Chapter 2 Test - Biology
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Click on the best answer for the multiple choice. Choose two essay questions and answer in complete sentences, paragraph format. Answer the third for extra credit. You will have 45 minutes to complete the test. good luck!
- 1.Explain a situation in which the products in a chemical reaction lose energy. Include activation energy.
- 2.Describe the four major macromolecules. Include the monomer and polymer names and one major function of each. Provide examples.
- 3.Describe how the pH scale works.
- 4.The negatively charged particle in an atom is called the
- A.
Proton.
- B.
Neutron
- C.
Electron
- D.
Positron
- 5.Two or more atoms that have the same number of protons but different numbers of neutrons are called
- A.
Elements.
- B.
Compounds.
- C.
Molecules.
- D.
Isotopes.
- 6.An ionic bond is formed by
- A.
The sharing of electrons.
- B.
The transferring of electrons.
- C.
The sharing of protons.
- D.
The transferring of protons.
- 7.A covalent bond is formed by
- A.
The sharing of electrons.
- B.
The transferring of electrons.
- C.
The sharing of neutrons.
- D.
The transferring of neutrons.
- 8.True or False: a molecule is made of only ionic bonds.
- A.
True
- B.
False
- 9.A radioactive isotope has
- A.
An unstable nucleus.
- B.
An unstable electron.
- C.
An unstable personality.
- D.
A stable electron cloud.
- 10.In an element all of the atoms are
- A.
The same type.
- B.
Of different types.
- C.
Mixed in a pot like a stew.
- D.
Organized by size.
- 11.An isotope has different numbers of ___________ and the same numbers of ___________.
- A.
Protons, electrons
- B.
Electrons, protons
- C.
Neutrons, protons
- D.
Protons, neutrons
- 12.In a suspension, the particles are
- A.
Evenly distributed throughout the mixture.
- B.
Often unable to completely mix and will drift to the bottom of the container.
- C.
Lumped into one corner of the container, but are invisible.
- D.
Able to change shape to look like solvent particles.
- 13.The beading of water is due to
- A.
Adhesion.
- B.
Specific heat.
- C.
Cohesion.
- D.
Boiling point.
- 14.What phenomenom explains water's high cohesion, adhesion, and heat capacity?
- A.
Biological processes
- B.
Proteins
- C.
Sugar
- D.
Hydrogen bonding
- 15.In a container full of water molecules, hydrogens are attracted to the _________ of other water molecules.
- A.
Hydrogens
- B.
Protons
- C.
Oxygens
- D.
Positive attitude
- 16.The pH scale depends upon the _____________ concentration of a solution.
- A.
Hydroxide ion
- B.
Water ion
- C.
Electron
- D.
Hydrogen ion
- 17.______________ produces hydroxide ions in a solution.
- A.
Acids
- B.
Bases
- C.
Anxiety
- D.
Salts
- 18.In order to stabilize the pH of a solution, a scientist can use a weak acid or base as a
- A.
Polymer.
- B.
Monomer.
- C.
Buffer.
- D.
Salt.
- 19.The monomer of a starch (complex carbohydrate) is
- A.
Glucose.
- B.
Amino acid.
- C.
Glycerol.
- D.
Nucleic acid.
- 20.Which of the following is not a true polymer?
- A.
Nucleic acids
- B.
Proteins
- C.
Lipids
- D.
Carbohydrates
- 21.In which of the following groups are enzymes normally considered?
- A.
Carbohydrates
- B.
Lipids
- C.
Proteins
- D.
Nucleic acids
- 22.Enzymes speed up the rate of reaction by
- A.
Increasing the activation energy.
- B.
Releasing energy.
- C.
Gaining energy.
- D.
Lowering the activation energy.
- 23.The reactants in an enzyme catalyzed reaction are called
- A.
Products.
- B.
Substrates.
- C.
Acids.
- D.
Bases.
- 24.The _________________ is the term used to describe the combination of substrates bound to the enzyme.
- A.
Enzyme-product substrate
- B.
Enzyme-substrate complex
- C.
Complex substrate-product
- D.
Substrate-product complex
- 25.There are several ways to regulate an enzyme's activity. Which of the following does not change the shape of an enzyme's active site?
- A.
A false substrate
- B.
Boiling
- C.
Adding an acid
- D.
Adding a base
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