DNA

Rating : Rate It:
 
There is no comments now for this Slide.
Post a comment
    Post Comment on Twitter
Comments:  



  Notes
 
 
Slide 1 : DNA Section 12–1
Slide 2 : This section tells about the experiments that helped scientists discover the relationship between genes and DNA. It also describes the chemical structure of the DNA molecule.
Slide 3 : Griffith and Transformation What did Frederick Griffith want to learn about bacteria? He wanted to learn how certain types of bacteria produce pneumonia
Slide 4 : The strain of bacteria that caused pneumonia grew into_________ colonies on culture plates; harmless bacteria produced colonies with edges. Smooth
Slide 5 : a. Mice injected with bacteria from smooth colonies died. d. Mice injected with a mixture of bacteria from heat-killed smooth colonies and live rough colonies died.
Slide 6 : What result from Griffith’s experiment suggested that the cause of pneumonia was not a chemical poison released by the disease-causing bacteria? The mice survived after being injected with heat-killed disease-causing bacteria.
Slide 7 : What is transformation? It is the process by which one strain of bacteria changes into another.
Slide 8 : What hypothesis did Griffith form from the results of his experiments? Some factor,which might be a gene, was transferred from the heat-killed bacteria cells into the live cells.
Slide 9 : Avery and DNA Is the following sentence true or false? Avery and his colleagues thought that the molecule required in transformation might also be the molecule of the gene. True
Slide 10 : Avery and DNA Briefly describe how Avery and his group determined which molecule was most important for transformation? They treated the extract of heat-killed bacteria with enzymes that destroyed proteins, lipids, carbohydrates, and other molecules, including RNA and DNA.
Slide 11 : Avery and DNA Briefly describe how Avery and his group determined which molecule was most important for transformation? They treated the extract of heat-killed bacteria with enzymes that destroyed proteins, lipids, carbohydrates, and other molecules, including RNA and DNA.
Slide 12 : Avery and DNA Briefly describe how Avery and his group determined which molecule was most important for transformation? They treated the extract of heat-killed bacteria with enzymes that destroyed proteins, lipids, carbohydrates, and other molecules, including RNA and DNA.
Slide 13 : Avery and DNA Transformation did not occur when _______was destroyed. DNA
Slide 14 : Avery and DNA What was the conclusion from Avery’s experiments? DNA was the transforming factor.
Slide 15 : The Hershey-Chase Experiment What is a bacteriophage? It is a virus that infects bacteria
Slide 16 : The Hershey-Chase Experiment Parts that makes up a bacteriophage are: Protein Coat DNA core
Slide 17 : The Hershey-Chase Experiment What happens when a bacteriophage infects a bacterial cell? The bacteriophage injects its DNA into the cell. The viral genes act to produce many new bacteriophages, which burst out when the cell splits open.
Slide 18 : The Hershey-Chase Experiment How would Hershey and Chase learn whether genes were made of protein or DNA? If they could determine which part of the virus entered the infected cell, they would learn whether genes were made of protein or DNA.
Slide 19 : The Hershey-Chase Experiment The molecule for which phosphorus-32 (32P) is used as a radioactive marker is___. DNA
Slide 20 : The Hershey-Chase Experiment Is the following sentence true or false? 35S was found in the bacteria, it would mean that the viruses’ DNA had been injected into the bacteria___________. false
Slide 21 : The Hershey-Chase Experiment What results did Hershey and Chase observe? Nearly all of the radioactivity in the bacteria was from phosphorus, the marker found in DNA.
Slide 22 : The Hershey-Chase Experiment Hershey and Chase concluded that the genetic material of the bacteriophage was_____. DNA
Slide 23 : The Components and Structure of DNA List the three critical things that genes were known to do. a. Genes had to carry information from one generation to the next. b. Genes had to determine the heritable characteristics of organisms. c. Genes had to be easily copied.
Slide 24 : The Components and Structure of DNA Adenine, guanine, cytosine, and thymine are four kinds of _______bases in DNA. nitrogenous

 


Related  Most Viewed

More By User

Flag as inappropriate

Free Medical Powerpoint Templates
Add as Friend Ahmed Salama     10 Months ago.

Category: Genetics
Tags:
Embed:
432 Views, 0 favourite
DNA structure





Featured | Myworld | Browse | Patients | Popular | Latest | Tags | Conferences | Contact | Feedback | About Us | FAQ | RSS

Powerpoint Templates

Animated Powerpoint Templates | Business Powerpoint Templates | Education PPT |Mac PPT | Medical Powerpoint Templates |Powerpoint Maps | Technology PPT

copyright © www.SlideWorld.org