Tropical rain forest

 Rainfall exceeds 230 cm per year, and temperature is hot year-round, averaging 25 to 29C. 

 Tropical rainforests lie in a band around the equator within the tropics of Cancer and Capricorn (23.5° N and S). 

 Soils are commonly shallow and nutrient-poor

There is little seasonal variation in sunlight and temperature

Tropical rainforests are produced 40 per cent of NPP of terrestrial ecosystems.

TLS Online TPP Program

#Id: 700

#Unit 3. Fundamental Processes

As a general rule, increased processivity reduces the likelihood of slippage at long sequence of dTn:dAn or frameshift mutation 

TLS Online TPP Program

#Id: 701

#Unit 3. Fundamental Processes

Which of the polymerase can recognise A-A complimentary base pairs as normal

1. I 2. II 3. III     4. IV 

TLS Online TPP Program

#Id: 702

#Unit 3. Fundamental Processes

The replicase activity of DNA polymerase III was originally discovered by a conditional lethal mutation in the dnaE locus, which codes for the 130 kD, a subunit that possesses the DNA synthetic activity.

TLS Online TPP Program

#Id: 703

#Unit 3. Fundamental Processes

The 3’–5’ exonucleolytic proofreading activity is found in E, coded by the dnaQ gene

TLS Online TPP Program

#Id: 704

#Unit 3. Fundamental Processes

Mutations in dnaQ showed increased mutation frequency with by103-folds

TLS Online TPP Program

#Id: 705

#Unit 3. Fundamental Processes

Proofreading typically decreases the error rate in replication from10-5 to 10-7 per base pair replicated.