Yes. It really should have been refrigerated before opening, too.
Yes you will need to refrigerate after opening, but it doesn't need to be refrigerated if still sealed.
doe
No.
It may not have to be refrigerated after opening - but it will probably retain it's moisture and flavor better if it is. If the bag recommends refrigerating after opening, then do so.
No - unless the label states "keep refrigerated" which should mean that it was in the refrigerated case when you purchased it.
Yes. Homemade marinade should be refrigerated, and purchased marinade should be refrigerated after opening.
Yes. Homemade marinade should be refrigerated, and purchased marinade should be refrigerated after opening.
Yes, generally hummus is sold as a fresh food.
I don't think so... I've been eating beef sticks for years right out of the stick and nothing has happened to me!
I would suggest you refrigerate the opened container. If it was in the refrigerated section when you bought it, keep it refrigerated. If it was not in the refrigerated section, check the label for instructions like "refrigerate after opening". Absent those instructions, refrigeration would probably help protect flavor even if food safety might not be an issue.
No, but it should be kept in a cool dry location.