The point at which the toxin would interrupt normal cell signalling in the pathway is the signal amplification.
This is because of the G-protein uncoupling and inhibition of signal amplification by pertusis toxin. Pertusis toxin released by the bacteria Bordetella pertusis and prevents signal that is amplifying from the protein. The G-protein coordinates the interaction between membrane bound receptor proteins and the effector proteins involved in the intracellular signalling. The toxin promotes the uncoupling of this heterotrimetric protein and also inhibits the amplification thus preventing the interaction of the receptor proteins and the second messengers.
Answer:
D
Explanation:
The vehicles have the same amount of kinetic energy because they are travelling at the same speed. There is a great difference in their masses but their speed is same. Kinetic energy of a body depends on both mass and velocity. If the mass of an object increases, its kinetic energy also increases and vice versa while on the other hand, if we doubles the speed of an object its kinetic energy increases four times so we can conclude that objects having same speed leads to same kinetic energy.
1)<span>Under the pressure of its own weight and the forces of gravity, a glacierwill begin to move, or flow, outwards and downwards. Valley glaciers flow down valleys, and continental ice sheets flow outward in all directions.
2)</span> at the shoreline, wind causes waves which contributes to significant erosion
hope it helps
Answer:
The part of the dead leaf cells where the cellulase acts is in the cell wall.
Explanation:
An important component of the plant cell wall is cellulose, with a proportion ranging from 40 to 50%, which provides protection and stability to the cells.
Cellulase, present in herbivorous animals and soil microorganisms, is an enzyme that is responsible for the degradation of cellulose. <u>Cellulase acts on the cell wall of dead plant tissue cells, including leaves</u>.
Answer:
<h2>
Hershey and Chase conducted a series of experiments in order to prove that DNA is the genetic material.</h2>
Explanation:
In this experiment, sulphur-35 and phosphorous-32 were used to radioactively label protein and DNA respectively. The bacteriophage (viruses that infects the bacteria) were allowed to infect the <em>E. coli </em>and it was found that bacterial pellets contains P-32 in their DNA and not S-35. This indicates suphur is not found in DNA, it is present in protein. This experiments proves that DNA is the genetic material and not protein.
So, the correct option is A.
