Biology: The Dynamics of Life, California Edition

Section 3: Life Substances

Life Substances

1.
Which of these is considered to be one indicator of a person's risk of heart disease?
A)low HDL levels
B)the ratio of HDL to LDL
C)high LDL levels
D)the ratio of LDL to HDL
2.
Which organ in a mammal is responsible for storing glycogen?
A)bladder
B)lungs
C)liver
D)brain
3.
Which of these is a protein?
A)table sugar
B)nucleic acid
C)a fingernail
D)wax
4.
Which of these elements is NOT part of a carbohydrate molecule?
A)hydrogen
B)oxygen
C)carbon
D)magnesium
5.
Compounds that have different three-dimensional structures but identical chemical formulas are called __________.
A)acids
B)carbohydrates
C)isomers
D)enzymes
Glencoe Online Learning CenterScience HomeProduct InfoSite MapContact Us

The McGraw-Hill CompaniesGlencoe

Please read our Terms of Use and Privacy Policy before you explore our Web site. To report a technical problem with this Web site, please contact the Web Producer.