Sem1 Exam_CPBIO_The Chemistry of Life

What three subatomic particles make up atoms?

• compounds, quarks, quirks

• electrons, isotopes, protons

• electrons, neutrons, protons

• isotopes, neutrons, protons

A chemical __________ is a pure substance made entirely of one type of atom.

• blend

• compound

• element

• mixture

A __________ is made of two or more atoms of different elements that are chemically combined.

• compound

• nucleus

• proton

• reaction

The main types of chemical bonds are __________.

• covalent and hydrogenated

• covalent and ionic

• fluorine and ionic

• ionic and subliminal

Which end of the water molecule has a slightly positive charge?

• both ends

• neither end

• the hydrogen end

• the oxygen end

When water molecules stick to other water molecules, this is called __________.

• adhesion

• cohesion

• polar molecule

• solution

When salt is dissolved in water, water is the __________.

• reactant

• solute

• solution

• solvent

What are the four main groups of carbon-based molecules?

• amino acids, cholesterol, fatty acids, starches

• oils, polymers, polysaccharides, sugars

• cellulose, monosaccharides, sugars, triglycerides

• carbohydrates, lipids, nucleic acids, proteins

The process that changes one set of chemicals into a new set of chemicals is called a __________.

• chemical reaction

• physical reaction

• replacement reaction

• synthetic reaction

The energy needed to start a reaction is called the __________.

• activation energy 

• promoting energy

• reacting energy

• starting energy