The E. coli rrn  promoters are also regulated by a pair of small molecules: the initiating NTP (the iNTP) and an alarmone,  guanosine 5 -diphosphate 3-diphosphate (ppGpp). 

1. An abundance of iNTP indicates that the concentration of  nucleotides is high, and therefore it is appropriate to synthesize plenty of rRNA. 

2. Accordingly, iNTP stabilizes the open promoter complex, stimulating transcription. 

3. On the other hand, when cells are starved for amino acids, protein synthesis cannot occur readily and the need for ribosomes (and rRNA) decreases. 

TLS Online TPP Program

#Id: 6910

#Unit 8. Inheritance Biology

Reverse duplication - Duplicated segment is inverted.

 

TLS Online TPP Program

#Id: 6083

#Unit 10. Ecological Principles

Hot spots of biodiversity

There is a in situ conservation. the hot spots are the richest and the most threatened reservoirs of biodiversity on the earth.

To qualify as a biodiversity hotspot, a region must meet two strict criteria:

A) It must have at least 1,500 vascular plants as endemics - which is to say, it must have a high percentage of plant life found nowhere else on the planet

B) It must have 30% or less of its original natural vegetation. In other words, it must be threatened.

Other 

High degree of endemism (Restricted habitat) 

High degree of exploitation 

High Degree of Biodiversity 

TLS Online TPP Program

#Id: 6725

#Unit 8. Inheritance Biology

Mapping with transformation

TLS Online TPP Program

#Id: 4890

#Unit 13. Methods in Biology

The outcome variable is known as the dependent or response variable and the risk elements, and co-founders are known as predictors or independent variables.

TLS Online TPP Program

#Id: 2715

#Unit 12. Applied Biology

Microbial growth curve composed of four distinct phases of growth

Lag phase

Exponential or log phase

Stationary phase

Death or decline phase