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Name ___________________________________________________ Due Date ____________________ Per _________
BIOCHEMISTRY WS – CARBOHYDRATES, LIPIDS, PROTEINS
I. Matching – Each choice is used one time.
1. ________ Name for any chemical compound held together with covalent bonds
A. acid
2. ________ Polysaccharide found in exoskeleton of insects, cell walls of fungi
B. adhesion
3. ________ Substance with equal concentrations of H + and OH –
C. amino acids
4. ________ “Bad fat” composed of glycerol and 3 fatty acid tails; usually from animal source
D. base
5. ________ The breaking apart of a molecule by the addition of water
E. carbohydrates
6. ________ Polysaccharide found in plant cell walls; source of fiber for humans
F. cellulose
7. ________ Not a true bond; an attraction between two polar molecules
G. chitin
8. ________ Substance that increases OH – concentration when added to water
H. cholesterol
9. ________ Lipid found in cell membranes of all cells; 1 end is polar, other end is non-polar
I. dehydration synthesis
10. ________ “Many units”; any molecule made up of many similar building blocks
J. cohesion
11. ________ Has C=C on the fatty acid tails; liquid at room temp; from plant source
K. covalent bond
12. ________ Biomolecules composed of CHON; used for support, structure, movement
L. deoxyribose
13. ________ Polysaccharide; storage form of glucose in plants
M. unsaturated fat
14. ________ Property in which one water molecule sticks to another water molecule
N. glucose
15. ________ Disaccharide; monomers are glucose and fructose
O. glycogen
16. ________ Chemical bond in which electrons are transferred from one atom to another
P. hydrogen bond
17. ________ Polysaccharide; storage form of glucose in animals
Q. ion
18. ________Substance that increases H + concentration when added to water
R. ionic bond
19. ________Strong, stable bond in which atoms share electrons
S. isomer
20. ________Property in which water molecules stick to other surfaces
T. lactose
21. ________ Process that links two monomers; involves the net removal of water
U. lipids
22. ________ Molecules with the same chemical formula, but a different arrangement of atoms
V. maltose
23. ________ Biomolecule group that is non-polar, insoluble in water; CHO
W. molecule
24. ________ Monomers of proteins
X. hydrolysis
25. ________ Steroid found in cell membranes of all animal cells; also used in hormone production Y. organic
26. ________ Monosaccharide that is preferred energy source for human cells
Z. phospholipid
27. ________ Term used to describe any molecule that contains carbon
AA. polymer
28. ________ Disaccharide; monomers are glucose and glucose
BB. proteins
29. ________ C5 H10 O5; sugar component of our molecule of inheritance
CC. Saturated fat
30. ________ Any charged particle
DD. starch
31. ________ Disaccharide found in milk; monomers are glucose and galactose
EE. sucrose
32. ________ Group of biomolecules composed of CHO; always have ratio of 2H : 1O
FF. water
33. _______ Building block of a polymer
GG. monomer
II. Provide the missing information in the following table.
Substance
pH
Acid, Base, or Neutral?
34.
Saliva
6.2
Relative Strength?
(Circle one)
Strong
Weak
35.
Bleach
13.0
Strong
Weak
36.
Cola
2.5
Strong
Weak
37.
Water
XXXXX
III. Identification – Identify the following molecules as a carbohydrate (C), lipid (L), or protein (P).
40. ________
38. ________
39. ________
41. ________
42. ________
IV. Enzymes
Label the following diagram using the terms listed to the right.
enzyme
active site
substrate
product
True / False – If the statement is true, write “true” on the line provided. If the statement is false, change the
underlined, italicized word to make the statement true and write the correct word on the line provided.
______________________ 43. All enzymes are composed of lipids.
______________________ 44. Enzymes act as catalysts; that is, they trigger chemical reactions without being used up in
the reaction.
______________________ 45 An enzyme lowers the reaction energy for a reaction so the reaction occurs more easily
and quickly.
______________________ 46 Enzymes can only function within a narrow temperature and humidity range.
______________________ 47. An enzyme is substrate-specifc meaning each enzyme works for one specific reaction.