Recent content by biophysics

are u saying that a single myofiber (multinucleate) is composed of multiple cells that have fused to form 1 cell (the myofiber) thanks

I know that smooth and cardiac muscle cells (myofibers) are connected to each other by gap junctions. How are skeletal muscle cells connected to each other (to transmit the AP)? Thanks, any responses appreciated

How do these enzymes "read" the template strand and "put in" the complementary nucleotide? Also I've heard that DNA polymerase is less error prone than RNA polymerase. How is this accomplished?

Thanks for the reply, I'm wondering WHY energy or entropy are the most important considerations? Is this a fundamental fact that is taken to be true or is there an even more generalized reason why we always consider energy/entropy thanks

I understand that a chemical reaction is spontaneous if it has a (-) gibbs free energy = if it is endergonic. My question is: Why is energy the ultimate determinant of spontaneity

Is there any fundamental difference between the 3 dimensions of space that we experience. Such as the difference that we intuitively feel between the time and space dimensions

I've learned about memory B and T cells. I'm wondering how many of each a person has for a specific antigen? How long do they live?

thanks, that make sense: The redox reactions of metabolism are exothermic and use some of the heat released to establish a proton gradient while the rest is released as heat. My next question: How can heat (exothermicity) be used to do useful work? I know you said that glycolysis isn't a...

Any ideas will be appreciated My question: I understand how friction produces heat. How does a biological process like cellular respiration produce heat?

thanks for the above responses- In the hydrogen ion example- I understand that a system moves toward equalizing concentrations to maximize entropy, and hence minimize the energy of the sytem. If we apply this principle to ATP/ADP, then should the system not move towards 100% ADP to...

(although this doesn't account for the large negative standard Gibbs Free energy change since the concentration of all reactants and products for the standard Gibbs are the same: 1M Thanks for replying. You say in the above that the reason that concentration disequilibrium does not affect...

thanks for your reply, very interesting I've heard that fermentive cells produce more heat than those cells which use aerobic respiration. I understand that fermentation produces 2ATP/glucose while aerobic respiration produces about 30ATP/glucose. Thus more energy is given off as heat...

thanks for the reply, Lets assume that we have a reaction which releases 0 energy. If we put this reaction in disequilibrium, we will not see any release of energy even as reactions occur to bring the system into equilibrium. Thus: It is only the bond energy that contributes to the energy...

Hi, thanks for the reply Can you give me an example where the energy of a molecule IS due to bond energy and NOT due to an equilibrium imbalance? I believe that a high bond energy is manifested in an equilibrium where ADP is favored. Thus it is the high bond energy which gives ATP/ADP a...

thanks for your response: For the orbit around the sun 1) The Earth has a tangential velocity which is constant. Since there is no acceleration, no force is needed to maintain this tangential velocity. However what brought the Earth to this tangential velocity? Also is the tangential...