______________ is life's primary source of energy.
Which of the following is not correct?
a. Energy cannot be created or destroyed
b. Energy cannot change from one form to another
c. Energy tends to disperse spontaneously
If we liken a reaction an an energy hill, then a reaction that _____________ is an uphill run.
a. require energy
b. releases energy
c. runs from reactants to products
d. uses an ezyme and a cofactor
In an energy-requiring reaction, activation energy is a bit like ______________.
a. a burst of speed
b. coasting downhill
c. a bump at the top of the hill
d. putting on the brakes
____________are always changed by participating in a reaction.
An environmental factor that directly influences enzyme function is _________________.
A metabolic pathway __________________.
a. may build or break down molecules
b. generates heat
c. can include an electron transfer chain
d. all of the above.
Which of the following statements is not correct?
a. Some metabolic pathways are cyclic.
b. Glucose can diffuse directly through a lipid bilayer
c. Feedback inhibition controls some metabolic pathways
d. All coenzymes are cofactors
e. Osmosis is a case of diffusion
Ions or molecules tend to diffuse from a region where they are _____________ (more/less) concentrated to another where they are ____________ (more/less) concentrated.
____________ cannot diffuse directly across a lipid bilayer.
d. all of the above
) If you immerse a human red blood cell in a hypotonic solution, water will ____________.
a. diffuse into the cell
b. diffuse out of the cell
c. show no net movement
d. move in by endocytosis
Fluid pressure against a wall or cell membrane is called _____________.
A transport protein requires ATP to pump sodium ions across a membrane. This is a case of this type of transport.
Vesicles are part of ____________.
d. a and c
This enters a reaction
one cell eats another
the rule that no energy cannot be created or destroyed
first law of thermodynamics
This forms at reactions end.
This assists enzymes
basis of diffusion.
no energy required for this transport
Requires energy input for this transport
currency in a cell's energy economy
this goes in circles
A phospate-group transfer