Question

Replication Questions: Why might a cell need to replicate all of its chromosomal DNA? . Please refer to your DNA replication diagram. After one round of replication, how much of each DNA daughter molecule is composed of the original parental DNA? 3. Please refer to your DNA replication diagram. After two rounds of replication, how much of each granddaughter molecule is composed of the original parental DNA? LAB REPORT 4. Refer to your answers to the above two questions to explain why DNA replication is referred to as being semi-conservative. 5. Define the following terms and explain how they are related to each other: DNA nucleotide, DNA strand, and DNA molecule. Exercise 14 DNA Replication and Gene Expression: Lab Report 209

Answer 1

material must produce copies of itself 1. A genetic number of organism. a darge. during the life cycle of A cell duplicate its chromosomal DNA through the process of replication. The DNA replication is the checkpoint & preserve genomic integrity. tells need the daughter cell produced by each cell must contain Samse genetic combination as that of mother cell in the process of copying a DNA molecule to produce a identical DNA molecule is called DNA repin. They must be replicated exactly a person. to preserve unique traits of On A replication. undels of

2. The oratically there is 3 models of On A replication. ) Dispersive 2) conservative 3 semi conservative Semi Among the 3 sensi conservative replication ersethod can express explains DNA replication mode suits for DNA replications. In sensi conservative mode of replication each daughter DNA molecula consits of one old o one new Strand. Here in this diagrams also, ea after Ist round af replication each daughter DNA Consists of one parental strand. That is a new daughter DNA molecule Contain one new strand & one old strand.

mode of DNA 13 As per semi conservative daughter molecule is composed replication, 2% of grand of original parental DNA.

4 why DNA Replication is termed as semiconsavaka As molecule is per the given GATAG diagrams the provental & its daughter indente сти те GA T o co old strand GAT AGca strand, c T T C G CT T C G - New Daughter ona molecule I Daughter molecule That is Each newely Synthesized DNA molecule one progeny, new, daughter straida and one parental cold strand (Teunplate strand). Ws model was proposed by watson & crick main features of this model are " progressive separation of a strauds of DNA () Complementary base pairing af bases (1) Forroat on P phosphodiestez bond between neighbouring Deery ribo nucleotide, that are based paared with the single strands. & producing a new strand (iv) each ona molecule produced by replication has one old and one new strand.