Homework Help

Hi, I am not sure how to find the answer to this question, I need to find out the intermediates of glycolysis, starting from glucose-6-phosphate.

How many moles of ATP are required to pump one mole of Ca2+ out of a cell when the cytoplasmic concentration is 0.2 uM, the extracellular concentration is 1.8 mM, and the membrane potential is -55 mV? I know I have to use deltaG= RTln([Ain]/[Aout]) + ZFdeltaPsi but how do I get the number of moles of ATP from deltaG??

I am currently in a genetics college course and we received an extra credit restriction mapping problem that no one seems to really understand how to do, and unfortunately the teacher hasn't been much help. If anyone could explain how to do it, I would greatly appreciate it!! Problem: A piece of DNA 5,000 base pairs long is digested w/ restriction enzymes A and B, singly and together. The DNA fragments produced are separated by DNA electrophoresis and their sizes are calculated with the following results (in base pairs): Digestion with--- A = 2,100, 1,400, 1,000, and 500 B=2,500, 1,300, and 1,200 A&B=1,900, 1,000, 800, 600, 500, 200 Each A fragment is extrac…

Hey there, There is a homework I have been struggling with recently, and after days of fruitless reflection I turn to the pros at scienceforums.net So, here is the quesiotn : I have to establish a set of 2 differential equations relevant to a round object moving inside a bowl. The bowl can be considered as a 2D curve, of equation y=(x1)^2. I have to find 2 differential equations such as (x1)'=x2, and (x2)'=f(...). The function f must be dependent on the previous values of x1 and x2, as well as the weight of the object, the gravitational acceleration and a constant of friction K. I really have no idea how to do this, a push in the right direction would be extremely he…

I have difficulty understanding the Pxy diagram of a binary system (e.g. an ideal benzene-toulene mixture) and some facts in general, have been stuck there for hours, reading notes and everything but never seem to find or understand it. 1) Why is the bubble point line the line that indicates the total pressure of the system (partial pressure of benzene and toulene vapours)? 2) Why is the dew point curve and how do I derive it, because I really have no idea. 3) When I say a liquid is saturated, it means it's in equilibrium with the vapor, or is it 100% liquid. Then this means the vapor is saturated as well? But there is a graph with P against specific volume th…

How is the antioxidant property of ascorbic acid applied in vegetable oil?

Hi can someone please help me to understand these questions? I'm completely stuck. Any help anyone can offer would be very much appreciated! I'm a bit lost, but would probably be OK if someone explained it. Merged post follows: Consecutive posts mergedTo be clear I get (I think) that in the first question that the disease has to be recessive since neither of the parents are affected. In the second question, if the disease is recessive this should give the numbers 1 and 2, 3 and 4, 10 and 11, since these all had offspring who were affected, but they weren't affected themselves. in the 3rd question if I do a punnet square diagram, the genotypes produced…

A myoglobin had the protonation of a histidine residue coupled to the oxidation of a heme. The histidine had a pKA of 6.0 when the heme is oxidized and 7.1 when the heme is reduced. At pH 9.5, the reduction potential of the heme is +275 mV vs NHE. (a) Draw the thermodynamic box that describes this system (b) Predict the reduction potential at pH 3.

Hi everyone, basically, i m writing a report on a practical i did, and a bit confused on how to interpret the results. We used glucose oxidase to determine the glucose in patient samples, glucose is converted in to glucuronic acid, and there is hydrogen peroxide generated as well, and this is reduced to water by another enzyme (horse radish peroxidase) and the oxidising power produced forms a pale purple colour. We added the enzyme in our plasma samples, and they formed this pale purple colour, and then we measured at 575 nm. So does this indicate the presence of glucose in patient samples ?

This isn't exactly a homework question, so it might not be in the right thread, but... We've been learning a lot abut forces and such, as well as momentum and impulse.There were two things I was wondering about. 1) How do you calculate the amount of foce needed to break something? For example, a board. Do we just use F = ma to find out how much force the board has? And if so, does that mean if we strike the board with that same forcve, or more, then it would break? 2) How does force injure a human body? I've never really thought of it before, but the more I think about it, the less I understand. Is it that the bodt is resisting a change in acceleration, and th…

I have circular wire loop (radius 10 cm) that exists in the presence of a growing magnetic field. Thus, an EMF of 5 V is induced in the wire. We are given that the wire resistance is a constant 2 ohms/cm. Two arbitrary points are chosen on the wire, A1 and A2. These points divide the wire into two arcs, L1 and L2, where L1 = 3L2. Now, the question asks: What is the electric potential from A1 to A2 along the longer arc? And along the shorter arc? My book explains clearly that "Electric potential does not have meaning for electric fields produced by induction". So...is this a trick question (which it might very well be, my professor has done so in the past)? Thanks…

Hello. am trying to find out how to determine what the charge of a transitional metal is based on the periodic table, with the end goal of working out a name for the compound formula and quantities of each atom etc. when given a chem compound formula containing a transitional metal and a main group non metal, finding the charge of the non metal is easy. my textbook says that transitional metals have different rules to the main group ones but does not tell me how to get the charge of them. I know it has something to do with the roman numerals along the top, but only keep being referred back to the main group elements. any help with this would be muchly appreciated.

