Transformation efficiency is usually low, plants have been successfully transformed with large DNA fragments ranging from

TLS Online TPP Program

#Question id: 19459

#Unit 13. Methods in Biology

Phase-contrast microscopy depends on the refractive index of the region of specimen and generates image in which we see a pattern of 

TLS Online TPP Program

#Question id: 19460

#Unit 13. Methods in Biology

In phase contrast unobstructed light passes through a region of________ that both transmits only a small percentage of the light and changes its phase slightly.

TLS Online TPP Program

#Question id: 19461

#Unit 13. Methods in Biology

Phase-contrast microscopy is suitable for observing which kind of sample?

1. Single cells 

2. Group of cells

3. Thin cell layers

4. Thick cell layers

Which of the following options is correct?

TLS Online TPP Program

#Question id: 19462

#Unit 13. Methods in Biology

Splitting of incident light and then recombining them to observe interference pattern occurs in which type of microscopy?

TLS Online TPP Program

#Question id: 19463

#Unit 13. Methods in Biology

DIC microscopy is used for visualizing 

1. Minute details

2. Thick objects

3. Thin objects

4. Larger details

Which among the following options is correct?

TLS Online TPP Program

#Question id: 19464

#Unit 13. Methods in Biology

Which is the common fixative agent that crosslinks amino groups on adjacent molecules