The commonly used heavy metals in staining for electron microscopy are.

1. Uranium

2. Gold

3. Lead

4. Osmium

5. Platinum

Which of the following option has correct combination?

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#Question id: 20400

#Unit 3. Fundamental Processes

There are four rules of parity given by Erwin Chargaff which of the following applies more closely to introns than exons

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#Question id: 18701

#Unit 13. Methods in Biology

PCR (polymerase chain reaction) is an excellent method of generating copies of target DNA. If a single piece of double stranded DNA (dsDNA) is put into a PCR machine, how many dsDNA segments will there be after 3 rounds?

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#Question id: 12213

#Unit 7. System Physiology – Animal

The gastric phase of gastric secretion accounts for about 60% of the acid response to a meal. Which of the following can virtually eliminate the secretion of acid during the gastric phase?

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#Question id: 1427

#Unit 4. Cell Communication and Cell Signaling

 In females, all the cells in a tumor have the same inactive X chromosome. The reason for this is that:

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#Question id: 7210

#Unit 5. Developmental Biology

Model for limb patterning by opposing gradients of retinoic acid (blue shading) and of FGFs and Wnts (pink shading). According to this graph, Which of the following statements are correct?