Which statement about receptors and enzymes is true?
Which of the following does photosynthesis and respiration have in common?
ATP synthesis in both processes relies on the chemiosmotic mechanism
Which statement about receptors and enzymes is true?
Both receptors and enzymes may be integral membrane proteins
Which molecule would diffuse across a phospholipid bilayer fastest, if there are no proteins associatedwith the bilayer?
CO2
Which statement about DNA and RNA is true?
DNA contains deoxyribose and RNA contains ribose.
Which statement about enzymes is false
Enzymes can convert an endergonic to an exergonic reaction.
Which step of the signal transduction cascade that results in glucose release during the "fight-or-flight" response involves factors other than a nucleotide
Epinephrine binding to its receptors
How is an environmental signal similar to a cell-to-cell signal?
It causes a change in the three-dimensional structure of a receptor
Which statement about ATP is true?
It is an energy-storage compound. It is the cell's principal compound for energy transfers It stands for adenosine triphosphate It is the molecule all living cells rely on to do chemical work.
The drug 2,4-dinitrophenol (DNP) destroys the proton gradient across the inner mitochondrialmembrane. What would be the effect of incubating isolated mitochondria in a solution of DNP?
No ATP would be made.
Which of the following is a net result of glycolysis followed by fermentation?
Synthesis of ATP
Which of the followings are two amino acids with polar but uncharged side chains
asparagine, serine
If a cell needed to increase its surface area without changing its volume in order to carry out cellularprocesses more efficiently, it could do this most effectively
by creating deep invaginations in the cell membrane
Chlorine (Cl) has an atomic number of 17. When it bonds with another element, it will likely
gain one electron from the other element
The electric signal for a contraction passes rapidly from one heart muscle cell to the next by way of
gap junctions
Ice is used to cool beverages primarily because
it absorbs a lot of heat when it melts because of hydrogen bonding
Which of the following components is used to assemble intermediate filaments
keratin
The ribosome is a complex that is made up of
proteins,. nucleic acids
f aquaporins are injected into the membranes of epithelial cells that line blood vessels
the membranes will become more permeable to water
