Science & Mathematics - 14 January 2007

I need to correct my answers from a quiz, to get some make-up points. Any help would be amazing. Please put the correct answers and a sentence explanation of why it is correct.

Restriction enzymes recognize DNA sequences with -
A- Many C's/many G's
B- Parallel nature
C- Twofold dyad symmetry.

Genetic recombination ca occur in bacteria by all of the following EXCEPT
A- Transfer of DNA through pili
B- DNA amplification
C- Mutation
D- Transduction

And the last one is
Regulatory protiens shuto off transcription by ninding to a site directly in front of the promoter, this site is the
A- Suppressor site
B- Operator site
C Regulatory site
D- Transcriptional control site

2007-01-14 09:18:55 · 1 answers · asked by thegreenmooseofdoom 2 in Biology

Yeah i have a science question and i need help so if u can answer my question

2007-01-14 09:18:33 · 8 answers · asked by colorguardxfreak 2 in Zoology

The objective is to be able to determine the sugar content of various drinks, i.e. sweet tea and soft drinks, by the amount of refraction measured, accurately, when shining a laser light through the fluid. Thanks for any tips on building a measurement device.

2007-01-14 09:18:09 · 1 answers · asked by Martin 1 in Chemistry

1) 0.314
2) 1.14
3) 3.14
4) 3.33

2007-01-14 09:17:48 · 11 answers · asked by Anonymous in Mathematics

I was thinking about this the other day and wondering about magnetic flux and gravity-- I know that they are not related, but was wondering about the similarities. Does magnetic flux travel at the speed of light? What is magnetic flux? By that I mean how is it transmitted? Light is photons, and possibly gravity transmitted by gravitons--so what is magnetic flux made out of? I was wondering if gravity could be described in a similar fashion--as a field but without the flux lines--sort of a gravity flux sphere I guess. I know that we don't really understand how gravity really works yet, whether it is particle or field or both or something else entirely that we haven't thought of yet, was just wondering if someone could clear up the magnetic flux thing.

On a side note, are the strong and weak forces similar? Are they fields too? Thanks!

2007-01-14 09:17:15 · 4 answers · asked by ~XenoFluX 3 in Physics

2007-01-14 09:17:13 · 11 answers · asked by Anonymous in Astronomy & Space

find the equation of the line that passes through the point (-2, -7) and is parallel to the line 2x + 3y = 4

could u show me how to do this?

2007-01-14 09:17:13 · 11 answers · asked by argentina_mandy20 1 in Mathematics

when 0.860g of an organic compound contanining Carbon, Hydrogen, and Oxygen was burned completely in oxygen, 1.64 grams of carbon dioxide & 1.01 grams of water was produced. What is the empricial formula? Thanks for the help =)

2007-01-14 09:15:00 · 2 answers · asked by halomann4 1 in Chemistry

2007-01-14 09:13:33 · 9 answers · asked by Andrew S 1 in Botany

any one know ?

2007-01-14 09:12:30 · 7 answers · asked by guitarist2309 2 in Astronomy & Space

2007-01-14 09:12:11 · 13 answers · asked by Andrew S 1 in Botany

2007-01-14 09:11:07 · 7 answers · asked by Anonymous in Chemistry

The answer is supposed to be odd both of them but i don't get how?
a. (x^6+1) / x

b. (cube root of 10x )/ - 0.1x^2

2007-01-14 09:04:55 · 3 answers · asked by English Wiz 4 in Mathematics

The electricity costs of a business increased from $18,000 one year to $19,000 the next. To the nearest whole percent, what was the rate of increase?

2007-01-14 09:03:16 · 5 answers · asked by barbjs45 1 in Mathematics

2007-01-14 09:01:52 · 26 answers · asked by hksummers2004 1 in Weather

I'm going to Europe (Poland), in the summer and I have alot of electronics I want to bring. But a relative told me that the outlets and voltage is different there.
Is there a way to still charge my items with out them breaking?
Can I buy special plugs?
Where?

2007-01-14 09:00:44 · 4 answers · asked by Crayon 1 in Engineering

I saw a black squirrel in Central New Jersey on Friday. This is the first time I ever saw one. I live right by a park and there are thousands of squirrels, but this is the first time I saw a black squirel has anyone seen one in New Jersey? Should I tell someone? Are they danageruous?

2007-01-14 09:00:27 · 4 answers · asked by toby 1 in Zoology

same number of protons, same number of electrons, they are neutral, or they have the same number of valence electrons.

2007-01-14 09:00:05 · 4 answers · asked by Anonymous in Chemistry

antiderivative of:
2xsin(1-3x^2)

2007-01-14 08:56:45 · 4 answers · asked by Xia W 1 in Mathematics

2007-01-14 08:56:00 · 1 answers · asked by Anonymous in Mathematics

i know the steps but i can't seem to get it

2007-01-14 08:55:35 · 5 answers · asked by huronda_hottie_2006 1 in Mathematics

2007-01-14 08:53:28 · 7 answers · asked by Anonymous in Physics

2007-01-14 08:53:20 · 2 answers · asked by rimshabaz 1 in Earth Sciences & Geology

what substance is converted to propene by cracking?

2007-01-14 08:52:44 · 5 answers · asked by Stephanieee! 1 in Chemistry

The distance from the Earth to the Sun, Mercury, Mars, Venus, Jupiter, Saturn, Uranus, Neptune and Pluto?

2007-01-14 08:52:23 · 5 answers · asked by Ahmed Yar K 2 in Astronomy & Space

how do you factor the top so i can cross something out with the (x+2)(x-2) on the bottom?

2007-01-14 08:51:58 · 3 answers · asked by huronda_hottie_2006 1 in Mathematics

2007-01-14 08:51:48 · 3 answers · asked by Anonymous in Physics

2007-01-14 08:50:37 · 8 answers · asked by Anonymous in Mathematics

plz help!!!

2007-01-14 08:50:34 · 3 answers · asked by gellyyy 2 in Mathematics

2007-01-14 08:49:56 · 1 answers · asked by Anonymous in Physics