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Worksheets6-Chemistry in Biology
Total questions: 31
Worksheet time: 31mins
building block of matter
atom
cell
organelle
tissue
compound
pure substance formed when two or more different elements combine
electrical attraction between two oppositely charged atoms
center of an atom; contains neutrons and protons
particle without a charge in an atom's nucleus
proton
positively charged particle in an atom's nucleus
particle without a charge in an atom's nucleus
negatively charged particle that occupies space around an atom's nucleus
pure substance composed of only one type of atom; cannot be broken down into another substance by physical or chemical means.
molecule
compound whose atoms are held together by covalent bonds
pure substance formed when two or more different elements combine
atom that is negatively or positively charged because it has lost or gained one or more electrons
negatively charged particle that occupies space around an atom's nucleus
attractive forces between molecules.
van der Waals force
molecule
compound
isotope
process by which atoms in substances are reorganized into different substances.
chemical reaction
activation energy
substrate
active site
the starting substances in a chemical reaction
reactant
product
catalyst
substrate
enzyme
special proteins that are biological catalysts
the minimum amount of energy needed for reactants to form products
The specific location where a substrate binds on an enzyme.
process by which atoms in substances are reorganized into different substances.
molecules that have an uneven distribution of charge and have oppositely charged regions.
polar molecule
solution
acid
pH
a substance in which another substance is dissolved (i.e. water)
solvent
solute
acid
base
the substance that is dissolved in the solvent (i.e. salt or sugar)
solute
solvent
solution
mixture
substances that release Hydrogen ions (H+) when they are dissolved in water.
acid
base
solvent
solute
mixtures that can neutralize acids or bases to keep the pH within a particular range.
buffer
pH
polar molecule
solution
large molecules that are formed by joining smaller organic molecules together.
macromolecule
micromolecule
ions
polymers
protein
compounds made of amino acids.
complex macromolecules that transmit and store genetic information.
Compound composed of a ratio of 1 carbon :2 hydrogen :1 oxygen
molecules made mostly of carbon and hydrogen that make up fats, oils, and waxes.
True or False: Carbon is an example of an element from the Periodic Table.
True
False
True or False: Water (H2O) is an example of the element from the periodic table.
True
False
True or False: Atom is made up of
tiny subatomic particles called protons, neutrons, and electrons.
True
False
If electrons have negative charge and are found outside of the nucleus, how many electrons does the atom below have?
2
4
6
12
Ionic bonds form when
atoms share electrons
atoms lose protons
atoms lose or gain electrons
atoms gain protons
Select ALL of the examples of mixtures from the list below.
Coffee and cream
Sweet tea
Water
Table salt
Fruit salad
C-12, C-13 and C-14 are _________________ of each other
atoms
isotopes
elements
ions
Atoms which have the same number of protons but different numbers of neutrons are called what?
compounds
atoms
ions
isotopes
The energy needed to start a reaction is called ......
first energy
substitution energy
activation energy
start energy
If 5 grams of coffee is dissolved in 100 ml of water, what is the solute?
coffee
water
What is the pH of a base?
above 7
below 7
7
What is the substance an enzyme works on called?
acid
base
substrate
active site
What is the location on an enzyme where the substrate bonds called?
active site
activation energy
catalyst
antibody
What are the monomers of proteins?
amino acids
nucleotides
fatty acids and glycerol
monosaccharide
Which is NOT an example of a nucleic acid?
DNA
RNA
phospholipid
Which is NOT a part of a nucleotide?
amino acid
sugar
nitrogen base
phosphate
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