Practice Questions

TLS Online TPP Program

#Question id: 39848

Q. When performing a sequence alignment between two DNA or protein sequences, which of the following statements best describes the point at which shared ancestry can no longer be detected?

#Bio-Informatics

When the sequences contain any number of insertions or deletions (indels).
When the sequences have diverged to the point where the signal of homology is indistinguishable from random chance.
When the sequences show substitutions in more than 5% of the aligned regions.
When the sequences are of different lengths, making a global alignment impossible.

More Questions

#Question id: 37833

#Plant Biotechnology

#Question id: 37834

#Plant Biotechnology

#Question id: 37835

#Plant Biotechnology

#Question id: 37836

#Plant Biotechnology

Column A	Column B
1. Dry Heat	A. 121 °C at 15 PSI for 15–20 min
2. Autoclaving	B. 0.45 μm pore size membrane
3. Filter Sterilization	C. 160–180°C for 3 hours
4. Laminar Air Flow	D. HEPA filter (removes particles > 0.3 μm)

#Question id: 37837

#Plant Biotechnology

Column A (Method)	Column B (Material to Sterilize)
1. Surface Sterilization	A. Heat labile growth regulators (GA, Zeatin)
2. Filter Sterilization	B. Glassware and Teflon plastic ware
3. Dry Heat	C. Plant materials (explants, ovules)
4. Wiping with 70% Ethanol	D. Hands of operator and cabinet platform

#Question id: 37838

#Plant Biotechnology

Column A (Process)	Column B (Chemical/Agent Used)
1. Surface Sterilization	A. 95% Alcohol (followed by flaming)
2. Flame Sterilization	B. Sodium Hypochlorite / Mercuric Chloride
3. Cleaning Laminar Platform	C. 70% Ethyl Alcohol
4. Air Filtration	D. HEPA (High Efficiency Particulate Air)