Answer:
The following is the formula to determine the size from minor spaces and ocular spaces on the stage micrometer:
Size = Number of minor spaces * 10 micrometer / Number of ocular spaces
A = Number of minor spaces is 2 and the number of ocular space is 1,
Size = 2 * 10 / 1 = 20 micro micrometer. Thus, the size of a bacterium is 20 micrometers.
B = Thus, it can be said that the size of the bacterium is almost 4 times bigger in comparison to a human red blood cell, which is 6 micrometers in diameter.
Answer: c. 0.15%
Explanation:
The blood alcohol concentration or BAC refers to the percentage of alcohol present in the bloodstream. The value of blood alcohol concentration of 0.15% is very high. It will affect the balance of voluntary muscles, walking and talking will also become difficult. The person will experience a severe increase in the rate of heart, the body temperature will rise, the person will experience irregular breathing and the bladder control will become weak.
The question is incomplete as it does not have the option which are provided in the attachment
Answer:
It is potential energy that can power ATP synthesis
Explanation:
Electron transport chain is considered the most important stage of the cellular respiration as it is the only stage during which a high amount of ATP is produced.
The electron transport through various protein complex where electrons lose its energy and are used to drive the outflow of the proton to the outside of the mitochondrial membrane.
When protons accumulate outside the membrane creates a proton gradient as a result of which the proton needs to enter the cell.
The protons enter through the ATP synthase where the potential energy of the proton is used to rotate the rotor and thus ATP is formed from the ADP.
Thus, the selected option is correct.
Answer:
Catalase
Explanation:
Catalase test is used to detect the presence of enzyme catalase.
Catalase is an enzyme that is formed by microorganism that lives in oxygen saturated environments so that there will be the break down of any toxic that comes with oxygen and hydrogen peroxide. This enzymes helps to differentiate catalase producing enzymes like staphylococci from bacteria that produce non-catalase like streptococci
Chemists can classify matter as solid, liquid, or gas. But there are other ways to classify matter, as well — such as pure substances and mixtures. Classification is one of the basic processes in science. All matter can be classified as either a pure substance or a mixture. A pure substance has a definite and constant composition — like salt or sugar. A pure substance can be either an element or a compound, but the composition of a pure substance doesn’t vary. Mixtures are physical combinations of pure substances that have no definite or constant composition — the composition of a mixture varies according to who prepares the mixture.
Although chemists have a difficult time separating compounds into their specific elements, the different parts of a mixture can be easily separated by physical means, such as filtration.
For example, suppose you have a mixture of salt and sand, and you want to purify the sand by removing the salt. You can do this by adding water, dissolving the salt, and then filtering the mixture. You then end up with pure sand.
Mixtures can be either homogeneous or heterogeneous:
A homogeneous mixture, sometimes called a solution, is relatively uniform in composition; every portion of the mixture is like every other portion.
For example, if you dissolve sugar in water and mix it really well, your mixture is basically the same no matter where you sample it.
A heterogeneous mixture is a mixture whose composition varies from position to position within the sample.
For example, if you put some sugar in a jar, add some sand, and then give the jar a couple of shakes, your mixture doesn’t have the same composition throughout the jar. Because the sand is heavier, there’s probably more sand at the bottom of the jar and more sugar at the top.
