Unit 1 Test Review - NOS and Chemistry of Life

When is an ionic bond formed?

• when electrons are shared

• when protons are shared

• when atoms gain or lose electrons and become oppositely charged and attracted to each other

• when atoms gain or lose a proton and become oppositely charged and attracted to each other

Which of the following solutions has the highest Hydrogen ion concentration?

• a solution with a pH of 1

• a solution with a pH of 4

• a solution with a pH of 7

• a solution with a pH of 10

Atoms that share electrons are

• in a covalent bond

• in an ionic bond

• are usually salts

• always metals

What are the reactants in this chemical equation?

• CH₄ and 2O₂

• carbon and oxygen

• CO₂ and 2 H₂O

• water and methane

What are the 4 types of carbon-based molecules in organisms?

• carbohydrates, lipids, fatty acids, and monomers

• polymers, monomers, acids, bases

• adhesion, cohesion, evaporative cooling, and high specific heat

• nucleic acids, proteins, lipids, and carbohydrates

What are proteins made of?

• amino acids

• monosaccharides

• nucleic acids

• fatty acids

Which carbon-based molecule includes sugar and starches?

• carbohydrates

• lipids

• proteins

• nucleic acids

What are the products in this chemical reaction?

• calcium and oxygen

• Ca and CaO

• 2Ca and O₂

• 2CaO

Which type of carbohydrate is this?

• monosaccharide
• disaccharide
• polysaccharide
• glyceride

Plants store glucose in the form of

• starch
• glycogen
• cellulose
• chitin