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1. Read through the INTRODUCTION. Answer the questions in between each historical section.
PRE-LAB: LAB EXERCISE 7 Directions: Use the lab manual to answer the following questions in COMPLETE SENTENCES AND IN YOUR OW
The Evidence : 1869-1924 1869: DNA, first called nuclein, is identified in cell nuclei of human white blood cells. Ulein, is


233333333333333333 The Evidence: 1953 1953: Rosalind Franklin, working in Maurice Wilkinslab, determines the space relations
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1. Chromosomes are made up of DNA which is acidic in nature and protein.

2. What is the role of proteins in chromosome?

1. DNA is the genetic material of all the living organism.

2. In the question it is given that the non virulent strain was transformed with the DNA of virulent strain. So now you have to investigate how is DNA transferred from one generation to the other ?

3. I would say that DNA is not a simple molecule. It is a complex polymer of a nucleotide where one molecule of nucleotide is made up of a phosphate group, deoxyribose sugar and a nitrogenous base. There are four types of nitrogenous bases and therefore four types of nucleotides. The combination between these four nucleotides is responsible for the variations we see between different individuals. Therefore DNA is not a simple molecule to cause variation between organisms.

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