Homework Help

Hi every one x I would like a help in the following question please Discuss mRNA translation in humans Your answer should discuss the locations of mRNA translation, the mechanism and regulation of translation including the roles of microRNAs, the mechanism of mRNA degradation and the potential consequence(s) of translation of a mis-sense mutation Waiting u respnces guys thx

I have come across 2 mechanisms of bromination of alkenes. One mechanism (the one in my A-level Chemistry book- University of Cambridge) states that a carbocation is formed, but my undergraduate chemistry course book (from the open university of sri lanka) states that a carbocation is not formed and a differenet mechanism is given, in which a bromonium ion intermediate is formed. This mechanism is acually supported by many websites I visited to; so I'm curious why I was thought a wrong mechanism in the Cambridge A-levels book. First of all, is it a wrong mechanism? Thanks.

Hi Everyone, How do you derive a concentration from a calibration curve ? suppose if you have two sets of absorbance data .... The data i have is Conc mg/L 0 100 500 1000 1500 1750 2000 Absorbance 0 0 0.04 0.05 0.16 0.20 0.40 0.46 0.61 0.60 0.69 0.705 0.86 0.80 I know that the concentration would be on x axis, and absorbance on y and would plot both of each duplicate pair of values, but then how would I derive a concentration from it ?

I do not understand why I am getting this problem wrong on my homework. Rank the compounds in the following group in order of decreasing rate of solvolysis in aqueous acetone. a) 2-methyl-4-chloro-butane b) 2-methyl-3-chloro-butane c) 2-methyl-2-chloro-butane I know acetone is polar aprotic so it favors Sn2 reactions. Therefore, wouldn't it be in the following order: primary > secondary > tertiary or a>b>c? Please correct me if I'm wrong...

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Hello everyone! I'm new here obviously, and I need a ton of help with my science project! My experiment design is due on Monday. I need help because a lot of the information is hard to find on the internet. If you can help me find it too, that'll be great! So my fundamental science project question is: Can tide detergent (or bleach?) remove sharpie from clothes? Why or why not? How? I talked to my chemistry teacher and she wants a lot more information on the chemical analysis/make up of the marker and detergent. She said my experiment is very elementary and doesn't have a lot of chemistry involved to make it more complex. On my first draft, I just put the fact…

Hi all, Can anyone tell me ways/methods to extract DNA from buccal swabs ? I am really stuck at this Thanks

Can u help with this problem? A charged particle of mass 1.50 g is moving at a speed of 1.50 3 104 m/s. Suddenly, a uniform magnetic field of magnitude 0.150 mT in a direction perpendicular to the particle's velocity is turned on and then turned off in a time interval of 1.00 s. During this time interval, the magnitude and direction of the velocity of the particle undergo a negligible change, but the particle moves by a distance of 0.150 m in a direction perpendicular r to the velocity. Find the charge on the particle. I know that qvb=ma The only unknown to get q is a. How to get it ? Also I am confused, of how it is mentioned that change of vel…

Two photons are travelling, one in the east and another in the west. Then the relative velocity between two is (a) 2c (b) c/2 © c^2 (d) c I know the velocity of light is constant, i presume the answer is option (d). But the term relative velocity confuses me. I look forward for revered members' help in this regard

Given the matrix [math] A = \left( \begin{array}{cccc} 2 & 1 & 0 & -1\\ 0 & 2 & -1 & -1\\ 0 & 0 & 3 & 1\\ 0 & 0 & -1 & 1 \end{array}\right) [/math], find its Jordan matrix and the matrix T, for which [math]A=TJT^{-1}[/math]. All four of the eigenvalues are 2, and the Jordan matrix will consist of two Jordan blocks; [math] J = \left( \begin{array}{cccc} 2 & 1 & 0 & 0\\ 0 & 2 & 0 & 0\\ 0 & 0 & 2 & 1\\ 0 & 0 & 0 & 2 \end{array}\right) [/math]. Thus, if we label the eigenvectors [math]h_1[/math], [math]h_2[/math], [math]h_3[/math], [math]h_4[/math], we h…

