You briefly expose bacteria undergoing DNA replication to radioactively labeled nucleotides. When you centrifuge the DNA isolated from the bacteria, the DNA separates into two classes. One class of labeled DNA includes very large molecules (thousands or even millions of nucleotides long), and the other includes short stretches of DNA (several hundred to a few thousand nucleotides in length). Which two classes of DNA do these different samples represent?

TLS Online TPP Program

#Question id: 18990

#Unit 13. Methods in Biology

A list of reporter or marker genes used in gene transfers in animal cells with reporter gene and their source match them correctly

I - Chloramphenicol acetyltransferase (CAT)	A - Herpes simplex virus (HSY)
II - Luciferase (lux)	B - Pacific jellyfish (Aequoria victoria)
III - Green fluorescent protein (GFP)	C - Bacteria, firefly
IV - Thymidine kinase (Tk)	D - E. coli transposon Tn9

TLS Online TPP Program

#Question id: 18991

#Unit 13. Methods in Biology

Which of the following is not true about High pressure liquid chromatography (HPLC)? 

TLS Online TPP Program

#Question id: 18992

#Unit 13. Methods in Biology

Which of the following is not an advantage of Syringe type pumps used in High pressure liquid chromatography?

TLS Online TPP Program

#Question id: 18993

#Unit 13. Methods in Biology

Which of the following is not true about solvent programming which is done in high performance liquid chromatography?

TLS Online TPP Program

#Question id: 18994

#Unit 13. Methods in Biology

Which of the following pulse damper takes up some amount of the pulsation energy which is released to provide smooth pressure without pulsations?

TLS Online TPP Program

#Question id: 18995

#Unit 13. Methods in Biology

Which of the following is not a characteristic of the syringe pump used in high pressure liquid chromatography?