Onion DNA Extraction Activity Experiments
Objectives
DNA is the genetic material, is proved by basically three experiments:
1. Griffith's experiment - When he added dead, virulent pneumonia bacteria to a mouse, it lived; but if he added dead virulent bacteria to live non-virulent bacteria some mice died. He termed the material that changed the non-virulent bacteria to virulent the transforming principle. If we check the isolated DNA from onion for the above experiment, definitely it will give the same results.
2. Avery, MacLeod and McCarty - They used biochemical purification of cellular fractions to determine that DNA and not RNA or protein was the transforming principle.
3. Hershey and Chase The "Blender Experiment" . They knew that:
They also knew that something from T2 phage entered E. coli cells and directed the bacteria to produce more phage. They assumed that the genetic material was the material that entered the cell. So they set out to determine the chemical nature of the material. In separate experiments they infected E. coli cells with 35S or 32P labeled phage. By analyzing the products they determined that 32P entered the cell. Thus DNA must be the genetic material.
If we analyse all the above experiments with onion DNA we will get the same results; proving DNA is the genetic material of onion and each and every organism existing on earth as well.
The purpose of using soap in the DNA extraction activity using frozen strawberries is to
DNA Extraction Worksheet - PreLab Name Class & Section DNA Extraction Worksheet - PreLab After reading "Exercise 1 DDNA Extraction" in the lab manual, answer the following questions before coming to lab. This worksheet is to be turned in at the beginning of lab. 1. (2pt) Briefly, outline the procedure for isolating DNA from your cheek cells. 2. Do all cells (except mature RBCs and gametes) contain the same DNA? 3. Do all cells use genes in the same way?...
DNA Extraction Watch DNA extraction video DNA Modeling Post-laboratory questions: New lab manual page 44 1. Why do we use a commercially grown fruit in this case strawberries) for our DNA extraction? 2. What does the detergent accomplish in a DNA extract? 3. What does the salt accomplish in a DNA extract? 4. What does the addition of rubbing alcohol isopropanol) accomplish in the DNA extract? 5. Why does the solution become viscous after the addition of shampoo (detergent)? Students...
You need 180 ng of DNA to set up a PCR. Your DNA extraction has a concentration of 3ng DNA/ul. How much of my extraction do I need to use in the PCR?
In the DNA extraction lab the source for the DNA was spinach apples fresh yeast solution wheat germ
What is DNA isolation? Group of answer choices The extraction of DNA from viruses or cells. The rupturing of the DNA molecule. The moving of DNA from 1 cell to another. Copying of the DNA molecule. Measuring the DNA molecule for transport.
5) You perform 4 DNAsel footprinting experiments. All the experiments contain DNA 1. Epxeriments 2, 3, and 4 also contain Protein A which binds DNA 1 in the indicated position. DNA 1 is labeled by radio lables on the indicated ends. Arrows show positions that DNAsel can cut. Draw the banding pattern you epect to see in the 4 different experiments in the box on the right. 5.) DNAsel Footprinting You perform 4 DNAsel footprinting experiments. All the experiments contain...
In what layer, organic or inorganic, is the DNA during a the phenol:chloroform extraction?
Activity 1: Observation of Mitosis in an Onion and a Whitefish Instructions: View the images in Table 1 and Table 2 of the Activity 1 Page to complete blanks below Table 1: Stages of the Cell Cycle in Onion Root Tip Table 2: Stages of Mitosis in Whitefish Blastula *Name Each Stage *Name Each Stage (a) (b) (b) (c) (c) (d) (d) (e) *To name the stages above, choose from: Interphase, Prophase. Metaphase, Anaphase or Telophase/Cytokinesis Identify the number in...
lab:extraction of DNA from onion tissue, and strawberries Do Onions, strawberries and Bananas Have ONA? EDVOKIE *5-75 Study Questions 1. Describe the appearance of the isolated DNA. 2. What is a nucleus? 3. What are nucleotides? 4. What are chromosomes? 5. What does cell lysis mean? 6. Why did the alcohol layer on top of the DNA solution? 7. Why was it important not to mix the alcohol and DNA solutions? 8. What properties of DNA allow spooling? 9. What...