Download Ch. 3.1 Formative Answer Key

Honors Bio: Ch. 3: Formative Assessment #1
Name: _______________________________________Per: _______ Date: ___________________
Learning Goal A: I can describe the unique qualities of carbon that allow it to bond with other elements to form large and complex
molecules, that are essential to the proper structure and function of cells.
Learning Goal B: I can explain that cells are composed of a small number of key chemical elements.
Learning Goal C: I can explain the structure and function of the functional groups.
Learning Goal D: I can explain the process of dehydration synthesis to form polymers and hydrolysis to form monomers.
_____ 1. Cause distinctive properties in organic molecules
D
A. polar covalent bond
_____ 2. Simple organic molecules that are hydrophobic E
B. nonpolar covalent bond
_____ 3.Equal sharing of electrons between atoms
C. isomers
B
_____ 4. Unequal sharing of electrons between atoms A
D. functional groups
_____ 5. Molecules with same chemical formula
E. hydrocarbons
C
but different molecular structures
6. List the 7 key elements that make up the organic macromolecules. CHNOPS (Carbon, Hydrogen,
Nitrogen, Oxygen, Phosphorus, Sulfur)
7.
Chemical Formula: C4H10
Chemical Formula: C4H10
These hydrocarbons are isomers.
8. Write the chemical formula or name of the functional groups listed below.
Learning Goals A-C
Hydroxyl
-OH
Suflhydryl
-SH
Carbonyl
-C=O
Carboxyl
-C=O-OH
Amino
-NH2
Phosphate
-PO4-
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Honors Bio: Ch. 3: Formative Assessment #1
9. What allows carbon atoms to be the basis of all organic macromolecules?
a. it has a large atomic mass
b. it has many isotopes
c. its bonding ability
d. it only has 4 protons
10. Draw a 5 carbon hydrocarbon that has one double bond. What is the molecular formula of this
molecule?
HHH HH
H-C-C-C=C-C-H
C5H10
HH
H
11. Describe the effects of changing or adding a functional group to a hydrocarbon.
Gives the molecule different chemical properties. For example, it can change it from a liquid to a gas or it
can change it from being hydrophilic to hydrophobic. If the chemical properties change, so does its
biological function.
12. Circle and label the functional groups present in the molecule picture below.
amino
carboxyl
13. The process below is Hydrolysis.
For the following statements, indicate if it is describing dehydration synthesis (D) or hydrolysis (H).
Learning Goals A-C
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Honors Bio: Ch. 3: Formative Assessment #1
14. Water is used to break bonds between monomers. H
15. Water breaks up, forming –H and –OH groups on separate monomers. H
16. Connects monomers to form a polymer. D
17. How many water molecules are formed when linking 10 monomers together? 9
18. The building blocks of polymers are called monomers
19. Large molecules built by linking repeating subunits are called polymers
20. Both dehydration synthesis and hydrolysis require enzymes to be present to speed up (catalyze) the
chemical reaction.
Learning Goals A-C
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