Question 1

Unique chemical groups that confer special properties to an organic molecule are called:

Accepted Answer

A)  monomers. 
B)  amino acids. 
C)  functional groups. 
D)  lipids. 
A)  monomers. 
B)  amino acids. 
C)  functional groups. 
D)  lipids.

Question 2

Which of the following is the correct order for the flow of information in the cell?

Accepted Answer

A)  Proteins code for DNA, which codes for RNA. 
B)  RNA codes for DNA, which codes for protein. 
C)  DNA codes for protein, which codes for RNA. 
D)  DNA codes for RNA, which codes for protein. 
A)  Proteins code for DNA, which codes for RNA. 
B)  RNA codes for DNA, which codes for protein. 
C)  DNA codes for protein, which codes for RNA. 
D)  DNA codes for RNA, which codes for protein.

Question 3

Amino acids contain both amino and carboxyl functional groups.

Accepted Answer

A) True 
 B)False

Question 4

In some vintage science fiction movies, space travelers find themselves on a planet orbiting a distant star in which there are curious forms of life based on silicon instead of carbon. Although the story clearly is sci-fi, there is an aura of plausibility in the choice of silicon, an atom with 14 protons, in place of carbon as this alien life-form's central atom. The reason is that silicon:

Accepted Answer

A)  has four electrons in its outermost shell. 
B)  has one more proton than carbon, so is very similar to it. 
C)  is an isotope of carbon. 
D)  is lighter than carbon. 
E)  is heavier than carbon. 
A)  has four electrons in its outermost shell. 
B)  has one more proton than carbon, so is very similar to it. 
C)  is an isotope of carbon. 
D)  is lighter than carbon. 
E)  is heavier than carbon.

Question 5

Chitin and cellulose are examples of:

Accepted Answer

A)  structural polysaccharides. 
B)  storage polysaccharides. 
C)  monosaccharides. 
D)  disacchrides. 
A)  structural polysaccharides. 
B)  storage polysaccharides. 
C)  monosaccharides. 
D)  disacchrides.

Question 6

Water is an organic molecule.

Accepted Answer

A) True 
 B)False

Question 7

A functional group added to a hydrocarbon usually makes the hydrocarbon:

Accepted Answer

A)  nonpolar. 
B)  hydrophobic. 
C)  polar. 
D)  acidic. 
E)  an isomer. 
A)  nonpolar. 
B)  hydrophobic. 
C)  polar. 
D)  acidic. 
E)  an isomer.

Question 8

Which of the following lipids is the primary component in cell membranes?

Accepted Answer

A)  triglycerides 
B)  steroids 
C)  phospholipids 
D)  glycerol 
A)  triglycerides 
B)  steroids 
C)  phospholipids 
D)  glycerol

Question 9

Saturated fats are usually found in:

Accepted Answer

A)  coconut oil. 
B)  canola oil. 
C)  safflower oil. 
D)  a beef steak. 
E)  both coconut oil and a beef steak. 
A)  coconut oil. 
B)  canola oil. 
C)  safflower oil. 
D)  a beef steak. 
E)  both coconut oil and a beef steak.

Question 10

Describe the structure of phospholipids, and state where they are found in cells.

Accepted Answer

Phospholipids have hydrophobic tails and

Question 11

Which of the following is the indigestible (at least for humans) glucose polysaccharide that is found in plants?

Accepted Answer

A)  starch 
B)  glycogen 
C)  cellulose 
D)  chitin 
A)  starch 
B)  glycogen 
C)  cellulose 
D)  chitin

Question 12

ATP (adenosine triphosphate) is an energy-carrying, modified ________.

Accepted Answer

The answer of ATP (adenosine triphosphate) is an energy-carrying, modified...

Question 13

Match the following.
A) DNA
B) lipoproteins
C) glycoproteins
D) polysaccharide
E) structural proteins
-A carbohydrate polymer

Accepted Answer

The answer of Match the following.
A) DNA
B) lipoproteins
C) glycoproteins
D) polysaccharide
E)...

Question 14

The active site of an enzyme is a product of its ________.

Accepted Answer

three-dime

Question 15

Which of the following is a polymer?

Accepted Answer

A)  fat 
B)  steroid 
C)  nucleic acid 
D)  wax 
A)  fat 
B)  steroid 
C)  nucleic acid 
D)  wax

Question 16

Name the four most important groups of biological molecules necessary for life. List one polymer and one monomer of each.

Accepted Answer

Carbohydrates, lipids, proteins, and nuc

Question 17

Unsaturated fatty acids:

Accepted Answer

A)  have one or more double bonds between the carbons. 
B)  are usually found in animal fats. 
C)  have long been linked with heart disease. 
D)  contain the maximum number of hydrogen atoms possible. 
A)  have one or more double bonds between the carbons. 
B)  are usually found in animal fats. 
C)  have long been linked with heart disease. 
D)  contain the maximum number of hydrogen atoms possible.

Question 18

Explain how a protein ends up with its final shape.

Accepted Answer

The amino acid sequence determines how t

Question 19

Proteins that are composed of more than one polypeptide chain are said to have ________ structure.

Accepted Answer

A)  secondary 
B)  tertiary 
C)  primary 
D)  quaternary 
A)  secondary 
B)  tertiary 
C)  primary 
D)  quaternary

Question 20

In many cases, carbohydrates have the following ratio of elements:

Accepted Answer

A)  carbon, hydrogen, and oxygen in a ratio of 1:2:1. 
B)  carbon and hydrogen in a ratio of 1:2. 
C)  carbon, hydrogen, and nitrogen in a ratio of 1:2:1. 
D)  carbon, oxygen, and hydrogen in a ratio of 1:2:1. 
E)  carbon, hydrogen, and oxygen in a ratio of 2:1:2. 
A)  carbon, hydrogen, and oxygen in a ratio of 1:2:1. 
B)  carbon and hydrogen in a ratio of 1:2. 
C)  carbon, hydrogen, and nitrogen in a ratio of 1:2:1. 
D)  carbon, oxygen, and hydrogen in a ratio of 1:2:1. 
E)  carbon, hydrogen, and oxygen in a ratio of 2:1:2.

Exam 3: Lifes Components: Biological Molecules

Unique chemical groups that confer special properties to an organic molecule are called:

Which of the following is the correct order for the flow of information in the cell?

Amino acids contain both amino and carboxyl functional groups.

Chitin and cellulose are examples of:

Water is an organic molecule.

A functional group added to a hydrocarbon usually makes the hydrocarbon:

Which of the following lipids is the primary component in cell membranes?

Saturated fats are usually found in:

Describe the structure of phospholipids, and state where they are found in cells.

Which of the following is the indigestible (at least for humans) glucose polysaccharide that is found in plants?

ATP (adenosine triphosphate) is an energy-carrying, modified ________.

Match the following. A) DNA B) lipoproteins C) glycoproteins D) polysaccharide E) structural proteins -A carbohydrate polymer

The active site of an enzyme is a product of its ________.

Which of the following is a polymer?

Name the four most important groups of biological molecules necessary for life. List one polymer and one monomer of each.

Unsaturated fatty acids:

Explain how a protein ends up with its final shape.

Proteins that are composed of more than one polypeptide chain are said to have ________ structure.

In many cases, carbohydrates have the following ratio of elements:

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, Water, and Ph

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, Translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, Evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late, Traveling Far: the Evolution of Human Beings

Viruses, Bacteria, Archaea, and Protists: the Diversity of Life 1

Fungi : the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, Skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, Nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

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