Question 1
all living organisms contain carbon atoms. which of the following is an important characteristic of carbon?
question 1 options:
carbon atoms are highly reactive and form unstable bonds with any available atom.
carbon atoms can bond with any other atom, but they cannot form bonds with other carbon atoms
carbon atoms are very stable and do not easily form bonds with other atoms
carbon atoms can bond with many other kinds of atoms to form very stable molecules.
question 2
any chemical that contains carbon bonded to at least one other atom, usually hydrogen, is known as a
question 2 options:
carbohydrate
fatty acid
organic molecule
question 3
how many valence electrons are generally needed to fill the outer shell of most atoms?
question 3 options:
4
6
8
question 4
the macromolecules in biochemistry are proteins, carbohydrates, lipids and nucleic acids. what main elements do all of have in common?
question 4 options:
carbon and sulfur
carbon and hydrogen
oxygen and nitrogen
oxygen and phosphorus