MCQs of Biology – Molecular Organization

which of the following holds atoms together in a molecule?

Potassium chloride consists potassium ions (K+) and chloride ions (CI) in a crystal. If potassium chloride is placed in water, what do you think happens?

Molecules are always moving. Some molecules move faster than others, _________ is a measure of their average velocity of movement:

Atoms combine in chemical reactions to form:

A substance that _______ is considered to be a chemical compound:

Which of the following is not a chemical reaction?

A Pepsi soft drink consists mostly of sugar dissolved in water, with some carbon dioxide gas makes it fuzzy and makes the pH less than 7. In chemical terms you could say that Pepsi is an aqueous solution, where water is the _________,sugar is a ________ and carbon dioxide makes the solution _______.