Page 1 of 46
BIO 181 LAB FINAL EXAM LATEST 2026-2027
QUESTIONS AND CORRECT VERIFIED ANSWERS
JUST RELEASED THIS YEAR
Question: a volume of 10 ml of a solution containing 50g/ml NaCl in H20 is added to 90 ml of
H20 to make solution 2. therefore, the final volume is 100ml. what is the final concentration of
solution 2? - CORRECT ANSWER✔✔v1c1=v2c2
x=5g/ml
Question: enzymes are composed of what - CORRECT ANSWER✔✔proteins
Question: in competitive inhibition, the inhibitor binds to the: - CORRECT ANSWER✔✔active
site
Question: in non-competitive inhibition, the inhibitor binds to: - CORRECT
ANSWER✔✔allosteric site (other site on enzyme)
1
SUCCESS!
,Page 2 of 46
Question: increasing the subtrate concentration will overcome: - CORRECT
ANSWER✔✔competitive inhibition
Question: most enzymes are very specific, meaning they: - CORRECT ANSWER✔✔only react
with certain substrates
Question: enzyme activity is influenced by which of the following: temperature, ph, or salinity -
CORRECT ANSWER✔✔all of the above
Question: what is the process called when a solute moves from an area of high concentration
to an area of low concentration? "Down" its concentration gradient - CORRECT
ANSWER✔✔diffusion
Question: what type of process is diffusion? - CORRECT ANSWER✔✔passive, does not require
any input energy
2
SUCCESS!
,Page 3 of 46
Question: what is tonicity - CORRECT ANSWER✔✔one solution's solute concentration in
comparison to another solution
Question: if two solutions are at equilibrium, what are they tonicity wise - CORRECT
ANSWER✔✔isotonic
Question: if two solutions are at different solute concentrations, then the solution with the
higher solute concentration is - CORRECT ANSWER✔✔hypertonic (hypotonic would be lower
solute concentration)
Question: what physical property of substances might explain why some of them were able to
diffuse acorss the selectively permeable membrane while others were not - CORRECT
ANSWER✔✔polar or charged molecules were able to cross through
Question: in the osmosis/diffusion lab, which substances were able to cross the selectively
permeable dialysis bag and which was not? - CORRECT ANSWER✔✔NaOH was able to cross,
phenylthalein was not able to. color change was present when naoh came through, as the PH
was altered
3
SUCCESS!
, Page 4 of 46
Question: what is the name for the amount of energy required before an energetically
favorable reaction can take place? - CORRECT ANSWER✔✔activation energy
Question: bacteria (prokaryotes) contain ______ as genetic material in the cell - CORRECT
ANSWER✔✔chromosomes and plasmids
Question: define transformation - CORRECT ANSWER✔✔phenomenon by which bacteria take-
in plasmids directly from their environment
Q:which microscope has a two-lens system? - CORRECT ANSWER✔✔compound
Question: what is the piece of microscope you look through? - CORRECT ANSWER✔✔ocular
Question: which of the parts of a microscope houses the second lens system (magnification is
written on it) on the microscope used today? - CORRECT ANSWER✔✔objectives (10x, 40x, 100x)
4
SUCCESS!
BIO 181 LAB FINAL EXAM LATEST 2026-2027
QUESTIONS AND CORRECT VERIFIED ANSWERS
JUST RELEASED THIS YEAR
Question: a volume of 10 ml of a solution containing 50g/ml NaCl in H20 is added to 90 ml of
H20 to make solution 2. therefore, the final volume is 100ml. what is the final concentration of
solution 2? - CORRECT ANSWER✔✔v1c1=v2c2
x=5g/ml
Question: enzymes are composed of what - CORRECT ANSWER✔✔proteins
Question: in competitive inhibition, the inhibitor binds to the: - CORRECT ANSWER✔✔active
site
Question: in non-competitive inhibition, the inhibitor binds to: - CORRECT
ANSWER✔✔allosteric site (other site on enzyme)
1
SUCCESS!
,Page 2 of 46
Question: increasing the subtrate concentration will overcome: - CORRECT
ANSWER✔✔competitive inhibition
Question: most enzymes are very specific, meaning they: - CORRECT ANSWER✔✔only react
with certain substrates
Question: enzyme activity is influenced by which of the following: temperature, ph, or salinity -
CORRECT ANSWER✔✔all of the above
Question: what is the process called when a solute moves from an area of high concentration
to an area of low concentration? "Down" its concentration gradient - CORRECT
ANSWER✔✔diffusion
Question: what type of process is diffusion? - CORRECT ANSWER✔✔passive, does not require
any input energy
2
SUCCESS!
,Page 3 of 46
Question: what is tonicity - CORRECT ANSWER✔✔one solution's solute concentration in
comparison to another solution
Question: if two solutions are at equilibrium, what are they tonicity wise - CORRECT
ANSWER✔✔isotonic
Question: if two solutions are at different solute concentrations, then the solution with the
higher solute concentration is - CORRECT ANSWER✔✔hypertonic (hypotonic would be lower
solute concentration)
Question: what physical property of substances might explain why some of them were able to
diffuse acorss the selectively permeable membrane while others were not - CORRECT
ANSWER✔✔polar or charged molecules were able to cross through
Question: in the osmosis/diffusion lab, which substances were able to cross the selectively
permeable dialysis bag and which was not? - CORRECT ANSWER✔✔NaOH was able to cross,
phenylthalein was not able to. color change was present when naoh came through, as the PH
was altered
3
SUCCESS!
, Page 4 of 46
Question: what is the name for the amount of energy required before an energetically
favorable reaction can take place? - CORRECT ANSWER✔✔activation energy
Question: bacteria (prokaryotes) contain ______ as genetic material in the cell - CORRECT
ANSWER✔✔chromosomes and plasmids
Question: define transformation - CORRECT ANSWER✔✔phenomenon by which bacteria take-
in plasmids directly from their environment
Q:which microscope has a two-lens system? - CORRECT ANSWER✔✔compound
Question: what is the piece of microscope you look through? - CORRECT ANSWER✔✔ocular
Question: which of the parts of a microscope houses the second lens system (magnification is
written on it) on the microscope used today? - CORRECT ANSWER✔✔objectives (10x, 40x, 100x)
4
SUCCESS!
