South Lewis High School – Mr. Comet Living Environment Unit 4 Note Packet




НазваSouth Lewis High School – Mr. Comet Living Environment Unit 4 Note Packet
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How are cell functions regulated?



1.


2.


** All this gene regulation allows cells and organisms to respond to their environment and control their growth and division.


Body cells of an individual can be very different from each other, even though they have descended from a single cell (zygote) and have essentially the same genetic

instructions. This is because different parts of these instructions are used in different types of cells, influenced by the cells environment and developmental history.

Genetic Research




** This technique shows great promise in agriculture. Plants with desirable qualities can be rapidly produced from the cells of a single plant. What are the drawbacks???


Drawbacks/disadvantages?




Image from: http://www.iss.k12.nc.us/schools/scavenger/tggenetics.html


Or, probably more importantly a new way to feed the world?????



Image from: http://megcooperation.gov.in/model-baproj/model%20scheme3/bt/ptc.ht2.gif


Genetic engineering: ( )


--


--





** A cell can synthesize a new chemical coded for by its new gene(s)

-- examples include interferon, insulin, and growth hormone.


Genetic engineering can


restriction enzymes –


Characteristics produced by the segments of DNA may be expressed when these segments are inserted into new organisms such as bacteria.


Inserting, deleting, or altering DNA segments can alter genes. An altered gene may be passed on to every cell that develops from it.


human genome project ---


A down side to this is that health insurance agencies and other organizations may use this genetic information against individuals.


Substances from genetically engineered organisms may reduce the cost and side effects of replacing body chemicals. Human insulin produced in bacteria is already an example of this.





Secret of Photo 51 Video Worksheet Living Environment: Comet


Directions: Answer the following questions as you view the Nova video entitled “Secret of Photo 51”. Ask your instructor to pause the program if you get terribly behind, but not after each question you might miss. You may also complete the photo quiz of this program at your instructor’s discretion.


  1. Who were the two leading DNA scientists in this field? [introduction of the video]




  1. What was Rosalind Franklin trying to do at the same time as Watson and Crick?




  1. What year did Watson and Crick receive the Nobel Prize?




  1. What is the title of James Watson’s book?




  1. Why wasn’t Franklin able to defend herself as portrayed in Watson’s book?




  1. What year and where was Rosalind Franklin born?




  1. What was the Franklin family “doing” as the Nazi party came to power?




  1. What school (college) did Rosalind Franklin attend?




  1. What is x-ray crystallography?




  1. What were Rosalind’s first experiments concerned with and how did they contribute to the war effort?




  1. Where did Rosalind work when she later moved to Paris and what did she perfect when she worked there?




  1. What often forced Rosalind to suspend her work for weeks at a time?




  1. Where in England was Rosalind offered a position?




  1. What was her main assignment when Rosalind started there in 1951?




  1. Who was in charge of Rosalind in the lab?




  1. (BONUS): Where did the assistant (Mrs. Heller) graduate from in the letter Aaron Klug speaks of?




  1. Who “enters the game” while setting up the lab at Kings?




  1. Where does Watson end up getting a position?




  1. Who was Watson’s office mate?




  1. What nickname was Rosalind given that Watson later “popularizes”?




  1. How many forms of DNA does Rosalind initially photograph?




  1. How do Watson and Crick propose to demonstrate DNA structure?




  1. Who do Watson and Crick “acquire” Franklin’s unpublished data?




  1. What does Franklin finally name her best “B form” picture?




  1. What new nickname does she acquire after this?




  1. How many angstroms per “turn” is the DNA molecule?




  1. What is the name of the pub that Watson and Crick declare that they have found the “secret of life” in?




  1. What was the general theme of her work after leaving King’s?




  1. What is she later diagnosed with and what is the probable cause?




  1. Social question: What is significant about Franklin’s upbringing and religion when she “started” her science career versus when she completed her science career?





C
omparison of a “Modern” View and Photo 51









Video Guide: “Secret of Photo 51” Living Environment: Comet


Directions: Watch for these faces as you view the Nova video entitled “Secret of Photo 51”. Make certain to pay attention to the video AND answer the questions. Ask your instructor to stop the video and review certain portions of the program so that you can fully understand the history behind the discovery of the DNA molecule.

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