• Home
  • Forum
  • Dictionary
  • Articles
  • Tutorials
  • Books
  • Directory
  • Share your work


Dictionary » A » A-form dna

A-form dna

[[A-form dna]]

(Science: molecular biology) One of several forms that can be assumed by a double helix. A-dna is stable in dehydrated conditions.

this form is less common than the dominant form found under physiological conditions -- beta-dna. This form is also assumed by dna-rna hybrid helices and by regions of double-stranded rna. It is a right-handed helix and is a more compact form than beta-dna.


Please contribute to this project, if you have more information about this term feel free to edit this page



Results from our forum


Help: Confused with primers in a PCR of a vector?

... I should get are: 1) T3 - coding region - T7 2) ??? It looks like it WON'T be a proper PCR reaction? Will we just get one massive chunk of DNA? 3) coding region - T7 4) T3 - coding region I think the point of this entire process was to just determine the directionality of our insert. Because ...

See entire post
by keetner
Sat Mar 15, 2014 3:21 am
 
Forum: Molecular Biology
Topic: Help: Confused with primers in a PCR of a vector?
Replies: 0
Views: 65

Gel electrophoresis

toooo much DNA

See entire post
by JackBean
Wed Mar 12, 2014 2:24 pm
 
Forum: Genetics
Topic: Gel electrophoresis
Replies: 3
Views: 235

Re: Why do Africans have large noses and lips?

I don't know the answer to this specific question, but we do know some things about how genes are linked on DNA. Sometimes a trait that is helpful for survival is very closely associated with another trait on the DNA strand. So when natural selection keeps trait A in the gene ...

See entire post
by anneland
Sun Mar 09, 2014 6:54 pm
 
Forum: Human Biology
Topic: Why do Africans have large noses and lips?
Replies: 30
Views: 186236

Polymorphism and Mutation

... to a single individual that may or may not be propagated. For example a single point mutation where a base is replaced or deleted from a strand of DNA. This may cause the individual some discomfort or problems but is normally isolated to the individual. A polymorphism is a distinct population of ...

See entire post
by Babybel56
Wed Mar 05, 2014 3:39 am
 
Forum: Molecular Biology
Topic: Polymorphism and Mutation
Replies: 2
Views: 227

cladograms

Here is a task: Look at the picture - you see three DNA sequences from three species that are related. Based on that sequence only, draw a cladogram that best represents their relatedness. http://i59.tinypic.com/2jbmgax.jpg My thoughts: Since species ...

See entire post
by leeroykincaid
Tue Feb 25, 2014 8:09 pm
 
Forum: Evolution
Topic: cladograms
Replies: 7
Views: 315
View all matching forum results

This page was last modified 23:43, 28 October 2006. This page has been accessed 6,070 times. 
What links here | Related changes | Permanent link