Homework Help

Greetings and salutations! I am absolutely worried that the following assignments are wrong in some way. Could you guys help me out, on this one my teacher at school isnt very responsive to these kind of things... MY anaswers seem ok but i dont know... BTW Why do we exhale 12 times a minute im still quite unsure Glycolysis 1. In one sentence, what occurs to the glucose molecule during glycolysis? Glycolysis is the splitting of sugar (glucose). 2. Why is glycolysis divided into two phases? Glycolysis is divided into 2 major phases: Energy Investment and Energy Production. In Energy investment 2 ATP molecules are used up, and in Energy Production 4 …

i have been told to identify all functinoal groups of two compounds. A: B: CH3-C=CH-CH2-OH + CH3-CH2-C=O | | CH3 OH am i correct in saying compound A contains two functional groups, Alkene (the C=C double bond) and alcohol (the OH on the end) and B is a carboxylic acid? Merged post follows: Consecutive posts mergedthe formula didnt come out to well.... The OH should be with compound B on the end with the C=O double bond.

Hi all I seem to have a recurring problem with this type of calculation: We have to calculate the increase in percentage in the mass of carbon in the atmosphere if we were to move 1ppm of the rock reservoir to the atmosphere (without compensating transfer of carbon out of the atmosphere) The data is Mass of carbon/10¹²kgC for rock is 50,000,000 x 10¹² KgC and in the atmosphere is 800 x10¹²kgC. The calculations given by the book is as follows: 1ppm: is 1 x10⁶( elevated at six) so divide 50,000,000 x 10¹²/1 x10⁶= 50 x 10¹² 50 x 10¹²/ 800 x 10¹²x100%=6.3% Sorry I know this is too basic but I don't get the first part of the calculation. I have the …

I was doing a question for my lab and I looked up the properites of salicyclic acid. I found out that it is polar...but it does not dissolve as readily in water as it does in ether. I'm confused because I thought a solute that dissolves in ether solution is considered non-polar. Can anyone explain why this is the case? Thanks soo muchh!!!!!

The relation between standard free energy and biologically standard free energy is given by: (delta)G|biological = (delta)G|standard +RTln(10^-7) where under biological condition the pH is 7 instead of 0 (1M H3O+). I know the free energy is given by: (delta)G = (delta)H - T(delta)S = (delta)H - T(delta)S|non-mixing -T(delta)S|mixing = (delta)H - T(delta)S|non-mixing +RTln(Q) = (delta)G|standard + RTln(Q) But how can I derive the term RTln(10^-7)? I think if my biochemical equation does not have a hydroxide or a hydronium on either sides should have its free energy pH independent... Where did it go wrong? Hope someone to point out...

I'm doing a project for school and I need to catch the egg using limited materials from 1m, 2m, and 5m. The materials I'm allowed are: 6 pieces of paper of normal paper 100 cm of masking tape. NO OTHER MATERIALS! The 'catcher' has to stand on its own (on the ground) and the egg isn't allowed to be subjected to modification.

Hello to everybody I have to apologize in advance, becouse I'm not a native english speaker, so errors in my post may occur I hope someone will be able to help me with my problem. Me and my friend are studying abroad and within the exchange programme we choose the subject Concrete structures. The host university didn't provide us lectures in english, so we agreed with the responsible proffessor to give us some english material. For our ''homework'' (seminary work) we agreed that we have to do one example of calculation for beam design (only for bending moment) and one example for column design (only buckling). Sounds very easy, but...we are new in this fi…

Any one with experience separating ethanol from beer using vegetable oil to discard water followed by distillation of oil-ethanol solution?

Im a information science student, so i really have no backroung knowledge in compter science. I understand the basic process behind digital signatures but thats as far as it goes. I have a presentation to give on friday. Ill copy and paste it here. If you can help, please do. Im at wits end. I dont know what any the symbols mean. The Digital Signature Standard is computed using the following equations: r = (gk mod p) (mod q) s = (h(M) − xr)/k (mod q) Describe what the various symbols represent. (b) Write down and explain the equation(s) used to verify a signature. © The standard specifies that r must lie strictly between 0 and q. What might go wr…

Hi, I am not a student but felt this question was at such a basic level it could go here I understand the concept of radioactive decay and obtaining a ratio of parent to decay product. I feel I am missing something very basic though. Lets say you are using Uranium-Lead to measure an age. Is all the lead in the sample assumed to be decay product ? I suppose this is what I get for trying to learn this stuff off the internets

Chemical analysis of the DNA of a virus from Mars reveals that it has 48% G, 48% C and 4% A. Suggest some possible structures for this DNA? I dont understand this problem, can someone please guide me in the direction and ill try to figure it out and post the answer later to see if im correct

y = x^2 - abs(x-4) at x = 4 how do i tell if it has a discontinuity, cusp, vertical tangent or corner using algebra im soooo lost.

