Yes, because they are proper nouns.
Examples:
Protease
Amylase
Lipase
Cellulase
Yes.Example: Titanic
i dont but most folks do capitalize the first letters at least of all the bigger words & even many of the smaller words in the names of plays
No it shouldn't be capitalized.
Rule 4. Capitalize titles when they are used before names, unless the title is followed by a comma. Do not capitalize the title if it is used after a name or instead of a name.from grammarbook.com
You only capitalize when you are using their actual names. So if you had two brothers and one sister you would write: "I have three siblings, Marco, Katerina and Jack."
Yes, in writing, you should capitalize the names of books.
No.
Yes you do.
Yes you do.
Yes.
no you do not capitalize the names of trees
yes because you capitalize all names
Yes.
Yes.
Capitalize them
Yes.Example: Titanic
yes