TLS Online TPP Program

#Question id: 2063


In what way do the membranes of a eukaryotic cell vary?

#Biochemistry
  1. Phospholipids are found only in certain membranes.

  2. Certain proteins are unique to each membrane.

  3. Only certain membranes of the cell are selectively permeable.

  4. Some membranes have hydrophobic surfaces exposed to the cytoplasm while others have hydrophilic surfaces facing the cytoplasm.
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TLS Online TPP Program

#Question id: 38768

#Plant Biotechnology

Q. Statement I: PEG is negatively charged and can interact with cations such as Ca²⁺.
Statement II: Ca²⁺ ions can bind to negatively charged molecules on the plasma membrane, promoting membrane proximity.

TLS Online TPP Program

#Question id: 38769

#Plant Biotechnology

Q. Statement I: During the washing step, PEG may remove plasma membrane components bound to it.
Statement II: Removal of these components can destabilize membrane integrity and promote fusion of adjacent protoplasts.

TLS Online TPP Program

#Question id: 38770

#Plant Biotechnology

Q. Statement I: PEG-induced fusion is a consequence of controlled membrane damage and reorganization.
Statement II: Plasma membrane destabilization increases the likelihood of fusion between closely placed protoplasts.

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.