Navigation » List of Schools » West Los Angeles College » Physiology » Physiology 101 – Introduction to Human Physiology » Fall 2020 » Lecture Exam 1(B)
Below are the questions for the exam with the choices of answers:
Question #1
A may open in response to binding a ligand.
B only allow ions to move from the extracellular fluid into the cell.
C only allow ions to move from the intracellular fluid out of the cell.
D are not affected by differences in electrical potential across the membrane.
E are nonspecific.
Question #2
A A cell is placed into a 1 millimolar solution of substance X and over time you witness the concentration of X inside the cell decrease to 0.5 millimolar.
B A cell is placed into a 1 millimolar solution of substance X and over time you witness the size of the cell swell.
C A cell is placed into a 1 millimolar solution of substance X and over time you witness the concentration of X inside the cell increase to 1 millimolar.
D A cell is placed into a 1 millimolar solution of substance X and over time you witness the size of the cell shrink.
E A cell is placed into a 1 millimolar solution of substance X and over time you witness the concentration of X inside the cell increase to 5 millimolar.
Question #3
A Bonds between two cysteine amino acids
B Hydrogen bonds
C Van der Waals forces
D Ionic bonds
E Covalent bonds between purine and pyrimidine bases
Question #4
A FALSE
B TRUE
Question #5
A 2
B 4
C 6
D 8
E 1
Question #6
A diffusion through a channel.
B simple diffusion.
C diffusion using a pump.
D active transport.
Question #7
A Monosaccharides
B Cholesterol
C Phospholipids
D Amino acids
E Nucleotides
Question #8
A FALSE
B TRUE
Question #9
A Packaging enzymes destined for lysosomes
B Modifying proteins destined for secretion
C Transcribing a signal sequence onto proteins destined for secretion
D Addition of carbohydrate groups to proteins
E Sorting of proteins destined for various locations in the cell
Question #10
A peroxisomes
B mitochondria
C endosomes
D ribosomes
E lysosomes
Question #11
A FALSE
B TRUE
Question #12
A polyunsaturated fat
B saturated fat
C monounsaturated fat
D unsaturated fat
Question #13
A Accommodation
B Saturation
C Acclimatization
D Specificity
E Inhibition
Question #14
A It does not occur in the absence of O2.
B It is a metabolic reaction in which glucose is manufactured from large carbohydrates like glycogen.
C It may result in the formation of two molecules of lactate for each molecule of glucose.
D It does not occur in the presence of O 2.
E It is a series of metabolic reactions that occur mainly inside the inner membrane of a mitochondrion.
Question #15
A TRUE
B FALSE
Question #16
A disaccharide
B saccharide
C polysaccharide
D monosaccharide
Question #17
A FALSE
B TRUE
Question #18
A 100 mM MgCl 2
B 300 mM glucose
C 400 mM urea
D 200 mM NaCl
E 100 mM NaCl
Question #19
A Polar
B Molecule
C Ion
D Atom
E Lipophilic
Question #20
A FALSE
B TRUE
Question #21
A FALSE
B TRUE
Question #22
A TRUE
B FALSE
Question #23
A peptide
B polypeptide
C dipeptide
D monopeptide
Question #24
A Substance X will diffuse faster.
B Substance Y will diffuse faster.
C Substance X and Substance Y will diffuse at the same rate, as they are of equal size and concentration.
Question #25
A TRUE
B FALSE
Question #26
A It refers to a network of cytoplasmic filaments.
B It includes actin filaments.
C It is important for cellular movement.
D It helps to determine a cell’s shape.
E It refers to the cellular components of bone.
Question #27
A The term “tonicity” refers to the effect that a solution has on the degree of stretch or shrinking of the cell membrane.
B Hypertonic solutions are always hyperosmotic.
C The term “osmolarity” refers to the osmotic properties of a solution, regardless of its tonicity.
D Isotonic solutions are always isoosmotic.
E Hypoosmotic solutions are always hypotonic.
Question #28
A FALSE
B TRUE
Question #29
A FALSE
B TRUE
Question #30
A The Na +/K + pump creates an electrical disequilibrium.
B The Na +/K + pump is an example of counter transport.
C It is expressed only on select cell types
D The Na +/K + pump creates chemical disequilibrium.
