NURSING ANM AND GNM

NURSING EXAM QUESTIONS

MICROBIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
These methods would allow increase in the permeability of the cellular membrane, allowing compounds to easily diffuse, except?
A
deficiency in biotin
B
modifications of temperature
C
use of surfacace acting agents
D
use of penicillin
Explanation: 

Detailed explanation-1: -Electroporation is a biophysical phenomenon in which cell membrane permeability is increased through externally applied pulsed electric fields. This membrane permeability increase is used for many applications in biotechnology, medicine and the food industry.

Detailed explanation-2: -Electroporation, or electropermeabilization, is a microbiology technique in which an electrical field is applied to cells in order to increase the permeability of the cell membrane, allowing chemicals, drugs, electrode arrays or DNA to be introduced into the cell (also called electrotransfer).

Detailed explanation-3: -They are semi-permeable, which means that some molecules can diffuse across the lipid bilayer but others cannot. Small hydrophobic molecules and gases like oxygen and carbon dioxide cross membranes rapidly. Small polar molecules, such as water and ethanol, can also pass through membranes, but they do so more slowly.

Detailed explanation-4: -Membranes are semi-permeable. At these temperatures, the membrane is also semipermeable. As temperatures increases, the kinetic energy of the phospholipids also increases, which increases their movement. This increase in movement leads to an increase in permeability of the membrane.

There is 1 question to complete.