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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
C
B
H2O
C
P
D
H
2) Which is the negatively charged particle located outside the nucleus of an atom?
A
electron
B
neutron
C
proton
D
silicon
3) which particle in the nucleus of an atom has a neutral charge?
A
carbon
B
proton
C
electron
D
neutron
4) If an atom has 7 electrons, how many are located in the second energy level?
A
2
B
3
C
5
D
7
5) One isotope of carbon is different from another how?
A
number of electrons
B
number of protons
C
atomic number
D
number of neutrons
6) Which is an example of a chemical reaction?
A
sugar dissolving in water
B
water evaporating
C
ice melting
D
iron rusting
7) What is the reactant when paper burns?
A
water
B
fire
C
carbon dioxide
D
oxygen
8) What is the product when an iron nail rusts?
A
water
B
iron
C
oxygen
D
iron oxide
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 kinetic energy of reactants and helps them to go through chemical change more easily
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
protein
B
carbohydrate
C
DNA
D
lipid
*select an answer for all questions
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