Biology 2015

The fact that energy transformations increase the amount of entropy is the basis of which of the following?
a. cell theory
b. first law of thermodynamics
c. second law of thermodynamics
d. oxidation-reduction reactions

The energy stored in the carbon-carbon bonds of glucose is an example of _____ energy.
a. kinetic
b. potential
c. chemical
d. mechanical
e. Both b and c are correct

During energy transformations, the majority of energy is converted to
a. chemical bonds.
b. heat.
c. ATP.
d. glucose molecules

Exergonic reactions
a. are spontaneous.
b. have a negative delta G value.
c. release energy.
d. All of these are correct.

Which of the following is incorrect regarding ATP?
a. It is the energy currency of the cell.
b. It is stable.
c. It is recycled using ADP and inorganic phosphate.
d. Cells keep only small amounts of ATP on hand.

The sum of all the chemical reactions in a cell is called
a. free energy.
b. entropy.
c. metabolism.
d. oxidation-reduction reactions.

Which of the following is incorrect regarding the active site of an enzyme?
a. is unique to that enzyme
b. is the part of the enzyme where its substrate can fit
c. can be used over and over again
d. is not affected by environmental factors, such as pH and temperature

Which of the following environmental conditions may have an influence on enzyme activity?
a. substrate concentration
b. temperature
c. pH
d. All of these are correct.

In which of the following does an inhibitor bind to an allosteric site on an enzyme?
a. competitive inhibition
b. noncompetitive inhibition
c. redox reactions
d. None of the above are correct.

Enzymes catalyze chemical reactions by which of the following?
a. lowering the energy of activation in the reaction
b. raising the energy of activation in the reaction
c. increasing entropy
d. increasing the free energy of the products

The gain of electrons by a molecule is called
a. inhibition.
b. entropy.
c. oxidation.
d. reduction.

In which of the following processes is carbon dioxide reduced to form carbohydrate?
a. cellular respiration
b. noncompetitive inhibition
c. photosynthesis
d. induced fit model