Question 1

The splitting of one compound into two by the addition of water is called

Accepted Answer

A) covalent. 
B) ionic formation. 
C) hydrolysis. 
D) condensation. 
A) covalent. 
B) ionic formation. 
C) hydrolysis. 
D) condensation.

Question 2

The Precambrian-Cambrian boundary is

Accepted Answer

A) a point that separates reduction environments from oxidation environments. 
B) the separation point between prokaryotes and eukaryotes. 
C) a point of dramatically increased fossilization,although it is likely that many animal groups existed before this time. 
D) the shift-over from plant to animal life. 
A) a point that separates reduction environments from oxidation environments. 
B) the separation point between prokaryotes and eukaryotes. 
C) a point of dramatically increased fossilization,although it is likely that many animal groups existed before this time. 
D) the shift-over from plant to animal life.

Question 3

At the molecular level,a cell's ability to vary in its operational tolerance to temperature,etc. ,is most closely related to

Accepted Answer

A) enzyme activity and protein denaturation. 
B) ATP efficiency. 
C) replication of nucleic acids. 
D) extent of saturation of fatty acids. 
A) enzyme activity and protein denaturation. 
B) ATP efficiency. 
C) replication of nucleic acids. 
D) extent of saturation of fatty acids.

Question 4

Assumptions that the earliest life forms had to make their own food have been replaced with the belief that the earliest microorganisms were definitely primary heterotrophs.How could these earliest cells have lived if they did not make their own food,and why do we feel certain that they were not photosynthetic?

Accepted Answer

The assumption that the earliest life fo

Question 5

DNA and RNA are polymers composed of repeated units called

Accepted Answer

A) nucleotides. 
B) bases. 
C) sugars. 
D) None of the choices is correct. 
A) nucleotides. 
B) bases. 
C) sugars. 
D) None of the choices is correct.

Question 6

Neutral fats are

Accepted Answer

A) stored as glycogen. 
B) not stored. 
C) made of fatty acids and glycerol. 
D) made of chains of fatty acids linked together by water molecules. 
A) stored as glycogen. 
B) not stored. 
C) made of fatty acids and glycerol. 
D) made of chains of fatty acids linked together by water molecules.

Question 7

A(n)_______________ fatty acid has two or more carbon atoms joined by double bonds.

Accepted Answer

The answer of A(n)_______________ fatty acid has two or more...

Question 8

Heating dry mixtures of amino acids and then mixing them with water forms small

Accepted Answer

A) strands of DNA. 
B) living cells. 
C) proteinoid microspheres. 
D) plasma membranes. 
A) strands of DNA. 
B) living cells. 
C) proteinoid microspheres. 
D) plasma membranes.

Question 9

The most important of the energy-storing carbohydrate monomers is the molecule _______________.

Accepted Answer

The answer of The most important of the energy-storing carbohydrate...

Question 10

Polysaccharides are polymers made up of which kind of monomers?

Accepted Answer

A) Simple sugars 
B) Amino acids 
C) Nucleotides 
D) Alternating sugar and phosphate groups 
E) Fatty acids and glycerol 
A) Simple sugars 
B) Amino acids 
C) Nucleotides 
D) Alternating sugar and phosphate groups 
E) Fatty acids and glycerol

Question 11

A molecule of RNA that has enzymatic or catalytic properties is called a _______________.

Accepted Answer

A) deoxyribose 
B) nucleotide 
C) ribonucleic acid 
D) ribozyme 
A) deoxyribose 
B) nucleotide 
C) ribonucleic acid 
D) ribozyme

Question 12

Lipids are polymers made of which monomers?

Accepted Answer

A) Glucose or modified glucose molecules 
B) Amino acids 
C) Alternating sugar and phosphate groups 
D) Fatty acids and glycerol 
A) Glucose or modified glucose molecules 
B) Amino acids 
C) Alternating sugar and phosphate groups 
D) Fatty acids and glycerol

Question 13

What evidence leads researchers to believe that there was a diversity of animal life before the Cambrian if we cannot find extensive fossils of earlier animals?

