Homework Help

here is my proposed experimental count how many drops of water a penny holds on the heads side repeat with soap water solution repeat 20 times plot assume that the drops are the same size is this a good experiment?

Nevermind! It all just hit me.

i have to fill in the blanks for the following questions using the following choices (some will be used once, others more than once, and others not at all) : z-dna, cruciform structure, mirror repeat, hairpin structure, g-tetraplex, triplex dna, hoogsteen pairs, a-dna, duplex dna, inverted repeat. 1. A(n) ____ does not have complementary sequence on the same strand. 2. a(n) _________ is self-complementary. 3. a sequence, such as a palindrome, that can be rotated 180 degrees horizontally and 180 vertically in order to superimpose a sequence repeat on the other sequence is a(n):__________ 4. a four-stranded, right-handed helix formed by a dna segment contain…

I conducted a simple titration experiment and i need to write how and why are the results reproducible can some one hlp me in answering this. Thankyou.

which apply to dna, which to rna, which to both and, which to neither. are my answers correct? 1. contains sugar 3'- deoxyribose--> neither 2. containes sugar 2'-deoxyribose--> dna 3. secondary structure is primarily a double helix--> dna 4. sometimes contains the nucleoside pseudouridine--> rna 5. contains the purine guanine--> both 6. sugars are connected with a 3'-5'phosphodiether link--> neither b/c its a phosphodiester not ether 7. in base composition, %A=%T --> DNA 8. bases are attached to sugars in a beta-glycosidic linkage. --> both 9. sometimes shows hydrogen bonding between a sugar hydroxyl and a base--> both 10. contain…

This the graph please see attachment graph.doc

Hi there, My question is relating to an advanced level text book question. 'Stars a and b have the same density, and star a is 27 times more massive than star b. Calculate the ratio of the gravitational field strenght on star a to that on star b' I hope you would be able to explain how you came to the answer, please.

I'm new here and I need some help with the stats/graphing aspect of my college level-environmental science homework, and since I've browsed this forum more then a few times I thought that some of the good folks here could help me! As the homework which deals with graphing ocean currents, first begins with a series of buoy coordinates in which there are 8 box sets of that contain anywhere from 5 at the least to over 20 at the most. The graphing map it's self which is of the Northern Pacific Ocean, has a longitude range running vertically in the middle of the map running from 20 to 60, and a latitude range at the very bottom running from 140 to -120. In addition the…

So here's a grade 11 physics question my teacher showed to the class with us. John is studying on a cliff 250m high. He throws a rock HORIZONTALLY with an initial velocity of 12.0 m/s (from his height). a) How long did it take the rock to hit the ground below? My teacher showed us on the board: D = V + 1/2 a (t)(squared) then he went on to plugging the numbers into the equation: 250 = 0 + 1/2 (9.8) (t)2 then he got: 7.1s = t I'm confused on how he got 7.1s? Anyone know what he did? I'm worried because there is a homework question similar to what he did. But it has a horizontal component to it, and not a vertical. A bullet is shot h…

;)Hi there! I am doing a coursework on the practical 'kinetics of the reaction between iodine and propanone in acid solution' however I cannot find anything on the internet stating the litrature value for the order of reaction for Iodine, please would you advise me what to type to get this value.Could you leave the address of where you found it. Also, the graph obtained by plotting the 'titres of E' against time is looks a like it could be a curve or a straight line. How do I decide which one is correct? Thirdly, does this graph I have plotted represent the order of reaction for Iodine, OR must I change the graph in order to find the order out. Thankyou

Explain the purpose of an enzyme. Enzymes can function in two different locations with respect to the cell. What are the two types or two locations? Which type is amylase?

The problem with online learning is they give you nothing to work with except questions. I did absolutely nothing on this topic so some help would be nice. Design a laboratory set-up that would enable you to separate a mixture of three hydrocarbons with different boiling points. Explain the reasons for the apparatus you would need in your set-up, and develop the procedure you will use to separate the hydrocarbons. You should also include a blank data table for recording results. (Note: You are not going to perform the actual experiment, so do no report any results)

If an individual has 10 gene pairs, how many different types of gametes can be formed if five of the gene pairs are homozygous and the remaining 5 gene pairs are heterozygous? 42 109 32 1024 None of the above.... Thanks!