E The Na +/K + pump directly uses ATP
Question #31
A A new element
B A free radical
C A cation
D An anion
E A covalent molecule
Question #32
A TRUE
B FALSE
Question #33
A It starts with a UTR sequence, then is followed by a promoter and then the coding sequence
B It starts with a promoter, then is followed by a 3′ UTR, a coding sequence and then a 5’UTR
C It starts with a promoter, then is followed by a 5′ UTR, a coding sequence and then a 3’UTR
D It starts with a promoter, then is followed by a 5′ UTR, a 3’UTR and then the coding sequence
Question #34
A is a measure of the concentration of hydrogen atoms in the solution.
B increases as the acidity of the solution increases.
C increases as the free hydrogen ion concentration in the solution increases.
D is a measure of the concentration of free hydrogen ions in the solution.
E is a measure of the concentration of hydrogen ions bound to other molecules in the solution.
Question #35
A FALSE
B TRUE
Question #36
A Krebs cycle
B Oxidative phosphorylation
C Glycolysis
D None of the choices are correct.
E The breakdown of fatty acids to CO 2 and H 2O
Question #37
A Providing genetic information
B Generating ATP
C Regulating the passage of molecules into and out of the cell
D Storing calcium ions
E Storing organic chemicals for metabolism
Question #38
A It involves a specific membrane protein that functions as a carrier molecule.
B There is no limit to how fast it can occur as the concentration gradient becomes larger.
C It is always directly coupled to the splitting of ATP molecules.
D It is the main mechanism fortransportinghydrophobic molecules across membranes.
E It always involves the movement of substances against a concentration gradient.
Question #39
A FALSE
B TRUE
Question #40
A TRUE
B FALSE
Question #41
A amphipathic.
B unipolar.
C bipolar.
D hydrophobic.
E hydrophilic.
Question #42
A TRUE
B FALSE
Question #43
A TRUE
B FALSE
Question #44
A The plasma membrane is a layer of phospholipid molecules with their hyrophilic head groups in contact with the extracellular solution and the hydrophobic tail groups in contact with the intracellular solution.
B Peripheral membrane proteins function as channels associated with transport of ions through the membrane.
C Some proteins integrated into the membrane serve as channels for the passage of nonpolar molecules through the membrane.
D The phospholipid bilayer is arranged so that the hydrophilic heads of the phospholipid molecule face the extra- and intracellular fluids.
E Cholesterol molecules function to transport ions from one side of the plasma membrane to the other.
Question #45
A Facilitated diffusion
B Simple diffusion
C Primary active transport
D Secondary active transport
E None of these can occur without the direct use of ATP
Question #46
A It is covalent.
B It has no net electrical charge.
C It has opposite electrical charge at each end.
D It is ionized.
Question #47
A are polymers of ATP that store large amounts of energy.
B are broken down during chemical reactions they catalyze.
C can be carbohydrate molecules.
D have names generally ending in the suffix “-ose.”
E are catalysts in chemical reactions.
Question #48
A TRUE
B FALSE
Question #49
A triacylglycerol.
B protein.
C starch.
D cellulose.
E glycogen.
Question #50
A generate ATP and electron carriers NADH and FADH2
B take place in the cytosol of human cells.
C produce pyruvate and lactate as end products.
D take place only when no oxygen is present.
E generate ATP and the electron carrier NADH
Question #51
A The ratio of protons to electrons
B The number of protons
C The number of electrons
D The number of bonds it can form
E The number of neutrons
Question #52
A a protein.
B used to transfer energy within a cell.
C a molecule with less total energy content than ADP.
D used by cells for the storage of energy.
E formed during the hydrolysis of ADP.
Question #53
A TRUE
B FALSE
Question #54
A Synthesis and packaging of proteins for secretion from the cell or export to other organelles
B Generation of ATP
C Transcription of DNA into RNA
D Synthesis of lipids and intracellular storage of calcium ions
E Digestion of engulfed bacteria and cellular debris
Question #55
A By phosphorylating a reactant
B By increasing the energy content of the product molecules
C By decreasing the energy of activation
D By acting as one of the reactant molecules
E By increasing the temperature of a solution
Question #56
A It is a polar molecule.
B It is a nonpolar molecule.
C It is an amphipathic molecule.
Question #57
A TRUE
B FALSE
Question #58
A TRUE
B FALSE
Question #59
A Solutes
B Water
C Lipid molecules
D Charged particles
E Glucose
Question #60
A It will shrink in size.
B The result can’t be predicted
C It will swell in size.
D It will stay the same size.
Question #61
A Secondary
B Primary
C Tertiary
D Quaternary
Question #62
A FALSE
B TRUE
Question #63
A is called transcription of the message.
B is called translation of the message.
C requires an RNA polymerase
D produces an RNA transcript
E occurs in the cytoplasm.
F requires DNA polymerase.