When sufficient heat is applied, double-stranded DNA denatures into two single-stranded molecules as the heat breaks all of the hydrogen bonds. In an experiment, molecules of single-stranded DNA from species X are separately hybridized with putatively homologous single-stranded DNA molecules from five species (A-E). The hybridized DNAs are then heated, and the temperature at which complete denaturation occurs is recorded. Based on the data below, which species is probably most closely related to species X?

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#Question id: 23190

#Unit 13. Methods in Biology

If we want to view live cells which microscopy can be best used for this?

1. Structured illumination microscopy

2. Phase contrast microscopy

3. Scanning electron microscopy

4. Cryoelectron microscopy

Which of the following option has correct combination?

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#Question id: 871

#Unit 1. Molecules and their Interaction Relevant to Biology

According to ‘Energy–entropy phenomenon’ for protein folding correct combinations of possible conformations

1. Unfolded polypeptide	a. high-energy, high-entropy
2. Native conformation	b. low-energy, low-entropy
3. False energy minima	c. modest-energy, low-entropy

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#Question id: 18870

#Unit 13. Methods in Biology

Which element of the light microscope is in charge of regulating the amount of light that enters the viewing area?

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#Question id: 26522

#Unit 3. Fundamental Processes

Rpo I has =14 subunits, Rpo II has = 12 subunits, Rpo III has = 17 subunits, respectively but There are five common subunits among all these are

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#Question id: 12731

#Unit 13. Methods in Biology

Choose the correct codon for phenylalanine.