I don't know if my answers are correct or not; are they detail enough? Can anyone take a look at them and give me some feedback? Especially questions 7 and 8. Thanks! 1) Is the conversion of 2-phosphoglycerate to phosphoenolpyruvate a redox reaction? Ans: No, because there is no transfer of electrons. 2) Explain how fructose catabolism may lead to an overproduction of pyruvate relative to glucose metabolism in the liver. Ans: PFK-1 is the major control step in glycolysis where many factors in glucose metabolism would regulate this step, but fructose could bypass PFK-1 to produce pyruvate. 3) Illustrate how increased intracellular [cAMP] affects the activity …

1. Benzylamine is a chemical used as a precursor in the synthesis of some drugs. The amino group in benzylamine has a pKa of 9.3. The other groups in this molecule can be considered not ionizable. Structure 1 The picture above shows the unprotonated form of the benzylamine. Draw the protonated state of this compound. Structure 2 * Suppose to be a NH3 Which structure (or structures) will predominated at the following pHs? (Structure 1 is the original picture (unprotonated) and structure 2 is the one you drew (protonated). pH 3: ______Structure 2____________________________ pH 7 – 8…

"John is 1.5m tall and throws an orange at a velocity of 15m/s. It just barely clears a 5m tall wall at the peak of its trajectory. At what angle did he throw the ball? How far away is John from the wall?" So pretty much, the only thing I can't remember is how to find Vx and Vy. (To get the angle.) I know I have to break V down into components to find the angle, and I know V will be the hypotenuse of the triangle used to find the angle. Would I just use formulas to find Vf to find Vy (If I remember correctly, V is also Vx to begin with)? All I need is to know whether you find Vf to get Vy, I have the formulas for that. Thank you for your help.

please i would like if anyone can send me protocols on how to carry out MPO, SOD, GSH MDA assay with the use of a spectrophotometer and a microplate reader. also protocols on how to assay for catalase. i dont have the assay kits, i would love to get a detailed protocols on how to get or prepare the necessary buffers for the aforementioned assays. thanks

Hello everyone, I've got some homework which is about random and systematic errors. My classes job is to recognise the difference. The example we have been given, relates to our experiment we did involving rainfall, and rain gauges. I've got my answers, but not being overly confident, I'd like someone to go through them with me before I submit them. 1) The site where the gauge was placed was partly sheltered. - Systematic 2)The experimenter often miscounted the divisions on their ruler; sometimes recording a value higher than the correct value, and sometimes recording a value lower than the correct value. - Random 3)The experimenter used a home-made dip …

Question #1 The concentration of Mn^2+(aq) can be determined by titration with MnO_4^-(aq) in basic solution. A 22.50 mL sample of Mn^2+(aq) requires 38.28 mL of 4.026×10−2 M KMnO_4(aq) for its titration. Mn^2+ + MnO_4^- > MnO_2(s) (not balanced)...I think the balanced eqn simply needs "2MnO_2" on the product side...My set up is this...38.28mL KMnO_4(1L/1000mL)(4.026*10^-2/1L)(1molMn^2+/1mol KMnO_4)(1/22.50mL)(1000mL)=0.0698495868 M Mn^2+...I've also tried a 1/2 mole ratio didn't work either... Question #2 The titration of 4.90 mL of a saturated solution of sodium oxalate, Na_2C_2O_4, at 25 deg C requires 28.0 mL of 2.100×10−2 M KMnO_4 in acidic solution. What…

Hi all, I have a essay title, Compare and contrast the actions of Glucagon and Insulin in Type 1 Diabetes, what type of things and topics do you think i could mention ? any ideas anyone

A series of problems that I am stuck on, not even knowing where to start.(with the exception of #1 i did actually solve)...

im working on chemistry lab homeworka nd cant figure out this calculation. i need to find the partial pressure of butane gas collected. Ptotal=Patm=Pgas+Pwater. My butane gas volume is 95 ml. water temp is 20oC, water vapor pressure of 2.3388 kPa. room temp of 24oC and atmosphere pressure is 29.92 in/Hg which i know is equal to 1atm

one of the following is not a source of magneto static fields: a.a dc current in a wire b.a charged disk rotating at uniform speed c.an accelerated charge since i don't have a clear idea of what an accelerated charge is i am confused what the answer might be......it would be kind of some one could help me out with it, in explaining what an accelerated charge is????

If the parents (of the F1 gen) of a dihybrid cross are not true-breeding, will you still see a 9:3:3:1 ratio in the F2 generation? I did a bunch of dihybrid crosses on Kansas State Uni's website (found it on google), and literally all of the F2 generation punnet squares were not in 9:3:3:1. For example, one had 10 of a certain phenotype, another problem had 8 for a given phenotype. I started to scratch my head, because all of the questions that I answered were correct (like when it asked for a given genotype number, it'd be correct, etc). Something about genetics really crushes my brain. Sorry if I sound stupid. See? http://www.ksu.edu/biology/pob/genetics/… Not …

Chymotrypsin mechanism? what are the correct steps for the mechanism of chymotrypsin? Below is my answer but I don't know if it is right. a) His 57 catalyzes removal of H from Ser 195 hydroxyl. b. Ser 195's nucleophilic O attacks carbonyl C of substrate. c. His 57 donates H to N of sissile peptide bond, tetrahedral intermediate decomposes. d. C- terminal portion of oribinal substrate with its new amino acid terminus diffuses away. e. water donates H to His 57. f. Resulting OH attacks carbonyl of remaining substrate. g. His 57 donates H to Ser 195 O, leading to collapse of tetrahedral intermediate. h.N-terminal portion of original substrate with its new …