It depends on the bacteria and virus. Viruses can come through the nose, mouth, or an open cut. And bacteria can come through the nose, mouth, open cut, or from the GT tract. Why I say the GT track is because we have bacteria in our gut and if a certain type of bacteria got a chance to go somewhere else besides the gut then you could have an infection from this bacteria because it is not in its normal acidic conditions
Answer: DNA has three types of chemical component: phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine.
Explanation:
The answer is true if you use correct sources.
Nerve cells is the correct answer :)