BIO 215 Test 2 UPDATED Exam Questions
and CORRECT Answers
Aerobic refers to what property of chemotrophs? - CORRECT ANSWER - Chemotrophs
require oxygen to convert energy into a usable form.
Which of the following statements is true concerning catabolic pathways? - CORRECT
ANSWER - They supply energy, primarily in the form of ATP, for the cell's work.
Which of the following is true of an enzyme? An enzyme __________. - CORRECT
ANSWER - acts as a biological catalyst
Which match is not correct regarding the phosphate-transferring enzymes? - CORRECT
ANSWER - phosphatase: catalyzes the hydrolyltic removal of phosphates
kinase: catalyzes the transfer of phosphate involving an organic source (e.g. ATP)
phophorylase: catalyzes the transfer of inorganic phosphate (Pi)
ALL OF THE ABOVE ARE CORRECT
In a given chemical reaction, if the reactants contain more free energy compared to the products,
the reaction will be... - CORRECT ANSWER - exergonic
Which term most precisely describes the cellular process of breaking down large molecules into
smaller ones? - CORRECT ANSWER - catabolism
Which of the following is a statement of the first law of thermodynamics? - CORRECT
ANSWER - Energy cannot be created or destroyed
Chemical energy into mechanical energy - CORRECT ANSWER - use of blood sugar as a
source of energy for muscle contraction; important for animal motility
, chemical energy into light energy - CORRECT ANSWER - chemical energy to case flash
of light by firefly; important as mating signal
Solar (light energy) into chemical energy - CORRECT ANSWER - sunlight to synthesize
sugar; entire biosphere depends on this process as its energy link with the sun
chemical energy into electrical energy - CORRECT ANSWER - chemical energy to
generate a potential and deliver an electric shock ; defense mechanism of electric eel
chemical energy into the potential energy of a concentration gradient - CORRECT
ANSWER - chemical energy to pump protons into the stomach and maintain low PH; aid
to digestion of foodstuffs
True or False?: Heterotrophs can convert inorganic carbon into organic carbon. - CORRECT
ANSWER - False
Only autotrophic organisms have the ability to convert inorganic carbon (CO2) into organic
carbon. Heterotrophs must take in organic carbon in order to generate the organic molecules they
need for their growth/development and cell maintenance.
Which of the following is (are) true for anabolic pathways? - CORRECT ANSWER - they
consume energy to build up polymers from monomers
Which is not true of phototrophs? - CORRECT ANSWER - they can not function as
autotrophs
In a given 'system' (e.g. a chemical reaction taking place inside of a cell), the amount of energy
available to do work is called _____________. - CORRECT ANSWER - Free energy
Energy is observed in two basic forms: potential and kinetic. Which of the following correctly
matches these forms with a source of energy? - CORRECT ANSWER - the covalent bonds
of a sugar molecule: potential energy
and CORRECT Answers
Aerobic refers to what property of chemotrophs? - CORRECT ANSWER - Chemotrophs
require oxygen to convert energy into a usable form.
Which of the following statements is true concerning catabolic pathways? - CORRECT
ANSWER - They supply energy, primarily in the form of ATP, for the cell's work.
Which of the following is true of an enzyme? An enzyme __________. - CORRECT
ANSWER - acts as a biological catalyst
Which match is not correct regarding the phosphate-transferring enzymes? - CORRECT
ANSWER - phosphatase: catalyzes the hydrolyltic removal of phosphates
kinase: catalyzes the transfer of phosphate involving an organic source (e.g. ATP)
phophorylase: catalyzes the transfer of inorganic phosphate (Pi)
ALL OF THE ABOVE ARE CORRECT
In a given chemical reaction, if the reactants contain more free energy compared to the products,
the reaction will be... - CORRECT ANSWER - exergonic
Which term most precisely describes the cellular process of breaking down large molecules into
smaller ones? - CORRECT ANSWER - catabolism
Which of the following is a statement of the first law of thermodynamics? - CORRECT
ANSWER - Energy cannot be created or destroyed
Chemical energy into mechanical energy - CORRECT ANSWER - use of blood sugar as a
source of energy for muscle contraction; important for animal motility
, chemical energy into light energy - CORRECT ANSWER - chemical energy to case flash
of light by firefly; important as mating signal
Solar (light energy) into chemical energy - CORRECT ANSWER - sunlight to synthesize
sugar; entire biosphere depends on this process as its energy link with the sun
chemical energy into electrical energy - CORRECT ANSWER - chemical energy to
generate a potential and deliver an electric shock ; defense mechanism of electric eel
chemical energy into the potential energy of a concentration gradient - CORRECT
ANSWER - chemical energy to pump protons into the stomach and maintain low PH; aid
to digestion of foodstuffs
True or False?: Heterotrophs can convert inorganic carbon into organic carbon. - CORRECT
ANSWER - False
Only autotrophic organisms have the ability to convert inorganic carbon (CO2) into organic
carbon. Heterotrophs must take in organic carbon in order to generate the organic molecules they
need for their growth/development and cell maintenance.
Which of the following is (are) true for anabolic pathways? - CORRECT ANSWER - they
consume energy to build up polymers from monomers
Which is not true of phototrophs? - CORRECT ANSWER - they can not function as
autotrophs
In a given 'system' (e.g. a chemical reaction taking place inside of a cell), the amount of energy
available to do work is called _____________. - CORRECT ANSWER - Free energy
Energy is observed in two basic forms: potential and kinetic. Which of the following correctly
matches these forms with a source of energy? - CORRECT ANSWER - the covalent bonds
of a sugar molecule: potential energy
