Summary Bio 181 Exam 2: Exam Review Exam Q & As (Verified CORRECT ANSWERS 2026 RATED A+

Bio 181 Exam 2: Exam Review Exam Q
& As (Verified CORRECT ANSWERS
2026 RATED A+
Grow H. pylori in a test tube with a glycoprotein that has its terminal NAG removed. - CORRECT
ANSWERS Refer to the paragraph about Kawakubo's group. Kawakubo's group
created a glycoprotein with a terminal NAG (i.e., a protein with NAG attached to its end). Their
hypothesis is that the terminal NAG, and not the protein component, is responsible for the damage to
the cell wall in H. pylori. What would be the most appropriate control for testing this hypothesis?



Their ring structures differ in the location of a hydroxyl group. - CORRECT ANSWERS
How do the α and β forms of glucose differ?



the number of carbon atoms - CORRECT ANSWERS Which of the following can
vary among monosaccharides?



monosaccharide - CORRECT ANSWERS A molecule with the chemical formula
C6H12O6 is probably a _____.



the position of the carbonyl group - CORRECT ANSWERS What is the difference
between an aldose sugar and a ketose sugar?



5 - CORRECT ANSWERS Glucose (C6H12O6) has a single carbonyl group (C=O) in
its linear form. Based on the number of oxygen atoms in glucose, how many hydroxyl groups (OH) would
you expect glucose to have?



hexose - CORRECT ANSWERS The molecule shown in the accompanying figure is
________.

,the amount of branching that occurs in the molecule - CORRECT ANSWERS
What is the major structural difference between starch and glycogen?



the size of their monosaccharide subunits - CORRECT ANSWERS Which of the
following do starch and cellulose have in common?



They can all form bonds between polymer chains that create parallel strands. - CORRECT ANSWERS
Which of the following structural features is common to cellulose, chitin, and peptidoglycan?



a peptide bond - CORRECT ANSWERS A glycosidic linkage is analogous to which
of the following in proteins?



glucose versus glycogen - CORRECT ANSWERS Which of these best reflects the
following relationship: monosaccharide versus polysaccharide?



Individual strands are joined by peptide bonds, a type of covalent bond. - CORRECT ANSWERS
Peptidoglycan forms sheets that stiffen the cell walls of bacteria. How is the formation of sheets
possible?



Evolutionarily, producing an enzyme to break down a sugar that will never be encountered is wasteful. -
CORRECT ANSWERS Dairy cattle were unknown in Thai culture until recently,
and 97 percent of Thai people are lactose intolerant as adults. Which explanation for such widespread
lactose intolerance is most likely correct?



chitin - CORRECT ANSWERS Which polysaccharide is an important component
in the structure of many animals and fungi?



C18H32O16 - CORRECT ANSWERS The molecular formula for glucose is
C6H12O6. What would be the molecular formula for a molecule made by linking three glucose
molecules together by dehydration reactions?

, starch - CORRECT ANSWERS The enzyme amylase can break glycosidic linkages
between glucose monomers only if the monomers are the α form. Which of the following could amylase
break down?



as a disaccharide - CORRECT ANSWERS Lactose, a sugar in milk, is composed of
one glucose molecule joined by a glycosidic linkage to one galactose molecule. How is lactose classified?



lactose - CORRECT ANSWERS All of the following are polysaccharides EXCEPT
_____.

lactose

cellulose

glycogen

chitin

amylopectin



glucose - CORRECT ANSWERS Which of the following is NOT a polymer?

starch

DNA

chitin

cellulose

glucose



chitin - CORRECT ANSWERS Which of the following polymers contain nitrogen?



carbohydrate - CORRECT ANSWERS Which of the following categories includes
all others in the list?

starch