A ball is thrown upward with a velocity of 39.2 m/s, Four seconds later, a second ball is thrown up with the same velocity. At what height will the two balls meet? [ can someone give me even just an idea on how to solve this ? haaa . im really having a hard time on this one .. thank you ! ]

I have a question that asks me to divide the d orbitals of the metal atom in the trigonal prismatic ML6 complex into their symmetry types. I've answered this part of the question, but I'm not sure I answered the question the problem was asking. Does it just mean look at the character table (D3h) and say: dz2=A1' dx2-y2, dxy= E' etc? Then the question asks to predict the relative energies using CFT. I have dz2>dx2-y2>dxz, dyz>dxy, but I'm not sure that's right...

Q. Given a pair of plaintext P and ciphertext C encrypted under a DES key, in the worst case, how long does an attacker have to try for finding a key K such that C = DES(K, P) which represents the DES encryption of P under key K? Assume that the attacker can perform 10^13 encryptions per second. Give your answer to the nearest hours. Allright so the book(Stallings) says that if the key is 56 bits long, then the total number of Keys is 7.2x10^16 keys. So I assume that this means that the time taken is simply (no. of keys)/(10^13) which means it will take 2 hours to find the key K. Is this correct? If not can you suggest an alternat…

messages arrive at a node in a communication network according to a poisson process with rate lambda. each arriving message is temporarily stored in an infinite- capacity buffer until it can be transmitted. the messages have to be routed over one of two communication lines each with different transmission time. the transmission time over the communication line is i exponentially distributed with mean 1/miu i (i = 1,2), where 1/miu1 < 1/miu2 and miu1+miu2 > lambda. the faster communication line is always available for service, but the slower line will be used only when the number of messages in the buffer exceeds some critical level. each line is only able to handle…

Why is SF5 polar, while PF5 is non polar ?

Could some one tell me what the Physical and Chemical properties of salt are?

-------------------------------------------------------------------------------- Hi, Can someone please tell me if I am doing the right calculation here. So, the question is if had to make 50ml of a 2.0 % agarose gel, how much agarose would I need to weigh out? So I find 2% of 50ml:- 2.0x50ml = 100 g of agarose ? is this correct ? And I need to calculate how much of a 6 X loading buffer I need to add to my PCR sample, but I am not sure how to do that. Can someone please help? Many thanks

I'm struggling majorly with a problem. The directions are to draw all possible isomers for [Ru(bpy)(NH3)2(H2O)Cl]+. I'm struggling with drawing the structure of the compound itself, let alone the isomers. I know bpy is a bidentate ligand, but I'm not sure I'm clear on how that effects the structure. Thanks for any guidance!

What must Ax equal for the equations f(x) = (Ax \cdot x)e^{||x||^{2}} to have a critical point? How would I prove that. Or at least start a proof? Thanks!

I'm curious as to what characteristics of ligands affect CO stretching frequencies. I've already accounted for backbonding, and I'm wondering what other characteristics are important. I'm also a little unclear as to what makes a ligand more pi accepting than another.

Find the area bounded by the graph of f(x)=x3 √(1-x3) the x-axis & the verticle lines x=0 & x=1.

Hi How can I using a 100bp ladder calculate the sizes of PCR products obtained with a 3' primer ? Can someone please help me really stuck on this

I need to find what Ax must equal in order to for (f(x) = (Ax(dot)x)(e^(||x||^2))) to have a critical point. I've gotten it down to Ax = -x(Ax dot x) but I dont think that's right. I'm really not sure.

Hi, i need a concise description and summary of isomerisation and reformation with a couple of examples for both and how they are used for creating fuels. Also, any other ways in which fuels are altered to gain better efficiency or to be 'greener' would be great. Thanks, Drew.

Hi everybody! Question for a take home biochem test that Im not sure how to answer: Receptor-mediated endocytosis is important in processing LDL; however, other peptide hormones also function by this method and may use receptor-mediated endocytosis instead of using a second messenger to transfer their ''signal.'' what could be the reason(s) for the hormone and its receptor to undergo endocytosis? Thank you in advance for any help you can offer me!