Liquid Biopsy-1

Which of the following can originate from both cancer or normal cells?

• ctDNA

• cfDNA

• gDNA

• CTC

ctDNA is usually very stable.

• TRUE

• FALSE

ctDNA is more stable in plasma than serum.

• TRUE

• FALSE

How long you can keep the blood in an EDTA tube after collection in room temperature for ctDNA analysis?

• 2-4 hours

• 5-6 hours

• no more than 1 hour

• 14 days

In which temperature the plasma needs to be kept if it needs to be stored for long time?

• -20° C

• Room temperature

• -60° C

• -80° C

Which of the following technique is used for untargeted ctDNA analysis?

• ddPCR

• qPCR

• Whole genome sequencing

• Targeted NGS

Which of the following inhibits PCR process?

• EDTA

• Heparin

• Plasma

• Serum

Which of the following is also known as skin biopsy?

• Needle biopsy

• Punch biopsy

• Endoscopic biopsy

• Excision biopsy

Which of the following is a blood anticoagulant?

• EDTA

• Heparin

• Both of them

• Neither of them

Which of the following provides absolute quantification of target DNA?

• PCR

• qPCR

• ddPCR

• WGS