Science & Mathematics - 22 December 2007

In my bio paper..
'Flavr Savr' tomotoes are tomatoes that have been genetically modified so that they take longer than normal to ripen. This delay has been achieved by disabling a critical tomatoe gene so that it fails to produce a protein that is needed for the ripening to occur. In order to disable the gene, a start codon is inserted at the beginning of the nonsense strand so that both the sense and nonsense strand are copied into mRNA.

Why will this prevent a polypeptide from being produced?

2007-12-22 23:55:06 · 2 answers · asked by Anonymous in Botany

To prepare a solution for which you need to know the concentration accurately, you weigh out 4.2079g of sodium chloride and dissolve it in about 40cm3 of water in a beaker. You want to make this up to a final volume of 100cm3 of water, do you:
i) add water up to the 100cm3 line;
ii) transfer the solution into a measuring cylinder and add water up to the 100cm3 line;
iii) transfer the solution into a 100cm3 volumetric flask and add water to the mark;
iv) pipette 60cm3 of water into the solution.
Explain your choice.

2007-12-22 23:52:49 · 4 answers · asked by Jerome D 1 in Chemistry

The dimensions of a rectangle are 2x + 1 and x - 1. if each dimension is increased by 2 units, write and simplify an expression that represents the increase in area.

2007-12-22 23:43:25 · 5 answers · asked by Anonymous in Mathematics

5^y-1 = 25^2y-1

4^2t + 1 = 8^2t - 1

6^3x + 5 = 36^3x + 6

2007-12-22 23:40:00 · 3 answers · asked by Anonymous in Mathematics

im in the UK. It's SUNNY!
WTH

Whats happening?

Typical british weather. Rains when we dont want it to and sunshines at the wrong times! AH

2007-12-22 23:38:10 · 7 answers · asked by Anonymous in Weather

2007-12-22 23:20:21 · 1 answers · asked by Jerome D 1 in Chemistry

2007-12-22 23:19:27 · 3 answers · asked by rock 2 in Chemistry

can someone explain in a simple way and detailed way

2007-12-22 23:15:52 · 5 answers · asked by Tom W 1 in Earth Sciences & Geology

I want to copy-paste on Word, but I need a blank map. All outline maps I've seen on the net have some annoying web address printed across the Tropic of Cancer! I need one map that is perfectly clear. Similar help with the political map of India will be appreciated.

I wonder why they don't put the web address in some corners. It's really annoying if it is put across the map region, and it just won't do for my homework!

2007-12-22 23:13:40 · 7 answers · asked by Akilesh - Internet Undertaker 7 in Geography

Hey, this isn't homework I'm studying for my A-level exam in January and don't understand this type of question and can't ask my teacher because we're off school. I would use simultaneous equations but there's 3 unknown variables.

The curve with equation y=ax^2 + bx + c passes through the point (1,2). The gradient of the curve is zero (0) at the point (2,1). Find the values of a,b,c.

I'd appreciate it if you even told me HOW to go about it without necessarily providing an answer.

2007-12-22 23:07:09 · 4 answers · asked by Anonymous in Mathematics

2007-12-22 23:06:36 · 5 answers · asked by Anonymous in Weather

http://www.youtube.com/watch?v=fCO7MRkDD_c&feature=related

2007-12-22 22:57:36 · 22 answers · asked by Life goes on... 6 in Paranormal Phenomena

Suspend a heavy weight from a light string and attach a similar string below it. If you pull on the lower string with an steadily increasing force, the upper string will break; if you pull the lower string with a jerk, the lower string will break.

2007-12-22 22:54:01 · 3 answers · asked by Dan Michael D 1 in Physics

the acceleration of an apple as it falls from the tree through the air.

2007-12-22 22:49:51 · 6 answers · asked by Dan Michael D 1 in Physics

What does polarize (as in plane-polarized light) mean?

What is the purpose of the polarizer?

and Why do we need to know specific rotation?

and please don't quote from a text book, i need to understand this!!!!!????

