The Chemistry of Life Test Multiple Choice - Biology H
If carbon 12 has 6 protons, 6 electrons, 6 neutrons, how many are in the valence shell?
4 bonds
If we put salt into boiling water, what would it be considered?
A solution
If a chlorine atom has 17 neutrons and 18 protons what would we call it?
Chlorine 17 (C)
All enzymes have the same slope
False
What is true about a compound?
Forms new properties/Chemical properties are different
What makes up water?
H2O (2 hydrogen + 1 oxygen)
What happens if something loses an electron?
It becomes positive/positive ion
Which of the following is not true about chlorine?
It's not reactive (D)
When we prepare a culture, you stir the culture into it (water + living)
Living cells would be suspended in the solution
What does a catalyst do?
Lowers the activation energy
Which term does not apply to sodium chloride?
Molecule (A)
Which of the following is a substance formed by two or more elements
NaCl (table salt) compound Chemically joining substances = chemically
Why are water molecules polar?
Oxygen is slightly negative, hydrogen is slightly positive
Why would salt water be considered a solution?
Salt is the solute, water is the solvent
Amino acid is to protein
Simple sugar is to starch
How does the pH of stomach acid compare to the pH of oven cleaner?
Stomach acid = below 7 (acid) Oven cleaner = above 7 (base) The most acidic rainfall has a lower number
What electrons are available for bonding?
Valence electrons
If you have more OH than H
a base
A substance that speeds up a reaction
a catalyst
A protein is NOT
a monomer (simplest form of something)
Energy needed to get a reaction started
activation energy
Substance that has a pH of 6
an acid
If an atom contains 11 protons and 12 neutrons
atomic number = 11
In chemical reactions
atoms are rearranged
Enzymes affect the reaction in living cells by
changing the speed of the reaction
When isotopes have different # of neutrons
different mass/weight - what controls it is the neutrons
What do covalent bonds share?
electrons
What particles make up an atom?
electrons, protons, neutrons
What are found around the nucleus?
electrons/electron cloud
Adhesion
graduated cylinder curve, adhered to the sides
What can carbon atoms do?
have the ability to form to one another & form different structures (ring or line)
If an atom contains 3 protons, 4 neutrons, and 3 electrons, its mass
mass = 7
Solution
mixture of everything being spread out evenly within the solvent
4.22
more acidic
If a reaction in one direction releases energy
opposite direction will absorb
Since the shared electrons spend more time with the oxygen than the hydrogen
oxygen is slightly more negative
A macromolecule is big
proteins are made out of amino acids
What is CO₂ + H₂O considered in CO₂ + H₂O → H₂CO3
reactants
subatomic particles are
smaller than an atom
What is not a function of a protein?
storing genetic info
When hydrogen & oxygen form water, what's the product?
water
Chemical reactions that release energy
will explode
