Question 1

Which functional groups are present in all monosaccharides in their linear forms?

Accepted Answer

A carbonyl group and several hydroxyl groups

Question 2

Glucose and galactose are both hexoses. Which structural feature distinguishes galactose from glucose?

Accepted Answer

The orientation of the hydroxyl group on carbon 4

Question 3

What is the molecular formula for a molecule formed by linking three glucose molecules together by condensation reactions?

Accepted Answer

$$C_{18}H$$_{32}$$O_{16}$

Question 4

Which of the following best explains why enzymes that hydrolyze starch cannot hydrolyze cellulose?

Accepted Answer

The geometry of the bonds is different, and the shapes of enzyme active sites are highly specific.

Question 5

A student is analyzing two oligosaccharides, each made of four glucose monomers. Which of the following could make these oligosaccharides structurally different?

Accepted Answer

Both B and C

Question 6

Which statement about the ring forms of monosaccharides is correct?

Accepted Answer

Monosaccharides can form either alpha or beta ring structures

Question 7

How many carbon atoms are present in a ribose molecule?

Accepted Answer

5

Question 8

Which of the following is the correct molecular formula for glucose?

Accepted Answer

$$C_{6}H$$_{12}$$O_{6}$

Question 9

Which type of glycosidic bond is found in maltose?

Accepted Answer

$$\alpha-1$$,4 glycosidic bond

Question 10

Which of the following best describes the difference between an aldose and a ketose sugar?

Accepted Answer

Aldoses have a carbonyl group at the end of the carbon chain, while ketoses have it in the middle.

Question 11

Which of the following is NOT a possible structure for a carbon skeleton in organic molecules?

Accepted Answer

Double helix

Question 12

If a polysaccharide is composed of $$n$$ glucose monomers, how many water molecules are released during its synthesis by condensation reactions?

Accepted Answer

$$n-1$$

Question 13

Which of the following is a real-world application of glycoproteins?

Accepted Answer

They are involved in cell-cell recognition on the surface of animal cells.

Question 14

Which of the following statements about cellulose is true?

Accepted Answer

Cellulose is composed of $$\beta-$$glucose monomers linked by $$\beta-1$$,4 glycosidic bonds.

Question 15

Which of the following is a consequence of the specificity of enzyme active sites for glycosidic bond geometry?

Accepted Answer

Enzymes that hydrolyze $$\alpha-$$glycosidic bonds in starch cannot hydrolyze $$\beta-$$glycosidic bonds in cellulose.

Question 16

Which of the following is a pentose sugar?

Accepted Answer

Ribose

Question 17

Which of the following statements about condensation reactions in carbohydrate synthesis is correct?

Accepted Answer

Condensation reactions expel water to link monomers.

Question 18

Which of the following is a correct description of a glycosidic linkage?

Accepted Answer

A covalent bond formed between two monosaccharides by a condensation reaction

Question 19

Which of the following is a correct statement about the structure of glucose in aqueous solution?

Accepted Answer

Glucose can cyclize to form both $$\alpha$$ and $$\beta$$ ring structures.

Question 20

Which of the following is a correct comparison between starch and cellulose?

Accepted Answer

Both are composed of glucose monomers, but starch has $$\alpha-$$glycosidic linkages and cellulose has $$\beta-$$glycosidic linkages.

Carbohydrates: Structure and Function (Chapter 5 Study Notes)

Guida di studio - Domande di pratica

Study guide - Flashcard