TLS Online TPP Program

#Question id: 19866


Which of the following variants of PCR has been devised to increase the specificity of PCR without lowering the efficiency by variation annealing temperature?

#Life Sciences
  1. Site-directed-mutagenesis
  2. Touchdown PCR
  3. Anchored PCR
  4. Multiplex PCR
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TLS Online TPP Program

#Question id: 38771

#Plant Biotechnology

Q. Statement I: PEG can interact with both negatively and positively charged components of the plasma membrane.
Statement II: Such interactions reduce electrostatic repulsion between protoplasts.

TLS Online TPP Program

#Question id: 38772

#Plant Biotechnology

Q. Statement I: Protoplasts are isolated by enzymatic digestion of the cell wall using a combination of cellulase and pectinase.
Statement II: Cellulose microfibrils and pectic substances are major structural components of plant cell walls.

TLS Online TPP Program

#Question id: 38773

#Plant Biotechnology

Q.Statement I: The pH of the enzyme solution for protoplast isolation is maintained between 4.7 and 8.0.
Statement II: Enzymes involved in cell wall degradation show activity only at neutral pH.

TLS Online TPP Program

#Question id: 38774

#Plant Biotechnology

Q. Statement I: Protoplast isolation is usually carried out at a temperature range of 25–30°C.

Statement II: This temperature range supports optimal enzyme activity and maintains protoplast viability.


TLS Online TPP Program

#Question id: 38775

#Plant Biotechnology

Q. Statement I: High osmotic concentration of the enzyme mixture is maintained using sorbitol or mannitol.
Statement II: Elevated osmoticum prevents protoplast bursting by balancing internal turgor pressure.

TLS Online TPP Program

#Question id: 38776

#Plant Biotechnology

Q. Statement I: Calcium chloride is added to the osmoticum during protoplast isolation.
Statement II: Calcium ions improve plasma membrane stability of protoplasts.