Question 1

Glycoproteins are normally

Accepted Answer

A)  found on membranes. 
B)  secreted as extracellular proteins. 
C)  found inside organelles. 
D)  All of the answers are correct. 
E)  found on membranes and secreted as extracellular proteins. 
A)  found on membranes. 
B)  secreted as extracellular proteins. 
C)  found inside organelles. 
D)  All of the answers are correct. 
E)  found on membranes and secreted as extracellular proteins.

Question 2

What term describes stereoisomers that are mirror images of each other?

Accepted Answer

A)  anomers 
B)  epimers 
C)  enantiomers 
D)  diastereomers 
E)  meso compound 
A)  anomers 
B)  epimers 
C)  enantiomers 
D)  diastereomers 
E)  meso compound

Question 3

Which of the following explains how some viruses gain entry into specific cells?

Accepted Answer

A)  by attaching to ion channels 
B)  by cleaving the glycosidic bonds of cell surface glycoproteins and altering protein shapes 
C)  by binding to glycoproteins on the cell surface that are unique to specific cells 
D)  All of the answers are correct. 
E)  None of the answers is correct. 
A)  by attaching to ion channels 
B)  by cleaving the glycosidic bonds of cell surface glycoproteins and altering protein shapes 
C)  by binding to glycoproteins on the cell surface that are unique to specific cells 
D)  All of the answers are correct. 
E)  None of the answers is correct.

Question 4

Which of the following terms describes a class of compounds with the molecular formula (CH2O)n?

Accepted Answer

A)  proteoglycans 
B)  glycogen 
C)  mucoproteins 
D)  polysaccharides 
E)  monosaccharides 
A)  proteoglycans 
B)  glycogen 
C)  mucoproteins 
D)  polysaccharides 
E)  monosaccharides

Question 5

_______________ is a disaccharide composed of galactose and glucose joined by a β-1,4 glycosidic bond.

Accepted Answer

The answer of _______________ is a disaccharide composed of galactose...

Question 6

Which of the following are proteins that bind to specific carbohydrate structures in order to facilitate recognition between proteins and cells?

Accepted Answer

A)  mucoproteins 
B)  glycosaminoglycans 
C)  glycoproteins 
D)  lectins 
E)  proteoglycans 
A)  mucoproteins 
B)  glycosaminoglycans 
C)  glycoproteins 
D)  lectins 
E)  proteoglycans

Question 7

Fehling's solution is used to differentiate between reducing and nonreducing sugars.Which type of ion in Fehling's solution allows for this differentiation?

Accepted Answer

A)  cupric 
B)  sodium 
C)  iodide 
D)  hydroxide 
E)  bicarbonate 
A)  cupric 
B)  sodium 
C)  iodide 
D)  hydroxide 
E)  bicarbonate

Question 8

The simplest carbohydrates are the 3-carbon molecules:

Accepted Answer

A)  d- and l-glyceraldehyde. 
B)  dihydroxyacetone and d- and l-glyceraldehyde. 
C)  dihydroxyacetone and glycerate. 
D)  dihydroxyacetone and glycerol 
E)  None of the answers is correct. 
A)  d- and l-glyceraldehyde. 
B)  dihydroxyacetone and d- and l-glyceraldehyde. 
C)  dihydroxyacetone and glycerate. 
D)  dihydroxyacetone and glycerol 
E)  None of the answers is correct.

Question 9

An aldehyde and alcohol can react to form a

Accepted Answer

A)  hemialdol. 
B)  hemiketal. 
C)  hemiacetal. 
D)  All of the answers are correct. 
E)  None of the answers is correct. 
A)  hemialdol. 
B)  hemiketal. 
C)  hemiacetal. 
D)  All of the answers are correct. 
E)  None of the answers is correct.

Question 10

Which of the following is the storage form of glucose in animals?

Accepted Answer

A)  glycogen 
B)  amylose 
C)  amylopectin 
D)  cellulose 
E)  chitin 
A)  glycogen 
B)  amylose 
C)  amylopectin 
D)  cellulose 
E)  chitin

Question 11

In N-linked glycoproteins,the carbohydrate portion is attached to a(n)_____________ residue in the protein.

Accepted Answer

The answer of In N-linked glycoproteins,the carbohydrate portion is attached...

Question 12

Describe the mechanism by which N-linked sugars are synthesized and attached to proteins.

Accepted Answer

The units are assembled in the ER attach

Question 13

Why is it more difficult to determine the structure of the oligosaccharides,when compared to amino acid sequences?

Accepted Answer

Amino acids are linked through peptide b

Question 14

Plant starch is composed of amylose,a linear polymer of glucose,and a branched polymer of glucose referred to as _______________.

