QUESTION 1 Several experiments were required to demonstrate how traits are inher

Question

QUESTION 1

Several experiments were required to demonstrate how traits are inherited. Which scientist or team of scientists first demonstrated that cells contain some component that can be transferred to a new population of cells and permanently cause changes in the new cells?

a-Griffith

b-Watson and Crick

c-Avery, MacLeod, and McCarty

d-Hershey and Chase

QUESTION 2

From your results, which one of the cellular components can be determined NOT to be the component responsible for genetic inheritance? Why?

a-Proteins because these macromolecules become denatured with heat.

b- DNA because these macromolecules form a single helix in solution. c- RNA because it's double stranded 100% of the time. d- Sugars because glycolysis happens. Instructions Imagine that the year is 1928 and the scientific world is in an uproar trying to determine what component of the cell isresponsible for genetic inheritance. Is it DNA, protein perhaps even RNA? You are busy in your lab, trying to help solve this crucial mystery that still plagues (then) modern day biology. Your work focuses on a microorganism, a bacterium named Streptococcus pneumoniae, and its effects on mice. There are two strains of S oneumoniae (which is responsible for pneumonia), the "Rough" strain (R) and "Smooth" strain (S). The strains are very similar except the S strain has a smooth polysaccharide coat that enables the microorganism to avoid the organism's immune system and cause illness (and death in mice). The R strain has a rough coat which is detected and dealt with by the immune system (and as a result causes no death in mice) You decide to perform a series of experiments using the R and S strain of S. pneumoniae involving injections of these strains in mice. Your results are documented in the figure below:

Explanation / Answer

Answer:

1) Which one of the following experimental trials below are considered to be controls for this experiment

2) Which scientist or team of scientists obtained definitive results demonstrating that DNA is the genetic molecule

3) Hershey and Chase used radiolabeled macromolecules to identify the material that contains heritable information. What radioactive material was used to track DNA during this experiment?

4) DNA molecules, like proteins, consists of a single, long polymeric chain that is assembled from small monomeric subunits – FALSE (DNA is double stranded molecule)

5) The polarity of DNA strand results from the polarity of the nucleotide subunits - TRUE

6) There are five different nucleotides that become incorporated into a DNA strand – FALSE (There are four different nucleotides Adenine, Thymine, Guanine and Cytosine)

7) Hydrogen bonds between each nucleotide hold individual DNA strands together - FALSE

8) Several experiments were required to demonstrate how traits are inherited. Which scientist or team of scientists first demonstrated that cells contain some component that can be transferred to a new population of cells and permanently cause changes in the new cells?

9) From your results, which one of the cellular components can be determined NOT to be the component responsible for genetic inheritance? Why?

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