Question 1

The sugar in DNA is comprised of ____ carbons.

Accepted Answer

A) three 
B) four ​ 
C) five ​ 
D) six ​ 
E) seven ​ 
A) three 
B) four ​ 
C) five ​ 
D) six ​ 
E) seven ​ C

Question 2

Which of these hydrocarbons has a double bond in its structure? ​

Accepted Answer

A) C3H8 
B) C2H6 ​ 
C) CH4 ​ 
D) C2H4 
E) C2H2 
A) C3H8 
B) C2H6 ​ 
C) CH4 ​ 
D) C2H4 
E) C2H2 D

Question 3

Figure 3.5
The molecule in the accompanying figure is mannose, an example of a ____ sugar. ​

Accepted Answer

A) triose 
B) hexose ​ 
C) pentose ​ 
D) heptose ​ 
E) tetrose ​ 
A) triose 
B) hexose ​ 
C) pentose ​ 
D) heptose ​ 
E) tetrose ​ B

Question 4

Describe the general structure of amino acids. ​

Accepted Answer

For 19 out of the 20 amino acids, a cent

Question 5

Approximately how many base pairs comprise one turn of the double helix in DNA? ​

Accepted Answer

A) 2.5 
B) 5 ​ 
C) 10 ​ 
D) 20 ​ 
E) 50 ​ 
A) 2.5 
B) 5 ​ 
C) 10 ​ 
D) 20 ​ 
E) 50 ​

Question 6

Triglycerides are used to coat skin, hair and feathers of animals to keep them protected, lubricated and pliable. ​

Accepted Answer

A) True 
 B)False

Question 7

Which amino acid can be involved in special covalent "disulfide bridges" that, when present, help to stabilize the tertiary and quaternary structure of proteins? ​

Accepted Answer

A) proline 
B) alanine 
C) leucine ​ 
D) cysteine 
E) methionine 
A) proline 
B) alanine 
C) leucine ​ 
D) cysteine 
E) methionine

Question 8

How many hydrogen bonds are formed between adenine and thymine? ​

Accepted Answer

A) 1 
B) 2 ​ 
C) 3 ​ 
D) 4 ​ 
E) 6 ​ 
A) 1 
B) 2 ​ 
C) 3 ​ 
D) 4 ​ 
E) 6 ​

Question 9

Structural isomers differ from each other ____. ​

Accepted Answer

A) in the arrangement of their covalent bonds 
B) in their molecular formulas ​ 
C) by being mirror images that cannot be superimposed on each other ​ 
D) by having double covalent bonds instead of single bonds ​ 
E) by having different atomic isotopes in their molecules 
A) in the arrangement of their covalent bonds 
B) in their molecular formulas ​ 
C) by being mirror images that cannot be superimposed on each other ​ 
D) by having double covalent bonds instead of single bonds ​ 
E) by having different atomic isotopes in their molecules

Question 10

Figure 3.16
The molecule in the accompanying figure is the pyrimidine ____, which is typically found in DNA but not RNA.

Accepted Answer

A) thymine 
B) adenine ​ 
C) uracil ​ 
D) guanine ​ 
E) cytosine ​ 
A) thymine 
B) adenine ​ 
C) uracil ​ 
D) guanine ​ 
E) cytosine ​

Question 11

The complementary sequence to the DNA template 5'-ATACGCT-3' is 3'-TATGCGA-5'.

Accepted Answer

A) True 
 B)False

Question 12

Amino acids, the monomer units comprising proteins, contain two functional groups, amino and carboxyl. ​

Accepted Answer

A) True 
 B)False

Question 13

Most of the enzymes that catalyze biochemical reactions involving amino acids recognize the L stereoisomer.

Accepted Answer

A) True 
 B)False

Question 14

Using what you know about how carbohydrate monomers are linked to form polymers, explain why most animals can digest starch more easily than cellulose?

Accepted Answer

Plant starches are held together by alph

Question 15

The linkage commonly found between subunits in a chain of monosaccharides is called a ____ bond. ​

Accepted Answer

A) phosphodiester 
B) disulfide 
C) glycosidic ​ 
D) hydrogen ​ 
E) peptide 
A) phosphodiester 
B) disulfide 
C) glycosidic ​ 
D) hydrogen ​ 
E) peptide

Question 16

Figure 3.2
The disaccharide in the accompanying figure is ____. ​

Accepted Answer

A) cellulose 
B) galactose ​ 
C) maltose ​ 
D) sucrose ​ 
E) lactose 
A) cellulose 
B) galactose ​ 
C) maltose ​ 
D) sucrose ​ 
E) lactose

Question 17

RNA is significantly less stable than DNA. Based on the structural differences between these molecules, what is a plausible hypothesis as to why this is?

