Which enzyme converts DHEA to androstenedione?

TLS Online TPP Program

#Question id: 5838

#Unit 8. Inheritance Biology

In the Holliday model describing recombination

TLS Online TPP Program

#Question id: 18747

#Unit 13. Methods in Biology

These are steps taken in carrying out the PCR reaction:

i) Attaching of primers by cooling

ii) Denaturation of strands

iii) DNA synthesis

iv) Heating

Which is the correct order?

(Mentioned from starting to ending the reaction)

TLS Online TPP Program

#Question id: 3820

#Unit 3. Fundamental Processes

Meselson and Stahlʹs experiments involved growing E. coli on a medium containing 15N (heavy nitrogen) which increased the density of the bacterial DNA. Cells were then grown on a medium containing only 14N. DNA samples were obtained for analysis after one, two and three rounds of replication (generations) and centrifuged on a density gradient. The double-helical DNA forms bands in the gradient depending on its density. How many bands did Meselson and Stahl see after two generation of cells were grown on the 14N medium?

TLS Online TPP Program

#Question id: 17287

#Unit 13. Methods in Biology

Consider the following grouped frequency distribution : 

What is mean deviation about the median ?  

TLS Online TPP Program

#Question id: 27489

#Unit 1. Molecules and their Interaction Relevant to Biology

At equilibrium in aqueous solution which form of sugar will be dominating