Homework Help

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Hey guys, I'm a new member - In my first year of biomedical science. My Biochemistry module consists of 50% examination (human metabolism) And 50% consists of practical write ups. I'm confused about one graph that is required, the practical in question consists of "estimation of reducing carbohydrates" and "enzymatic and acid hydrolysis of glycogen" Values aside.. I need to plot the following graph on the latest version of excel: Standard curve of concentration and absorbance - done this with no problems. On the SAME graph, I must also plot: Absorbance against time, Glucose equivalents against time, %Hydrolysis against time. Anyone have any id…

Another question i need a bit of help on. The Total length of Calf Thymus DNA is several million base pairs long, how is this reflected in your experimental observations? ok so i have a photograph of the gel i made. and i can see straight long lines of DNA.

Consider the case of a disk of radius a, carrying a surface charge density σ that varies linearly with the distance from the centre of the disk. If the disk rotates about its symmetry axis with an angular velocity of ω, calculate the magnetic field B a distance z above the midpoint of the disk. What is the electric field at the same point? so what I did was I said digma= cr c=constant and v=omega r so surface current I=sigma v = c omega r^2 now using amperian loop we have int (B.dl) = mu I(enc) i used an amparian loop with one vertical side corssing the centre with width of r and height of z above the disk (and below, and we have two vertical parts) so …

Hi, I would really appreciate someone helping me out with this problem or at least showing me how to go about calculating it. Thank you! ---------------------------------------------------------------------------------- Q) Suppose there is a gene with two alleles D and d in Hardy-Weinberg Equilibrium. Further suppose the d allele has a frequency of 0.4 and causes trait Y in a recessive fashion. a) What is the prevalence of individuals without trait Y? b) What is the probability that two individuals with trait Y will mate (given the assumptions of Hardy-Weinberg equilibrium hold)? c) What is the probability that an offspring of the above mating will not h…

Hi everyone, ok this is my first thread on here. I am having problems with one of the questions, if anyone could give me some advice/hint on it. A DNA molecule is 48000 base pairs long. it is cut by a restriction enzyme (Hind III) into 8 basepairs, i m supposed to see 8 bands on the gel photograph but can only see 6. Ok, my teacher said this is because we used ethiduim bromide as a stain, but i dont understand how bromide is related to any of this, i have searched properties of bromide on the net but cant find anything related i would be grateful if anyone could help

Hi, i have another question which i need help with. Bacteriophage DNA is 48000 base pairs long. Hae III cuts it into 206 peices. Hind III cuts it in 7 places, whilst another 6-cutter Pst I cuts it into 28 peices. Why the diffrence? I am thinking is this because they are specific ? as in 6-cutter, 4-cutter etc? or is it something to do with DNA sequences?

What is the magnitude of the acceleration that the force will cause when applied to a car with a mass of 1.1x10³Kg Then calculate the final speed of the car (above) assuming that it was standing still initially and that the force of 5.0 x 10³ N is applied for 6.0s Why would the car take longer to reach the calculated speed if the car's mass was 1.4 x10³Kg. which part of newtons second law would explain this. THANKS. xxx -

The questions asks to use mathematical induction to prove the truth of the follow for [math] n \geq 1 [/math] [math] a^n - b^n [/math] is divisible by [math] a - b [/math] for any integers a,b with [math] a-b \neq 0 [/math] Proof Attempt: [math] n = 1[/math] [math] a^n - b^n = a - b [/math] [math]\frac{a - b}{a - b} = 1 [/math] Now suppose that [math] n = k [/math] and the statement is true for [math] n = k [/math] We must show that the statement is true for [math]n = k + 1[/math] I tried using long division as it was suggested as a hint to consider the remainder: [math] a^{k+1} - b^{k+1}[/math] divided by [math] a - b [/math] …

Having problems with solving a few of these questions and some help which would be much appreciated. 1. A speed skater reduces her velocity from 12m/sec to 6m/sec in 5 seconds. Find: a) acceleration b) velocity at the end of the third second c) average velocity d) distance covered during the 5th second period I found acceleration to be -1.2m/s^2 but I'm having trouble finding the distance traveled to work out velocity and the rest from there... 2. A sprinter covers the first 10 meters of a 100m dash in 2 seconds and the second 10 meters in 1.5 seconds. Find: a) average velocities over the 0-10m and the 10-20m segments of the race. ok so 0-10m…

Why does it take longer to orbit the sun the further a planet is form the sun??? Does pluto travel at a slower pace than Earth, if yes why?? Does the further you are from gravity (the sun) mean the slower you travel? if yes why?? thanks BTW i am in high school so please don't give me an information OVERLOAD!! Although i would like detail!!! HW VERY URGENT!! Thanks!

