Wednesday
October 1, 2014

Homework Help: physics

Posted by aly on Thursday, April 28, 2011 at 12:55am.

The physics of the DNA molecule.

The two strands of the DNA molecule are held together by electrostatic forces. There are four bases which make up the DNA molecule, thymine (T), adenine (A), cytosine (C), and guanine (G). In two of the bases, thymine and adenine, an oxide ion with a single negative charge (O-) from the thymine base is attracted to a hydrogen ion (H+) from the adenine ion. The distance between the two ions is 28.0 nm. Note that the oxide ion
has a charge equivalent to a negative elementary charge and the hydrogen ion is equivalent to a positive elementary charge.
a) What is the strength of the electrostatic force between these two ions?
b) What is the direction of the force exerted on the oxide ion by the hydrogen ion?
(Assume that the oxide ion is to the right of the hydrogen ion.)
c) How many hydrogen ions would it take to equal the amount of charge contained in a lightning bolt, 25 coulombs?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

BIOLOGY - WHEN A DNA MOLECULE IS COPIED TO MAKE ANOTHER DNA MOLECULE, WHICH ...
Physics - The two strands of the helix-shaped DNA molecule are held together by ...
AP BIO - 2. Suppose the DNA molecule were composed of six monomers. In addition...
biology - 1. What are the three parts that make up a nucleotide? 2. What is the...
BIOLOGY - 1.What is the function of DNA? 2.Name 3 parts of DNA molecule 3....
Science - After replicated a DNA molecule with two strands three times, how many...
Science - I did your corrections. I just wanted to know if all the sentences are...
English - I'd like you to check these sentences grammatically. I also would like...
Biology - Kay so these are the strands of DNA 5' C C A G T A G T T 3' 3' G G T C...
Biology - 1. How many base pairs are in a full turn or twist of a DNA molecule? ...

Search
Members