Module 6 Chemistry In Biology

Question 1

Atom

Answer 1

Building block of matter contains neutrons protons and electrons

Question 2

Nucleus

Answer 2

Center of an atom contains neutrons protons and neutrons

Question 3

Proton

Answer 3

Tiny atomic particle that has mass and a positive electric charge.

Question 4

Neutron

Answer 4

Particle without a charge

Question 5

Electron

Answer 5

Tiny atomic particle with little mass and a negative electric charge

Question 6

Element

Answer 6

Natural or artificial substances that cannot be broken down into simpler substances by physical or chemical means.

Question 7

Isotopes

Answer 7

Two or more atoms of the same element having different t numbers of neutrons.

Question 8

Compounds

Answer 8

Substances composed of atoms of two or more different elements that are chemically combined.

Question 9

Ion

Answer 9

Atom that is negatively or positively charged because it has lost or gained one or more electrons.

Question 10

Ionic bond

Answer 10

Electrical attraction between two oppositely charged atoms or groups of atoms.

Question 11

Covalent bond

Answer 11

Attraction of two atoms for a shared pair of electrons that holds the atoms together.

Question 12

Molecule

Answer 12

Compounds whose atoms are held together by covalent bonds

Question 13

Chemical reaction

Answer 13

Change of one or more substance into other substances.

Question 14

Reactant

Answer 14

Substances that exists before a chemical reaction starts left side of arrow

Question 15

Product

Answer 15

Substances formed by a chemical reaction right side of arrow

Question 16

Activation energy

Answer 16

Minimum amount of energy needed for reactants to form products in a chemical reaction.

Question 17

Catalyst

Answer 17

Something that stimulates activity among people or forces.

Question 18

Enzyme

Answer 18

Protein that speeds up a biological reaction by lowering activation energy

Question 19

Substrate

Answer 19

Reactant where enzyme binds

Question 20

Active site

Answer 20

Specific place where a substrate binds to an enzyme.

Question 21

Polar molecules

Answer 21

Molecule with oppositely charged regions

Question 22

Van deer waals forces

Answer 22

Attractive forces between molecules

Question 23

Hydrogen bond

Answer 23

Forms when the positive ends of some water molecules are attracted to the negative ends of other water molecules

Question 24

Mixture

Answer 24

Combination of two or more different substances in which each substance keeps its individual characteristics.

Question 25

Solution

Answer 25

Homogeneous mixture whose components Connor be distinguished and can be classified as liquid gaseous, solid or a combination

Question 26

Solvent

Answer 26

Substances that another substance is dissolved in

Question 27

Solute

Answer 27

Substance dissolved in a solvent

Question 28

Acid

Answer 28

Solution containing a substance that produces hydrogen ions in water

Question 29

Base

Answer 29

Substance that produces hydroxide ions in water

Question 30

Buffer

Answer 30

Mixture that can react with an acid or a base to maintain the pH within a specific range.

Question 31

Macromolecules

Answer 31

Large molecules formed by joining smaller organic molecules together.

Question 32

Polymers

Answer 32

Large molecules formed from smaller, repeating units of identical or neo, identical compounds, linked by covalent bonds