Hi there, a few weeks ago I did a chemistry experiment on back titration. However, I misplaced the worksheet given to me with questions on the practical work we did, hence left it til the last minute. Now I've found it and I'm having trouble with some of the questions. On top of that my chemistry teacher says he will fail me if I don't hand this by next lesson. Below are the intructions to the experiment that we did and the relevant questions given. I think it's a pretty common experiment so many people here would probably be familiar with it (or have done a similar experiment). If anyone could help me out just this once that would be appreciated. And I'm not asking for s…

I am doing a Mathematical Induction out of the book with solution. I don't see how the LHS is equal to the RHS. [math] 1^2+2^2+3^2+...+(k+1)^2 = (1^2+2^2+3^2+...+k^2)+(k+1)^2 [/math] Expanding [math] (k+1)^2 = k^2 + 2k +1 [/math] What am I missing?

[math]\sqrt{8+2\sqrt{7}}[/math]+[math]\sqrt{8-2\sqrt{7}}[/math]

makes absolutely zero sense to me how a misfolded protein without any instruction from nucleic acid can infect cells. can someone help?

Hi everyone, I need help understanding what this question is asking: How is access to medical care important from an ecological perspective of childhood psychopathology? I could answer "how is access to medical care important" but then I get lost when I see the rest. I have no idea what the ecological perspective of childhood psychopathology even is. I don't know what the ecological perspective is but I'm guessing it has to do with one's environment. I believe that psychopathology has to do with mental and behavioral disorders but when I put it all together, it still confuses me. Can someone please explain it to me? Thanks in advance for any helpful replies.

I am having trouble determining what NaClo + Na2S2O3 create in a balanced equation. What gets canceled out, if anything?

I was recently laid off and can no longer afford the $50 an hour tutor for my Son with ADD in his Science Foundations class, and am now going to be trying to help him myself. I don't have much time to finish this stuff however since I'm now working a lower paying job longer hours, etc. I've attached what I need to help him where here on the Forum, and I will PayPal you $20 if you can finish this by this weekend! I'm sure some of you folks would actually enjoy this!! Just send me a private message and I will respond promptly... Thank you and have a great weekend everyone, Robert Holloway Bakersfield, CA Study Guide 2.doc

Hi Guys! I'm busy compiling a report on the effects of gravity and part of my assignment is to state: how you can use the value of "g" (gravitational force) as a tool to determine where a person is on earth. I have already spoken about central fugal forces etc, I just need to know how you can use "g" to determine your position

In certain salamanders, the sex of a genetic female can be altered, making her into a functional male; these salamanders are called sex-reversed males. When a sex-reversed male is mated with a normal female, approximately 2/3 of the offspring are female and 1/3 are male. How is sex determined in these salamanders? Explain the results of this cross.

Hi, can anyone please give me some clues on what types of cell transport mechanisms I should be looking out for when thinking about Neurons and white blood cells? Any explanation of these would be much appreciated.

What makes sugar cane juice ferment well most times but sometimes goes slimy when fermenting using wild yeast(self fermentation)?

Just three questions that I want to clarify about the meanings for. Q1: A northern wind (blowing north to south) is blowing at 70m/s. If a jet is flying at 280m/s and the pilot wanted to fly due west, what heading should the plane take? What is the new groundspeed for the plane? Ok, so I Just want to check: this question is asking for what angle the plane should be flying at (somewhere in the NW direction) so that, with the northern wind, it would be going exactly west? And then I find the ground speed too, yes? Q2: Mr. Smith throws a bar at with a speed of 30m/s at an angle from the horizontal that gives maximum range. His student is sitting on a desk loca…

Which one of the following is an example of two sets S and T of strings such that S ⊄ T and T ⊄ S, but S* = T*? 1. S = {a, b, abb, bba} and T = {a, b, bba} 2. S = {a, aaaa} and T = {a, aaa, aaaa} 3. S = {a, ab, aab} and T = {a, ab, abab} 4. S = {a, b, aaa} and T = {a, bbb} 5. S = {bb, bbbb} and T = {b} I have excluded answers 1,2,5 but I am stuck with 3 and 4. When is S* equal to T*?

Hi, im currently in grade 12, and have received an extended experimental investigation, and can't think of any experiments to do, can someone help me by suggesting some ideas? Thanks, Jackson