2007-12-22 22:47:14 · 2 answers · asked by Anonymous in Chemistry

given 3 balls made of the same material but of different sizes (small, medium and large).

2007-12-22 22:46:35 · 2 answers · asked by Dan Michael D 1 in Physics

What are the risks?

2007-12-22 22:39:57 · 6 answers · asked by Buzzard 7 in Medicine

The cost of an adult ticket to a football game is $1.75. The cost of a student ticket is $ 1.25. Total receipts last week from ticket sales were $ 1700. If the number of students tickets sold was twice the number of adult tickets, how many of each type were sold?

Thank you for your help

2007-12-22 22:33:36 · 6 answers · asked by Anonymous in Mathematics

if a copper plate and a steel plate of the same size and shape were released from the same height.

2007-12-22 22:19:05 · 12 answers · asked by Dan Michael D 1 in Physics

5a) 4/x+3 plus 5/4x + 12

B) 1/3y-15 minus 2/y-5


Merry Christmas

2007-12-22 22:11:43 · 3 answers · asked by Anonymous in Mathematics

2007-12-22 21:55:22 · 2 answers · asked by Anonymous in Earth Sciences & Geology

2007-12-22 21:21:55 · 3 answers · asked by sacchin b 1 in Chemistry

Is this right? Or is there a better way to find co-ordinates? It was the only way I could think of to do it, since it has to form a square, ABCD.

http://s221.photobucket.com/albums/dd223/azuradragonfly/?action=view¤t=maths1.jpg

2007-12-22 21:13:45 · 3 answers · asked by azuradragonfly 1 in Mathematics

how did god appear? how long is the whole universe? what really made the planets?

2007-12-22 21:09:28 · 5 answers · asked by briar-an balatbat 2 in Astronomy & Space

2007-12-22 21:04:34 · 18 answers · asked by daren s 2 in Astronomy & Space

I have ordered list of real numbers. Instead of having integer order number for each element (1, 2,...), I would like to have order numbers that reflect the proximity between two elements. For example, if 4th element's value is 0.5678 and 5th element has value of 0.5682, I want to have order number for 5th element to be something like 4.12 because two numbers are very close.
Are there any methods to do things like this?

2007-12-22 20:57:38 · 2 answers · asked by Anonymous in Chemistry

I just noticed everyday when i watch the clouds i can see it is always different. why is that?

2007-12-22 20:42:18 · 11 answers · asked by briar-an balatbat 2 in Earth Sciences & Geology

I got a table in a bio paper:

Type of Nucleic Acid Proportion of organic bases
(percentage)
A G C T/U
Squirrel DNA 29 21 22 28
Shark DNA 28 21 21 30
Human mRNA 40 15 30 15

a) Explain why the proportion of Adenine and Guanine is approximately equal to that of Thymine and Cytosine in both pieces of DNA

b) Explain why a similer equality does not exsit between the proportion of A+G and the proportion of U+C in the RNA.

c) Despite being very different organisms, the squirrel and the shark have simelar proportions of the four different bases in their DNA. Explain how this is possible.

I am completely lost...
Please Please please help if you can! I'm really struggling!

2007-12-22 20:30:28 · 4 answers · asked by Anonymous in Biology

Lets face it "Evolutionary Genetics is theoretical castles-in-the-sky, substantially disconnected from empirical reality: amorphous and ultimately not an empirical science. "Punctuated Equilbrium" Geneticist John Maynard-Smith argues that punctuated equilbrium is implausible because of it's high cost!- it slows beneficial evolution dramatically! ..... "Hit a Evolutionary geneticist in the face with a 3 lb brick..and he'll "CALL" on his compassion....Hit him in the face with the "TRUTH" and he'll "CALL" the POLICE ! ......... G'nite "kmart" shoppers and thanks for coming!

2007-12-22 20:24:02 · 7 answers · asked by Archie P 1 in Biology

2007-12-22 20:18:26 · 3 answers · asked by Anonymous in Biology