Accepted Answer

The answer of Plant starch is composed of amylose,a linear...

Question 15

What are the chemical and structural differences between cellulose and glycogen?

Accepted Answer

Both are glucose homopolymers.Glycogen i

Question 16

What molecule are most sugars attached to prior to their transfer to proteins?

Accepted Answer

A)  GDP 
B)  GMP 
C)  AMP 
D)  UMP 
E)  UDP 
A)  GDP 
B)  GMP 
C)  AMP 
D)  UMP 
E)  UDP

Question 17

What type of enzyme synthesizes oligosaccharides?

Accepted Answer

A)  amylase 
B)  sucrase 
C)  glycosyltransferase 
D)  $\beta$-galactosidase 
E)  protein kinase 
A)  amylase 
B)  sucrase 
C)  glycosyltransferase 
D)  $\beta$-galactosidase 
E)  protein kinase

Question 18

How is the d or l configuration determined?

Accepted Answer

The d or l configuration is de

Question 19

The nutritional storage form(s)of glucose in plants is/are

Accepted Answer

A)  glycogen. 
B)  amylose. 
C)  amylopectin. 
D)  cellulose. 
E)  amylose and amylopectin. 
A)  glycogen. 
B)  amylose. 
C)  amylopectin. 
D)  cellulose. 
E)  amylose and amylopectin.

Question 20

What are lectins?

Accepted Answer

A)  proteins that bind the carbohydrates on glycoproteins and other macromolecules 
B)  proteins that promote cell-cell interaction 
C)  proteins found in animals, plants, and microorganisms 
D)  All of the answers are correct. 
E)  None of the answers is correct. 
A)  proteins that bind the carbohydrates on glycoproteins and other macromolecules 
B)  proteins that promote cell-cell interaction 
C)  proteins found in animals, plants, and microorganisms 
D)  All of the answers are correct. 
E)  None of the answers is correct.

Exam 11: Carbohydrates

Glycoproteins are normally

What term describes stereoisomers that are mirror images of each other?

Which of the following explains how some viruses gain entry into specific cells?

Which of the following terms describes a class of compounds with the molecular formula (CH2O)n?

_______________ is a disaccharide composed of galactose and glucose joined by a β-1,4 glycosidic bond.

Which of the following are proteins that bind to specific carbohydrate structures in order to facilitate recognition between proteins and cells?

Fehling's solution is used to differentiate between reducing and nonreducing sugars.Which type of ion in Fehling's solution allows for this differentiation?

The simplest carbohydrates are the 3-carbon molecules:

An aldehyde and alcohol can react to form a

Which of the following is the storage form of glucose in animals?

In N-linked glycoproteins,the carbohydrate portion is attached to a(n)_____________ residue in the protein.

Describe the mechanism by which N-linked sugars are synthesized and attached to proteins.

Why is it more difficult to determine the structure of the oligosaccharides,when compared to amino acid sequences?

Plant starch is composed of amylose,a linear polymer of glucose,and a branched polymer of glucose referred to as _______________.

What are the chemical and structural differences between cellulose and glycogen?

What molecule are most sugars attached to prior to their transfer to proteins?

What type of enzyme synthesizes oligosaccharides?

How is the d or l configuration determined?

The nutritional storage form(s)of glucose in plants is/are

What are lectins?

Biochemistry: An Evolving Science

Protein Composition and Structure

Exploring Proteins and Proteomes

DNA, RNA, and the Flow of Genetic Information

Exploring Genes and Genomes

Exploring Evolution and Bioinformatics

Hemoglobin: a Portrait of a Protein in Action

Enzymes: Basic Concepts and Kinetics

Catalytic Strategies

Regulatory Strategies

Lipids and Cell Membranes

Membrane Channels and Pumps

Signal-Transduction Pathways

Metabolism: Basic Concepts and Design

Glycolysis and Gluconeogenesis

The Citric Acid Cycle

Oxidative Phosphorylation

The Light Reactions of Photosynthesis

The Calvin Cycle and the Pentose Phosphate Pathway

Glycogen Metabolism

Fatty Acid Metabolism

Protein Turnover and Amino Acid Catabolism

The Biosynthesis of Amino Acids

Nucleotide Biosynthesis

Biosynthesis of Membrane Lipids and Steroids

The Integration of Metabolism

DNA Replication, repair, and Recombination

RNA Synthesis and Processing

Protein Synthesis

The Control of Gene Expression in Prokaryotes

The Control of Gene Expression in Eukaryotes

Sensory Systems

The Immune System

Molecular Motors

Drug Development

Filters

Which of the following terms describes a class of compounds with the molecular formula (CH₂O)_n?