Practice Questions

TLS Online TPP Program

#Question id: 3834

In his transformation experiments, what phenomenon did Griffith observe?

#Unit 3. Fundamental Processes

Mixing a heat-killed pathogenic strain of bacteria with a living nonpathogenic strain can convert some of the living cells into the pathogenic form.
Mixing a heat-killed nonpathogenic strain of bacteria with a living pathogenic strain makes the pathogenic strain nonpathogenic.
Infecting mice with nonpathogenic strains of bacteria makes them resistant to pathogenic strains.
Mice infected with a pathogenic strain of bacteria can spread the infection to other mice.

More Questions

TLS Online TPP Program

#Question id: 10321

#Unit 1. Molecules and their Interaction Relevant to Biology

The human blood groups (O, A, B) are determined in part by the oligosaccharide head groups of these glycosphingolipids. Which of the following is correct?

TLS Online TPP Program

#Question id: 12759

#Unit 10. Ecological Principles

As climate changes because of global warming, species? ranges in the northern hemisphere may move northward. The trees that are most likely to avoid extinction in such an environment are those that

TLS Online TPP Program

#Question id: 1291

#Unit 4. Cell Communication and Cell Signaling

Which of the following is NOT true regarding matrix metalloproteases?

TLS Online TPP Program

#Question id: 23784

#Unit 7. System Physiology – Animal

What happens when rod cells are exposed to light?

TLS Online TPP Program

#Question id: 19796

#Unit 12. Applied Biology

The toxicity of cry protein toxins can be increased by the following approaches

1. Site directed mutagenesis within the toxin encoding region

2. Production of hybrid cry genes by fusing selected toxin domains of two or more different cry genes

Which of the following approaches could be correct?