Answer:
The answer is B and D.
Explanation:
PKA ( Protein Kinase A) is an enzyme which becomes active with the presence of cAMP molecules in the cell and the cAMP molecules need to bind to R subunits to become active which happens at a ratio of 1:2.
The example given in the question states that the Ro sububit can bind to 8 molecules of cAMP rather than the conventional 2.
This means that the activation of the Ro subunits is harder than the activation of R subunit because of the requirement of higher cAMP concentrations.
B is correct, full activity of PKA with Ro subunits needs a higher concentration of cAMP.
Because Ro binds to eight units of cAMP, the dynamic range of activity of PKA with Ro is going to be over a wider range of cAMP concentration.
I hope this answer helps.
Answer:
d. 2x.
Explanation:
At metaphase the DNA chromatides are duplicated. This explains that if in G1 phase of the cell cycle the DNA content is x, then the content in metaphase of meiosis I is 2x.
Answer:
Hantavirus pulmonary syndrome refers to a contagious disease featured by the flu-like signs, which can advance briskly to the possibly life-threatening inhalation issues. Many kinds of hantaviruses can lead to the syndrome. Many kinds of rodents can act as the vector for the virus, however, it is primarily caused by the deer mouse.
One can get infected with the condition mainly by inhaling air infested with hantaviruses, which are shed in the droppings and urine of the rodent. The scientists can assist in controlling the condition by offering ways to monitor the population of rodents. As the treatment choices are confined, the best defense against the condition is to prevent rodents and their territories.
