I’m not entirely sure about what you’re asking but chargaff’s rule is the thing that states that the amount of each “letter” in DNA is equal to its pair. Guanine (g) pairs with cytosine (C) and the same with adenine(A) and thymine (T). I’m sorry my answer is so vague, but I hope it helps a little!
Answer:
Ways HIV Cannot Be Spread
Saliva, tears, or sweat that is not mixed with the blood of a person with HIV. Shaking hands; hugging; sharing toilets; sharing dishes, silverware, or drinking glasses; or engaging in closed-mouth or “social” kissing with a person with HIV. Drinking fountains.
Explanation:

<h3>American culture is derived from some other form found elsewhere in the world. For example, the birth of cinema, as well as its radical development, can largely be traced back to the United States. In 1878, the first recorded instance of sequential photographs capturing and reproducing motion was Eadweard Muybridge's series of a running horse, which the British-born photographer produced in Palo Alto, California, using a row of still cameras. Since then, the American film industry, centered in Hollywood, California, has had a profound effect on cinema across the world. Other areas of development include the comic book and Disney's animated films, which saw widespread popularity and influence, especially in Japanese anime and manga and Chinese animation and manhua.</h3>
hmmm....i don't even know the answer to your question.