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