Plaque assay is performed beggining with a 10 mL phage solution. The solution is serially diluted 4 times by taking 1 mL and adding it to 9 mL. 0.1 mL of the final dilution is plated & yields 21 plaques. What is the initial density of the starting phage solution? So here's what I know. Density= (# of colonies formed/ mL plated) x Dilutionbefore plating # of colonies formed is 21. Now I'm assuming the mL plated is 0.1 mL? And as for the the dilution I am stuck. Is there a way I can figure out how to calculate that?

That doesn't make sense at all, they're opposite :S

the Constant Spring allele of the alpha-globin A2 gene produces a protein that is 172 aa's long rather than the normal 141. The first 4 amino acids match normal alpha-globin, but aa#142 in Hb-Constant Spring is glutamic acid. What is a possible hypothesis to explain the mutation that created Hb-Constant Spring? What is going on in the DNA in transcription and translation?

Hi there, Does anyone know how I can rearrange the GHK equation, then using simple algebra (i.e. simulatenous equations) find the values of [math]\alpha[/math] and [math]\beta[/math] as well as internal concentrations for Na, K and Cl. I have the membrane voltage mV and the external concentration of all three ions. Thanks

Hey everyone, I was going through some past exam papers and this question came up and I am as the title says stuck. here goes the problem; what states of hydrogen atom have an ionisation energy of 5.448 x 10^(-19) J? This question requires students to do some mathematical calculations. I was wondering if can I use the formulea [math] Enx-Eny = hcR (\frac{1}{nx^2} - \frac {1}{ny^2}) [/math] and then apply [math] En = - \frac {hcR}{n^2}[/math] (where R is the rydberg constant) to get n and work out the quantum numbers from there? any help most appreciated. thanks

I am at a stand still with what to do for my lab. Below is the information that I have been given as well as a Histology report. For my first day in lab i need to decide what tests i should run to determine what kind of molecules is building up. ie. Protein, Nucleic acid, lipid, carb... etc What would your suggest for test to determine what kind of compound i have. I do have access to the crude material. Thanks! Histology: Kidney, bone marrow, liver. All were stained with H and E then washed with ethanol. Where the build ups were located are now holes. So the ethanol must have destroyed the compound that is building up. A 6 month old who was recently seen at the …

Here's the question: If chromatin is digested with an endonuclease to produce 200-bp fragments, and these fragments are then used to transcription experiments, very little RNA is made. Provide an explanation for this observation. I am not sure what they are looking for here. It seems that less RNA would be made because RNA is complementary to DNA and if the DNA is shorter then naturally the RNA would also be. But I am not sure what else could be the cause.

I've the answer understood, but I don't understand why the word "immunological" is being used. Does this have to do with antibody bonding, which would allow usage of the term "immunological"? If so, doesn't that seem biased, because other binding agents could be used? My answer: possible amino acid change in the enzyme; however, the enzymes are similar enough that the binding agent binds to the enzyme in question during the western blot.

The question I'm working on reads: I assumed that the Kp would not change, because the mole ratio was not changed. But the back of the book tells me otherwise. The answer is supposed to be Kp = 3.42. Can someone please explain how to get that answer?

How many liters of antifreeze ethylene glycol (C2H6O2, density 1.11 g/ml) would you add to a car radiator containing 6.5L of water if the coldest winter temperature in your area is -20C? So I figured I can use the freezing point depression equation to figure out what the molality of the resulting solution must be if the freezing point of water is depressed 20 degrees C. I got 10.75m. Now I don't know how to figure out how much of the solution to add to the 6.5L of water to make it this molality. Some sort of ratio? I'm lost.

Book problem: My solution: I was thinking that the base pair has to be either A-T or C-G. Thus, two pairs are possible. (1 of 2 possible) x (1 of 2 possible) ... 8 more times... = 2^10 = (1 of 2 possible: A-T or C-G)^10 Book solution: But I'm guessing the book has it as 4^10. My question: What am I not seeing?

Hi! I am a Life sciences student and have my exam tomorrow. Actually I have read the chapter linkage, crossing over and recombination and have good knowledge of it. But the main problem is that I don't know what actually to write if I am asked about to write a short note on linkage worth 5 marks. Linkage is a very huge topic so I can write around 2-3 pages easily but it would be too long for a 5 marks question. I would be glad if you can show me what to write if I am asked to write on 1. linkage 2. Recombination 3. Crossing over (5 marks each topic) waiting for answer as soon as possible.. I have my exam tomorrow.. Thanks

i heard that estrogen and progesterone virutally prevent other hormones, lh / gnrh, etc.. from being produced. i don't see the benefits, why is this so needed