Chemistry Concepts and Applications

Chapter 19: The Chemistry of Life

Chapter Test Practice

1
Which amino acid is considered the simplest?

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A)glycine
B)alanine
C)phenylalanine
D)cysteine
2
Enzymes are proteins that __________ reactions

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A)slow down
B)stop
C)reverse
D)speed up
3
Lactic acid fermentation occurs in the absence of __________.

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A)glucose
B)oxygen
C)ADP
D)carbon
4
__________ was the first biomolecule synthesized outside of a living cell.
A)benzene
B)ethanol
C)formaldehyde
D)urea
5
__________ function as biological catalysts, make up your muscles and tendons, and help transport substances in your blood.
A)Carbohydrates
B)Esters
C)Proteins
D)Sugars
6
Carbohydrates are made up of these three elements.
A)carbon, hydrogen, and oxygen
B)carbon, calcium, and hydrogen
C)carbon, phosphorus, and hydrogen
D)carbon, nitrogen, and oxygen
7
Glucose, fructose, and ribose are __________.
A)disaccharides
B)monosaccharides
C)polymers
D)proteins
8
Lipids serve to store energy and __________ in the body.
A)digest carbohydrates
B)form membranes
C)form bones
D)provide calcium
9
Adenine, cytosine, guanine, thymine, and uracil are five different __________ found in nucleotides.
A)nitrogen-containing bases
B)phosphate groups
C)sugars
D)nucleic acids
10
An __________ atom is at the center of the hemoglobin molecule.
A)carbon
B)copper
C)iron
D)nitrogen
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