Campbell Biology Chapter 5 Practice Test
Questions With Verified Answers
What is the process by which monomers are linked together to form polymers? (eText Concept
5.1)
* coiling
* protein formation
* hydrolysis
* monomerization
* dehydration or condensation reactions - Answers✔dehydration or condensation reactions
in a hydrolysis reaction, _____, and in this process water is _____. (eText Concept 5.1)
* a monomer is broken up into its constituent polymers ... produced
* monomers are assembled to produce a polymer ... produced
* monomers are assembled to produce a polymer ... consumed
* a polymer is broken up into its constituent monomers ... produced
* a polymer is broken up into its constituent monomers ... consumed - Answers✔polymer is
broken up into its constituent monomers ... consumed
In hydrolysis water is utilized as a reactant; water is not a product of a hydrolysis reaction.
The type of bond that forms to join monomers (such as sugars and amino acids) into polymers
(such as starch and proteins) is a(n) _____ bond. (eText Concept 5.1)
ALL RIGHTS RESERVED.
* ionic
* van der Waals
* peptide
* covalent - Answers✔covalent
Which of the following is a polymer? (eText Concept 5.2)
cellulose, a plant cell wall component
fructose, a component of sucrose
glucose, an energy-rich molecule
triacylglycerol, or fat
testosterone, a steroid hormone - Answers✔cellulose, a plant cell wall component
Correct. The polysaccharide cellulose is a major component of plant cell walls. It is a polymer
composed of many glucose monomers joined together by glycosidic linkages.
Cellulose is a _____ made of many _____. (eText Concept 5.2)
* polypeptide ... monomers - Answers✔polymer ... glucose molecules
Correct. Cellulose is a polysaccharide and therefore a polymer, constructed from many
monosaccharide glucose monomers.
Generally, animals cannot digest (hydrolyze) the glycosidic linkages between the glucose
molecules in cellulose. How then do cows get enough nutrients from eating grass? (eText
Concept 5.2)
* Cows and other herbivores are exceptions and make some cellulose-digesting enzymes.
* They have to eat a lot of it.
ALL RIGHTS RESERVED.
* Microorganisms in their digestive tracts hydrolyze the cellulose to individual glucose units.
* The flat teeth and strong stomach of herbivores break the cellulose fibers so that the cows get
enough nutrition from the cell contents.
* All of the listed responses are correct. - Answers✔Microorganisms in their digestive tracts
hydrolyze the cellulose to individual glucose units.
Correct. Cows have digestive chambers populated by microorganisms that can produce certain
hydrolytic enzymes that cows cannot. The enzymes hydrolyze (digest) the cellulose polymer into
glucose monomers.
In what polysaccharide form do plants store glucose to be available later as an energy source?
(eText Concept 5.2)
* protein
* starch
* glycogen
* cellulose
* fatty acids - Answers✔starch
Which of the following carbohydrate molecules has the lowest molecular weight? (eText
Concept 5.2)
* glucose
* cellulose
* sucrose
* chitin
* lactose - Answers✔glucose
Which of the following molecules is a monosaccharide? (eText Concept 5.2)
* C25H43O8
* C22H49O10N5
* C51H98O6
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