAnswers:1-a, 2-d, 3-c, 4-d, 5-d, 6-d, 7-c, 8-d, 9-a, 10-aAnswers:1-a, 2-d, 3-c, 4-d, 5-d, 6-d, 7-c, 8-d, 9-a, 10-aAnswers:1-a, 2-d, 3-c, 4-d, 5-d, 6-d, 7-c, 8-d, 9-a, 10-aAnswers:1-a, 2-d, 3-c, 4-d, 5-d, 6-d, 7-c, 8-d, 9-a, 10-aAnswers:1-a, 2-d, 3-c, 4-d, 5-d, 6-d, 7-c, 8-d, 9-a, 10-a