When a culture of rodent cells is infected with a DNA tumor virus whose gene products bind to p53 and RB, all the cells take on characteristics of malignancy. If the viral gene coding the p53-binding protein is mutated, but that coding for the RB-binding protein is not mutated, how will infected cells respond?

TLS Online TPP Program

#Question id: 2410

#Unit 2. Cellular Organization

The plasma membrane of eukaryotic cells is supported by: 

TLS Online TPP Program

#Question id: 27080

#Unit 1. Molecules and their Interaction Relevant to Biology

Choose the correct statement about Vander-wall interaction  

1. Van der Waals potential (E_vdw) is the sum of all interactions over all atoms

2. Van der Waals potential (E_vdw)  is calculated by

3. This type of interaction is often called a 6–12 interaction, or the Leonard Jones potential.

4. Van der Waals forces are extremely weak, especially when compared with other forces influencing protein conformation

TLS Online TPP Program

#Question id: 13084

#Unit 13. Methods in Biology

Statement: In a modified version of AFLP, the selection of fragments using biotin-streptavidin binding is avoided.

Explanations: I. The fragments are ligated to the appropriate adapters and used for PCR amplification using two AFLP primers, each primer having a single selection nucleotide; this is called preamplification step.

II. The PCR products from this preamplificated step are diluted and used as template for second PCR amplification.

TLS Online TPP Program

#Question id: 12928

#Unit 13. Methods in Biology

Name the enzyme which is used to stabilize bases.

TLS Online TPP Program

#Question id: 3644

#Unit 3. Fundamental Processes

In replication: soon after synthesis, the DNA fragments are joined to make one continuous piece of DNA by the enzyme: