There is no grammatical reason to capitalize every word in a sentence. It may sometimes be done as someone's attempt at emphasis, but it is never grammatically correct.
no
You do not capitalize the word quarterback unless it is at the beginning of a sentence.
No you do not capitalize artist in a sentence
No - not unless it's the first word of the sentence.
No
Yes, you should capitalize the word after a comma in a sentence.
You do not capitalize chickenpox in a sentence. The exception is if the word is the first in the sentence.
no or at least not any more than i capitalize the word sentence in a paragraph
Yes, you always capitalize a day of the week.
Never. ANSWER: only if the word is the beginning word in the sentence.
Yes, you should capitalize the word "scurvy" if it is the first word in a sentence or if it is part of a proper noun or title.
no
No.
You do not capitalize the word quarterback unless it is at the beginning of a sentence.
No, the word lunch is not capitalized in a sentence. You would only capitalize it if it was part of a title (e.g. it was a word in a book title).
You capitalize the word "birthday" at the beginning of a sentence, and no other time.
No, "diabetes" is not capitalized unless it is the first word in a sentence or part of a proper noun.