WorksheetsChemistry for Biology Review
Total questions: 20
Worksheet time: 25mins
Which substance is not part of a nucleotide?
phosphate
base
sugar
water
Why do cells contain both macromolecules and small carbon compounds?
Which statement is not true about H2O?
It has a pH of 7.0.
It is composed of ionic bonds.
It is a good solvent.
It is composed of polar molecules.
Which statement is true of chemical equations?
Reactants are on the right.
Products are on the right.
Reactants have fewer atoms than products.
Products have fewer atoms than reactants.
Which process changes a chlorine atom into a chloride ion?
Proton gain
Electron gain
Proton loss
Electron loss
The gecko is a reptile that climbs on smooth surfaces using van der Waals forces to adhere to the surface. How is this more advantageous than covalent interactions?
Activation energy is
energy that speeds up a reaction
energy that is created by a chemical reaction
energy required to start a reaction
energy that binds substances together
What is a radioactive isotope?
A substrate is
a substance that binds to an enzyme
a substance formed by a chemical reaction
a protein that speeds up a reaction
a substance that initiates a reaction
What joins amino acids together?
peptide bonds
hydrogen bonds
van der Waals forces
ionic bonds
Why are hydrogen bonds so important for living organisms?
Which of the following is a substance that lowers the activation energy?
a reactant
a catalyst
a substrate
an ion
How do the isotopes of hydrogen differ?
the number of energy levels
the number of protons
the number of neutrons
the number of electrons
What are some uses of radioactive isotopes?
A(n) (a) is a protein that speeds up a reaction.
A(n) (a) is a substance that produces OH- ions when dissolved in water.
Which elements are always found in amino acids?
nitrogen
phosphorus
carbon
oxygen
hydrogen
In which of the following are bonds broken and new bonds are formed?
chemical reactions
elements
isotopes
polar molecules
A(n) (a) is a substance formed by a chemical reaction.
A(n) (a) is a pure substance that cannot be broken down by a chemical reaction.