Accepted Answer

The belief that there was a diversity of

Question 14

Submarine hot springs where seawater seeps through cracks in the bottom and comes close to the hot magma are called __________ ___________.

Accepted Answer

The answer of Submarine hot springs where seawater seeps through...

Question 15

The three principal groups of lipids are neutral fats,phospholipids,and

Accepted Answer

A) glycogen. 
B) steroids. 
C) amino acids. 
D) fatty acids. 
A) glycogen. 
B) steroids. 
C) amino acids. 
D) fatty acids.

Question 16

What are the essential properties of a "protocell"?

Accepted Answer

A protocell is a self-organized, endogen

Question 17

If eukaryotes are more complex than prokaryotes,then why are there prokaryotes living today?

Accepted Answer

The existence of prokaryotes today, desp

Question 18

Most biological polymerizations are ___________ dehydration reactions in which monomers are linked together by removal of water.

Accepted Answer

The answer of Most biological polymerizations are ___________ dehydration reactions...

Question 19

The Miller-Urey experiments demonstrated the formation of larger molecules from simple molecules.Why is there still a need for concentration in order to make formation of a protocell more likely?

Accepted Answer

The Miller-Urey experiments, conducted i

Question 20

Which of the following is a "structural" carbohydrate molecule?

Accepted Answer

A) Sucrose 
B) Glycogen 
C) Cellulose 
D) Glucose 
A) Sucrose 
B) Glycogen 
C) Cellulose 
D) Glucose

Exam 2: The Origin and Chemistry of Life

The splitting of one compound into two by the addition of water is called

The Precambrian-Cambrian boundary is

At the molecular level,a cell's ability to vary in its operational tolerance to temperature,etc. ,is most closely related to

DNA and RNA are polymers composed of repeated units called

Neutral fats are

A(n)_______________ fatty acid has two or more carbon atoms joined by double bonds.

Heating dry mixtures of amino acids and then mixing them with water forms small

The most important of the energy-storing carbohydrate monomers is the molecule _______________.

Polysaccharides are polymers made up of which kind of monomers?

A molecule of RNA that has enzymatic or catalytic properties is called a _______________.

Lipids are polymers made of which monomers?

What evidence leads researchers to believe that there was a diversity of animal life before the Cambrian if we cannot find extensive fossils of earlier animals?

Submarine hot springs where seawater seeps through cracks in the bottom and comes close to the hot magma are called __________ ___________.

The three principal groups of lipids are neutral fats,phospholipids,and

What are the essential properties of a "protocell"?

If eukaryotes are more complex than prokaryotes,then why are there prokaryotes living today?

Most biological polymerizations are ___________ dehydration reactions in which monomers are linked together by removal of water.

The Miller-Urey experiments demonstrated the formation of larger molecules from simple molecules.Why is there still a need for concentration in order to make formation of a protocell more likely?

Which of the following is a "structural" carbohydrate molecule?

Life: Biological Principles and the Science of Zoology

Cells As Units of Life

Cellular Metabolism

Genetics: a Review

Organic Evolution

The Reproductive Process

Principles of Development

Architectual Pattern of an Animal

Taxonomy and Phylogeny of Animals

Unicellular Eukaryotes

Sponges and Placozoans

Cnidarians and Ctenophores

Acoelomorpha, Platyzoa, and Mesozoa

Polyzoa and Kryptrochozoa

Molluscs

Annelids and Allied Taxa

Smaller Ecdysozoans

Trilobites, Chelicerates, and Myriapods

Crustaceans

Hexapods

Chaetognaths, echinoderms, and Hemichordates

Chordates

Fishes

Early Tetrapods and Modern Amphibians

Amniote Origins and Nonavian Reptiles

Birds

Mammals

Support, Protection, and Movement

Homeostasis: Osmotic Regulation, Excretion, and Temperature Regulation

Homeostasis: Internal Fluids and Respiration

Digestion and Nutrition

Nervous Coordination: Nervous System and Sense Organs

Chemical Coordination: Endocrine System

Immunity

Animal Behavior

Animal Distribution

Animal Ecology

Filters

Submarine hot springs where seawater seeps through cracks in the bottom and comes close to the hot magma are called _.