With biology answer
question 2
substance a is converted to substance b in a metabolic reaction. which statement best describes the role of an enzyme during this reaction?

a
it adjusts the ph of the reaction medium.

b
it provides energy to carry out the reaction.

c
it speeds up the reaction without being consumed.

question 3
a scientist observes that when the ph of the environment is changed, the reaction rate of an enzyme greatly decreases.

which statement best describes how a change in ph can affect an enzyme?

a
a ph change can cause the enzyme to change its shape.

b
a ph change can remove energy necessary to activate an enzyme.

c
a ph change can add new molecules to the structure of the enzyme.

which term describes reactions that involve the absorption of energy?

a
catabolic

b
endergonic

c
exergonic
question 6
organic compounds contain bonds between what types of atoms?
a
oxygen

b
carbon

c
hydrogen
the reaction shown below is known as what type of reaction?
reactants -> products + heat
a
activation

b
enzymes

c
exothermic
question 9
what happens when an enzyme is exposed to a temperature that is too high?

a
the enzyme becomes denatured.

b
the enzyme functions normally.

c
the substrates can bind to the active site faster.

question 10
a catalyst is a substance that does what?

a
it speeds up a chemical reaction, but is consumed in the process.

b
it slows down a chemical reaction, without being consumed in the process.

c
it speeds up a chemical reaction, without being consumed in the process.

question 11
what is the energy required to get a reaction started called?

a
activation energy

b
adhesion energy

c
chemical energy