On my science HW, I'm completely stuck on these questions. Some one help please? 1.discuss at least three features of a hominin's post cranial skeleton (does not include skull) which suggest that it was bipedal. Any hints guys? 2.Think about and discuss two non-skeletal clues that early hominins were bipedal, and/or had continuous free use of hands. (HINT:What clues did they leave behind?)

Hi guys, I am not really sure on how to answer these type of questions, i knw there would be a formula/method to calculate them, When the base composition of DNA from 'an organism' was determined, 16% of the bases were found to be adenine- what is the percentage of cytosine? what is the entire % base composition (% of A, T,C, G) of the DNA? any ideas

Hi all, i just need to know if the glucose oxidase/horseradish peroxidise enzyme can be used to determine the glucose level in diffrent samples taken from patients who have had an OGTT. (oral glucose tolerance test) thanks

The answers to these problems are in my book, but I need a little help understanding just how they fit together. The spring is compressed 5 cm from equilibrium, and the projectile travels 15 cm from the compressed point to the opening of the gun barrel. They want the velocity at exit (which I got right), and the MAXIMUM velocity, which apparently occurs just BEFORE, not AT, spring equilibrium or x=0. Variables: kinetic friction = .032 N (constant for length of gun barrel, 15 cm) mass of projectile = 5.30 g = .0053 kg spring constant = 8.00 N/m starting point x = -5.0 cm = -.05 m ending point xf = 10.0 cm = .10 m = (xi + .150 m) I need to find the x-value wh…

For a lab we did on Tuesday, we are required to do a flowchart (in order to assist us in part two of the lab this week). I emailed my lab TA my flowchart, and she told me I had the right idea but should start out with OH- so that I can have all filled up ppt (precipitate) and spn (supernatant) throughout. For some reason, I am having trouble on linking them together. The OH through H+ experiments are all a sequence, but the PO4 and Fe(CN)6 are both independent, so I am unsure how to factor that in. Also, as you can see, the PO4 experiment yields no spn, so that is confusing me as well. Thanks in advance for any assistance. http://s160.photobucket.com/albums/t179/Marco…

I need 3 manipulated variables for my science fair project question. So the question is: Do white candles burn at a different rate than colored candles? So far, I've written down 2 variables.. Time passed and color of candle. I need another.

Is it just that what's inside the square bracket cannot break its bonds but the counter ion on the outside can? I just read about the dissolution of a coordination compound in water, does that mean just the counter ion would react if there were brackets?

Three questions. 1) A skier has just began descending down a 20 degrees slope. Assuming that the coefficient of kinetic friction is 0.10, calculate the acceleration of the skier and the final velocity after 8 sec. We don't have enough information to solve this...or am I missing something? 2) A traffic light with a mass of 30kg is hung in equilibrium by 2 wires, one at an angle of 45 degrees, the other at an angle of 37 degrees. Find the tension in the two wires. 3) One bucket weighing 25N is hanging by a massless cord from another 25N bucket, which in turn is hanging from a third 25N bucket. All three are being lowered with an acceleration of 1.5m/s^2. Cal…

Does anyone know how to determine the hydrated ion that affects the pH of a solution? Ex. NaCl solution, NaCH3CO2 solution, ect. I think it would be the Cl- ion in a solution of NaCl, but not so sure... Merged post follows: Consecutive posts mergedDoes anyone know?.... : -)

Nevermind! All set!

What is the Maximum work done by a nickel-cadmium cell under standard conditions as 1 mol of Cd is used up and if the emf of the cell is 1.4V?

Can someone tell me if I am writing this equation right? I am trying to show the ion that is reacting in the solution. The solution: Al2(SO4)3 Equation: Al^+3 + H2O <----> Al(OH)^+2 + H^+

What is the balanced equation for NaH2PO4 + H2O? Is it NaH2PO4 + H2O ----> PO4^3- + H3O^+ + 2Na^+ ?