Cross Academy
Please log in or register if you have not done so already!
Cross Academy

A study tool for the freshmen at UGHS
 
HomeHome  FAQFAQ  SearchSearch  MemberlistMemberlist  UsergroupsUsergroups  RegisterRegister  Log inLog in  

Share | 
 

 Assesment Questions

Go down 
AuthorMessage
Admin
Admin
avatar

Posts : 191
Join date : 2008-09-24

PostSubject: Assesment Questions   06/01/09, 09:27 pm

(Highlight space under question for answer)

1.List four different ways in which scientists can manipulate DNA. Notes
- Chemical mutagens are used to change DNA sequences
- Computers analyze and organize the vast amounts of data from genetic research
- Enzymes, often from bacteria, are used to cut and copy DNA
- Bacteria also provide one of the ways in which genes are transferred between different organisms


2.What determines how DNA will be cut by a restriction enzyme?Notes
The enzymes cut where they find specific nucleotide sequences.

3.How does gel electrophoresis separate DNA fragments from each other? Notes

•Gel Electrophoresis- DNA is loaded into gel (like hard gelatin) with a positive charge on one side and a negative charge on the other end. DNA has a negative charge, so the fragments move to the positive electrode.

•Gel has tiny pores to allow small molecules to travel fast through the gel. However, the big pieces will move slowly.

•Length of the DNA fragment is estimated by distance traveled through the gel in a certain period of time


4.Suppose you cut DNA. You know that you should find four DNA fragments on a gel, but only three appear, and one fragment is very large. Explain what happened. Notes
The gene mutated, creating a different pattern of bands.

5.What is the relationship between sites and a restriction map? SiteRestriction Map
The sites that the enzyme cuts will effect how the restriction map looks.
Back to top Go down
View user profile http://crossacademy.webgoo.us
 
Assesment Questions
Back to top 
Page 1 of 1
 Similar topics
-
» 'Flies in winter' questions
» Questions about Atlantis and Lumuria
» Lacson questions police helicopter purchase
» Our Earthly Questions About our Heavenly Home
» Additional optional questions for the round robin questionnaire and ideas lists

Permissions in this forum:You cannot reply to topics in this forum
Cross Academy :: Honors Biology :: Mrs. St. Clair :: Chapter 9 :: 9.1- Manipulating DNA-
Jump to: