Q

Why do hox genes prefer posterior vs anterior. SIMPLE easy to understand explanation within a paragraph. Thanks!

So my book says, Eion= 2.303(RT/zF)log([ion]o/[ion]i)

It says at body temperature at 37 degrees Celsius, K+ simplifies to:

Ek= (61.54mV)log([ion]o/[ion]i)

What are the in between steps?

It says T & F are constants, so I crossed them out.

Then its says the temperature is 37 and I multiplied that by 2.303 and divided by 1 because the charge on K is +1.

I got 85.211 mV?

My work: (((2.303)(37))/1= 85.211 mV

It says T= absolute temperature?

so do I have to convert the 37 degrees Celsius or something?

confused.

CF3+ how would you draw the lewis dot diagram for that? Wouldn't the formal charge for C be 4+7+7+7=25

25-1=24e-

I thought that Carbon had to have 4 bonds around it always? My teacher drew it with 3 bonds?

C with 3 F's around it and only single bonds on each C-F. Shouldn't it have 4 bonds? so a double bond on one of the F's? then the formal charge for C 4-(4-0)=0 but then thats not right..ahhh so confused

Choose the correct order of the increasing bond polarity.

H-F>H-Cl>H-Br>H-I

H-F<H-Cl<H-Br<H-I

H-F>H-Cl<H-Br<H-I

H-F>H-Cl>H-Br<H-I

I think it's the first one?

1. Calculate how much 95% ethyl alcohol will be required to dissolve 0.3g of sulfanilamide at 78*C.

2. Using the volume from step 1, calculate how much sulfanilamide will remain dissolved in the mother liquor after the mixture is cooled to 0*C.

There are no examples in my lab book or suggested equations for us to use. Could someone show & explain the work to me.

A sick child may have influenza or RSV. These virus infections have different treatment options, so the physician requests antibody titer tests. The results are as follows: anti-influenza antibodies are primarily IgM, and anti-RSV antibodies are all IgA and IgG. Which of the following is the most appropriate interpretation?

the child has a current RSV infection and was previously exposed to influenza.

the results do not provide sufficient data to draw a conclusion.

the child currently has influenza and has previously been exposed to RSV.

the child has concurrent influenza and RSV infections.

the child has neither influenza nor RSV.

Which of the following classes of antibody is most likely to be made by the oldest plasma cell in a population of B cells?

how do i convert 0.02568 to base log 10?

the answer is suppose to be .0591

its to get the final form of nernst equation for chemistry but idk how to type it into my calc

What are the advantages and disadvantages of using organic and biodegradable antagonism?

does the concentration of lysol play a role in inhibiting microbial growth?

Control of pH is a method of food preservation, used in primarily pickling. Explain why.

A question in my lab but I have no idea? Kind of confused. I know certain organisms can grow only at a certain pH. is that the answer? To prevent contamination to the pickles?

why is it important to optimize microbial growth in a lab setting?

Control of pH is a method of food preservation, used in primarily pickling. Explain why.

A question in my lab but I have no idea? Kind of confused. I know certain organisms can grow only at a certain pH. is that the answer? To prevent contamination to the pickles?

why is it important to optimize microbial growth in a lab setting?

Can you tell me which ones are sporocidal ? My book doesn't say.

a. Phenol and phenolics: bisphenolics, triclosan

b. Alcohols:: isoopropanol and ethanol

c. Halogens: iodine, chlorine, bromine and flourine

d. Oxidizing agents: hydrogen peroxide, ozone, and peracetic acid

e. Surfactants: quaternary ammonium detergents, soaps

f. Heavy Metals: mercury, silver and copper

g. Aldehydes:: Glutaraldehyde, formaldehyde

h. Gaseous agents: chlorine dioxide gas, ethylene oxide gas

i. Enzymes: lysozyme, prionzyme

1. Calculate the pH change that occurs when 1.0mL of 1.0M HCl is added to :

a. 1.0 L of pure water and

b. 1.0 L of acetic acid/sodium acetate buffer with [CH3CO2H] = 0.70M and [CH3CO2-] = 0.60M.

How do i do this please show work i am confused.

What is the pH of a buffer containing 1.32 mols NH3 and .0729 mol NH4 in 1.00L? I got 4.99 and my teacher has 9.51 in the answers section. What did I do wrong?

I did: pH=4.74+log(1.32/.729)

What are the 6 tRNA anticodons for leucine? how do i figure it out? and whats the answer?

Fired from my job but haven't received my last pay check? I live in IL.

I got fired from my job 2 days before I was suppose to receive my paycheck for the prior 2 weeks of work. They said they would mail me it. We were suppose to be paid Monday but now it's Saturday & I still haven't received my check. Wouldn't it only take three days to send at max, and if not why should I have to wait for my check instead of just picking it up when I usually do?

I got fired from my job 2 days before I was suppose to receive my paycheck for the prior 2 weeks of work. They said they would mail me it. We were suppose to be paid Monday but now it's Saturday & I still haven't received my check. Wouldn't it only take three days to send at max, and if not why should I have to wait for my check instead of just picking it up when I usually do?