Ch 2 Chemistry of Life Review

What is an atom?

• Basic unit of matter

• Has a positive charge and is found in the nucleus

• Contains different numbers of neutrons

• Has a neutral charge and can be found in the nucleus

A solution has a pH of 4. What is this solution?

• Neutral

• Acidic

• Basic

• None

Blood is an example of what type of mixture?

• Solvent

• Solution

• Suspension

• Solute

What is the mixture when ions are gradually dispersed in water?

• Suspension

• Solute

• Solvent

• Solutions

Carbon, Hydrogen, Oxygen, and Nitrogen are the atoms that make up which organic compound?

• Carbohydrates

• Nucleic Acids

• Lipids

• Proteins

Substrates bind to what on an enzyme in a chemical reaction?

• Reactant

• Active Site

• Activation Energy

• Product

Without enzymes, how would this affect the chemical reactions of living things?

• Would occur too slowly to be effective, and life could not function

• Nothing would happen and continue as normal

• Activation energy would be lower making chemical reactions faster

• Activation energy would be higher making chemical reactions faster

Which subatomic particle has a neutral charge?

• Atom

• Proton

• Neutron

• Electron

What is an isotope?

• atoms of the same element that have different numbers of protons

• atoms of the same element that have different numbers of neutrons

• atoms of the same element that have different numbers of electrons

• atoms of the same element that have the same number of neutrons

Ionic bonds are...

• the transfer of electrons from one atom to another

• electrons are shared between atoms

• happen only in isotopes

• happens in water molecules