The first commercial Bt cotton variety was released in USA by Monsanto (Bollgard), which contains Cry 1Ac gene of Bacillus thuringiensis. (first generation Bt-cotton)

TLS Online TPP Program

#Id: 511

#Unit 2. Cellular Organization

Viral and bacteriophage genomes have almost no repeated DNA, and L is approximately equal to N.

TLS Online TPP Program

#Id: 512

#Unit 2. Cellular Organization

Repetitive DNA sequences renature faster than non repetitive DNA due to uniformity of sequence.

TLS Online TPP Program

#Id: 513

#Unit 2. Cellular Organization

Cot1/2 is concentration of ssDNA left after time t. T1/2 is time taken for half renaturation.

TLS Online TPP Program

#Id: 514

#Unit 2. Cellular Organization

Low Cot1/2 value means

1. Low complexity with high repeats

2. High complexity with high repeats

3. Low complexity with no repeats

4. no complexity and no repeats

TLS Online TPP Program

#Id: 515

#Unit 2. Cellular Organization

Number of Genes present in per million base pair of genome is called gene density.

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.