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Chapter 6, Review 2
Test Description: Chemistry in Biology review 2
Instructions: Answer all questions to get your test result.
1) Which represents a formula for a chemical compound?
A
P
B
H
C
H2O
D
C
2) Which is the negatively charged particle located outside the nucleus of an atom?
A
silicon
B
electron
C
neutron
D
proton
3) which particle in the nucleus of an atom has a neutral charge?
A
carbon
B
electron
C
proton
D
neutron
4) If an atom has 7 electrons, how many are located in the second energy level?
A
5
B
3
C
2
D
7
5) One isotope of carbon is different from another how?
A
atomic number
B
number of protons
C
number of neutrons
D
number of electrons
6) Which is an example of a chemical reaction?
A
iron rusting
B
water evaporating
C
ice melting
D
sugar dissolving in water
7) What is the reactant when paper burns?
A
oxygen
B
carbon dioxide
C
water
D
fire
8) What is the product when an iron nail rusts?
A
oxygen
B
iron
C
iron oxide
D
water
9) How does an enzyme influence a biological reaction?
A
increases the kinetic energy of reactants and increases their tendency to collide
B
decreases the activation energy necessary to initiate the chemical change
C
increases the net energy difference between reactants and products
D
decreases the kinetic energy of reactants and helps them to go through chemical change more easily
10) Amino acids are the building blocks of which macromolecule?
A
lipid
B
DNA
C
protein
D
carbohydrate
*select an answer for all questions
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