Zeff=Z –S

Chlorine would have a Z value of 17 (the atomic number of Chlorine). Continuing to use Chlorine as an example, the 10 inner electrons (S) would screen out the positive charge of ten protons. Therefore there would be and effective nuclear charge of 17-10 or +7.

TLS Online TPP Program

#Id: 516

#Unit 2. Cellular Organization

Escherichia coli K-12 is 4.6Mb genome with 4400 genes so gene density 950 genes/Mb.

TLS Online TPP Program

#Id: 517

#Unit 2. Cellular Organization

Homo sapiens has 3200 Mb genome in which 20,000 genes are present so Gene density will be 6.25 genes/Mb.

TLS Online TPP Program

#Id: 518

#Unit 2. Cellular Organization

Gene density has inverse relation with complexity of genome.

TLS Online TPP Program

#Id: 519

#Unit 2. Cellular Organization

Escherichia coli K-12 with 950 gene/Mb gene density has 0 introns in genome and less than 1% repetitive sequences

TLS Online TPP Program

#Id: 520

#Unit 2. Cellular Organization

Humans have 6.25 gene/Mb gene density has avarege of 6 introns in genome and less than 46% repetitive sequences.

TLS Online TPP Program

#Id: 521

#Unit 2. Cellular Organization

Yeast genes are short, but genes in flies and mammals have a dispersed bimodal distribution extending to very long sizes.