Homo erectus– Invent fire

TLS Online TPP Program

#Id: 6714

#Unit 8. Inheritance Biology

Advantages of using bacteria and viruses for genetic studies

Reproduction is rapid. 

Many progeny are produced. 

The haploid genome allows all mutations to be expressed directly. 

Asexual reproduction simplifies the isolation of genetically pure strains. 

Growth in the laboratory is easy and requires little space. 

Genomes are small. 

Techniques are available for isolating and manipulating their genes. 

They can be genetically engineered to produce substances of commercial value. 

TLS Online TPP Program

#Id: 9351

#Unit 4. Cell Communication and Cell Signaling

RII exhibits constitutive kinase activity; means it is active even when not bound to TGF-β.

TLS Online TPP Program

#Id: 6119

#Unit 3. Fundamental Processes

Mutations in MutS/L components can lead to hereditary nonpolyposis colorectal cancer (HNPCC). A characteristic feature of HNPCC is microsatellite instability, in which the lengths (numbers of repeats) of microsatellite sequences change rapidly in the tumor cells due to the loss of the mismatch repair system to correct replication slippage in these sequences.

TLS Online TPP Program

#Id: 8976

#Unit 11. Evolution and Behavior

Rate of evolution = Number of amino acid different / Total time

Hint:  Total time = 2xT

Rate of Change per amino acid per year = rate of evolution / total amino acid

TLS Online TPP Program

#Id: 2601

#Unit 13. Methods in Biology

A modification of overlap extension PCR may also be used to construct directed mutations; this is termed megaprimer PCR .