Accepted Answer

DNA is comprised of deoxyribos

Question 18

In many animals, this polysaccharide is found in large quantities in liver and muscle cells. It is highly branched, with many a (1-4)and a (1-6)linkages. ​

Accepted Answer

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

Question 19

In proteins, structural segments called ____ provide flexibility that allow parts of the protein to bend, fold, or move. ​

Accepted Answer

A) random coils 
B) peptide bonds ​ 
C) b sheets ​ 
D) a helices ​ 
E) b polysaccharides ​ 
A) random coils 
B) peptide bonds ​ 
C) b sheets ​ 
D) a helices ​ 
E) b polysaccharides ​

Question 20

Probably the most abundant carbohydrate on Earth, which unbranched chain of b -glucose subunits is the primary structural fiber in plant cell walls? ​

Accepted Answer

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

Exam 3: Biological Molecules: the Carbon Compounds of Life

The sugar in DNA is comprised of ____ carbons.

Which of these hydrocarbons has a double bond in its structure? ​

Figure 3.5 The molecule in the accompanying figure is mannose, an example of a ____ sugar. ​

Describe the general structure of amino acids. ​

Approximately how many base pairs comprise one turn of the double helix in DNA? ​

Triglycerides are used to coat skin, hair and feathers of animals to keep them protected, lubricated and pliable. ​

Which amino acid can be involved in special covalent "disulfide bridges" that, when present, help to stabilize the tertiary and quaternary structure of proteins? ​

How many hydrogen bonds are formed between adenine and thymine? ​

Structural isomers differ from each other ____. ​

Figure 3.16 The molecule in the accompanying figure is the pyrimidine ____, which is typically found in DNA but not RNA.

The complementary sequence to the DNA template 5'-ATACGCT-3' is 3'-TATGCGA-5'.

Amino acids, the monomer units comprising proteins, contain two functional groups, amino and carboxyl. ​

Most of the enzymes that catalyze biochemical reactions involving amino acids recognize the L stereoisomer.

Using what you know about how carbohydrate monomers are linked to form polymers, explain why most animals can digest starch more easily than cellulose?

The linkage commonly found between subunits in a chain of monosaccharides is called a ____ bond. ​

Figure 3.2 The disaccharide in the accompanying figure is ____. ​

RNA is significantly less stable than DNA. Based on the structural differences between these molecules, what is a plausible hypothesis as to why this is?

In many animals, this polysaccharide is found in large quantities in liver and muscle cells. It is highly branched, with many a (1-4)and a (1-6)linkages. ​

In proteins, structural segments called ____ provide flexibility that allow parts of the protein to bend, fold, or move. ​

Probably the most abundant carbohydrate on Earth, which unbranched chain of b -glucose subunits is the primary structural fiber in plant cell walls? ​

Introduction to Biological Concepts and Research

Life, Chemistry, and Water

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

DNA Structure, Replication, and Organization

From DNA to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technologies: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Animal Nutrition

Regulating the Internal Environment

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

Which of these hydrocarbons has a double bond in its structure?

Figure 3.5 The molecule in the accompanying figure is mannose, an example of a ____ sugar.

Describe the general structure of amino acids.

Approximately how many base pairs comprise one turn of the double helix in DNA?

Triglycerides are used to coat skin, hair and feathers of animals to keep them protected, lubricated and pliable.

Which amino acid can be involved in special covalent "disulfide bridges" that, when present, help to stabilize the tertiary and quaternary structure of proteins?

How many hydrogen bonds are formed between adenine and thymine?

Structural isomers differ from each other ____.

Amino acids, the monomer units comprising proteins, contain two functional groups, amino and carboxyl.

The linkage commonly found between subunits in a chain of monosaccharides is called a ____ bond.

Figure 3.2 The disaccharide in the accompanying figure is ____.

In many animals, this polysaccharide is found in large quantities in liver and muscle cells. It is highly branched, with many a (1-4)and a (1-6)linkages.

In proteins, structural segments called ____ provide flexibility that allow parts of the protein to bend, fold, or move.

Probably the most abundant carbohydrate on Earth, which unbranched chain of b -glucose subunits is the primary structural fiber in plant cell walls?