Nucleic acids are made up of nitrogen bases, sugars, and phosphates.
Answer
The random motion of molecules occurs when they are placed in any container any open space, they have freedom to move to and fro as well as from one point to another. The random movement of molecules do not needs any energy inputs and it occurs on its own.
Diffusion:
If we talk about diffusion, it is a process in which molecules move from an area of higher concentration towards an area of lower concentration. For example: When we spray a fragrance in one corner of the room, after some time it will spread in whole room because molecules will move from a corner of high molecular concentration to the place where they are less in number. This process occurs freely and without any external input of energy.
Osmosis:
If we talk about osmosis it is also a diffusion of molecule but across a selectively permeable membrane like plasma membrane of living cells. Just like simple diffusion it also donot needs any external energy inpuy.
What is common in all?
That all three types of molecular movements do not need any energy inputs from system and it occurs on their own, therefore all are related.
Hope it help!
Answer: 43 x 10^6 CFU.
Explanation:
Plate count is a method used to determine the number of viable microorganisms in a sample. When the bacterial concentration is high, serial dilutions are carried out in a 1:10 sequence. <u>Then, the dilutions are successive dilutions keeping the dilution factor constant at each step</u>. Small aliquots of these dilutions are seeded in medium contained in a Petri dish where the bacteria grow forming colonies. Then the plates are incubated and colonies develop both within the agar and on the surface.
If the concentration of the seeded aliquot is too high, the bacteria will grow too much and it will not be possible to distinguish the colonies. <u>However, if the concentration is very low, the number of colony forming units (CFU) may be very low and thus can be counted</u>.
Colony forming units are calculated:
CFU = Number of colonies / (volume seeded on the plate * dilution).
The dilution is 10^-6, the number of colonies counted is 43, and usually the volume plated is 0.1 mL, so we replace that in the equation:
CFU= 43 / (0.1 mL * 10^-6)
CFU= 43000000 = 43 x 10^6