Question 1

When a protein is composed of more than one polypeptide chain,the arrangement of the chains is called the ____________ structure.

Accepted Answer

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

Question 2

Which polymer serves as the information storage molecule for cells?

Accepted Answer

A) Carbohydrate 
B) Nucleic acid 
C) Protein 
D) Lipids 
A) Carbohydrate 
B) Nucleic acid 
C) Protein 
D) Lipids B

Question 3

Hydrogen bonds between different parts of the polypeptide chain result in which level of protein structure?

Accepted Answer

A) Primary 
B) Secondary 
C) Tertiary 
D) Quaternary 
A) Primary 
B) Secondary 
C) Tertiary 
D) Quaternary B

Question 4

Lipids are insoluble in water because they are nonpolar.

Accepted Answer

A) True 
 B)False

Question 5

Denaturation of proteins is always a reversible process.

Accepted Answer

A) True 
 B)False

Question 6

If one strand is CCAATTG on DNA,then the complementary chain is:

Accepted Answer

A) CCAATTG 
B) AAGGUUC 
C) GGUUAAC 
D) GGTTAAC 
E) It is impossible to determinE. 
A) CCAATTG 
B) AAGGUUC 
C) GGUUAAC 
D) GGTTAAC 
E) It is impossible to determinE.

Question 7

Choose the statement that is true about DNA:

Accepted Answer

A) It exhibits base pairing. 
B) It forms a double helix. 
C) It is a polymer of nucleotides. 
D) All of these are correct. 
A) It exhibits base pairing. 
B) It forms a double helix. 
C) It is a polymer of nucleotides. 
D) All of these are correct.

Question 8

List the four major types of macromolecules,their subunits (building blocks),and their functions.

Accepted Answer

(1)Proteins.The subunits are amino acids

Question 9

The external skeleton of many invertebrates is made of:

Accepted Answer

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

Question 10

Describe five functions of proteins.

Accepted Answer

Proteins catalyze chemical rea

Question 11

The sequence of nucleotides in DNA specifies the sequence of ________________ in a protein.

Accepted Answer

The answer of The sequence of nucleotides in DNA specifies...

Question 12

Fatty acids that contain the maximum number of hydrogen atoms possible are said to be:

Accepted Answer

A) polyunsaturated 
B) monounsaturated 
C) saturated 
D) phospholipids 
A) polyunsaturated 
B) monounsaturated 
C) saturated 
D) phospholipids

Question 13

Which of the following is incorrect about saturated fats?

Accepted Answer

A) They are solid at room temperature. 
B) They contain the maximum number of hydrogen atoms. 
C) They contain glycerol plus three fatty acids. 
D) They are nonpolar molecules that don't mix with water. 
E) They are generally the type of fat found in plants. 
A) They are solid at room temperature. 
B) They contain the maximum number of hydrogen atoms. 
C) They contain glycerol plus three fatty acids. 
D) They are nonpolar molecules that don't mix with water. 
E) They are generally the type of fat found in plants.

Question 14

The $\alpha$-helix and $\beta$-pleated sheet are examples of which level of protein structure?

Accepted Answer

A) Primary 
B) Secondary 
C) Tertiary 
D) Quaternary 
A) Primary 
B) Secondary 
C) Tertiary 
D) Quaternary

Question 15

Which level of protein structure ultimately determines all the other levels of structure?

Accepted Answer

A) Primary 
B) Secondary 
C) Tertiary 
D) Quaternary 
A) Primary 
B) Secondary 
C) Tertiary 
D) Quaternary

Question 16

The polysaccharide found in the cell walls of plants is __________.

Accepted Answer

The answer of The polysaccharide found in the cell walls...

Question 17

Proteins are made up of ____________ strung together by _________ bonds.

Accepted Answer

A) amino acids;peptide 
B) monosaccharides;covalent 
C) monomers;ionic 
D) polymers;hydrogen 
A) amino acids;peptide 
B) monosaccharides;covalent 
C) monomers;ionic 
D) polymers;hydrogen

Question 18

Which of the following is the main component of cell membranes?

Accepted Answer

A) Cholesterol 
B) Sucrose 
C) Phospholipids 
D) Triglycerides 
E) Steroids 
A) Cholesterol 
B) Sucrose 
C) Phospholipids 
D) Triglycerides 
E) Steroids

Question 19

Unsaturated fats are usually solid at room temperature.

Accepted Answer

A) True 
 B)False

Question 20

The carbohydrate that plants use to store energy is called:

Accepted Answer

A) starch 
B) cellulose 
C) fructose 
D) sucrose 
E) chitin 
A) starch 
B) cellulose 
C) fructose 
D) sucrose 
E) chitin

Exam 3: Molecules of Life

When a protein is composed of more than one polypeptide chain,the arrangement of the chains is called the ____________ structure.

Which polymer serves as the information storage molecule for cells?

Hydrogen bonds between different parts of the polypeptide chain result in which level of protein structure?

Lipids are insoluble in water because they are nonpolar.

Denaturation of proteins is always a reversible process.

If one strand is CCAATTG on DNA,then the complementary chain is:

Choose the statement that is true about DNA:

List the four major types of macromolecules,their subunits (building blocks),and their functions.

The external skeleton of many invertebrates is made of:

Describe five functions of proteins.

The sequence of nucleotides in DNA specifies the sequence of ________________ in a protein.

Fatty acids that contain the maximum number of hydrogen atoms possible are said to be:

Which of the following is incorrect about saturated fats?

The α\alphaα -helix and β\betaβ -pleated sheet are examples of which level of protein structure?

Which level of protein structure ultimately determines all the other levels of structure?

The polysaccharide found in the cell walls of plants is __________.

Proteins are made up of ____________ strung together by _________ bonds.

Which of the following is the main component of cell membranes?

Unsaturated fats are usually solid at room temperature.

The carbohydrate that plants use to store energy is called:

The Science of Biology

The Chemistry of Life

Cells

Energy and Life

Photosynthesis: Acquiring Energy From the Sun

How Cells Harvest Energy From Food

Mitosis

Meiosis

Foundations of Genetics

DNA: the Genetic Material

How Genes Work

Genomics and Biotechnology

Evolution and Natural Selection

How We Name Living Things

Prokaryotes: the First Single-Celled Creatures

Protists: Advent of the Eukaryotes

Fungi Invade the Land

Evolution of the Animal Phyla

History of the Vertebrates

How Humans Evolved

The Animal Body and How It Moves

Circulation

Respiration

The Path of Food Through the Animal Body

Maintaining the Internal Environment

How the Animal Body Defends Itself

The Nervous System

The Senses

Chemical Signaling Within the Animal Body

Reproduction and Development

Evolution of Plants

Plant Form and Function

Plant Reproduction and Growth

Populations and Communities

Ecosystems

Behavior and the Environment

Human Influences on the Living World

Filters

The $\alpha$ -helix and $\beta$ -pleated sheet are examples of which level of protein structure?

Proteins are made up of ____ strung together by _ bonds.