Question 1

Macromolecules are typically formed by repetitively adding small monomers together.Which macromolecule is properly matched with the appropriate monomer?

Accepted Answer

A) polypeptide-amino acid 
B) nucleic acid-amino acid 
C) polysaccharide-nucleotide 
D) triglyceride-cholesterol 
A) polypeptide-amino acid 
B) nucleic acid-amino acid 
C) polysaccharide-nucleotide 
D) triglyceride-cholesterol A

Question 2

We use soap to clean ourselves better than we could with water alone.Soaps contain phospholipids that are responsible for the cleansing action.Which of the following statements is the most likely explanation for how soaps work?

Accepted Answer

A) Phospholipids are ions and therefore mix with both the water and oily dirt. 
B) Phospholipids are completely hydrophilic,and therefore oily dirt takes the place of the phospholipid molecules that would be dissolved in the rinse. 
C) The phospholipid tail attaches to the oily dirt while the phospholipid head interacts with the rinse water and carriers the dirt (and soap)away with it. 
D) The nonpolar fatty acid chains that make up the heads of the phospholipid are hydrophilic,and thus are repelled by the water. 
A) Phospholipids are ions and therefore mix with both the water and oily dirt. 
B) Phospholipids are completely hydrophilic,and therefore oily dirt takes the place of the phospholipid molecules that would be dissolved in the rinse. 
C) The phospholipid tail attaches to the oily dirt while the phospholipid head interacts with the rinse water and carriers the dirt (and soap)away with it. 
D) The nonpolar fatty acid chains that make up the heads of the phospholipid are hydrophilic,and thus are repelled by the water. C

Question 3

Carbon atoms are bound to each other by

Accepted Answer

A) ionic bonds. 
B) polar bonds. 
C) hydrogen bonds. 
D) covalent bonds. 
A) ionic bonds. 
B) polar bonds. 
C) hydrogen bonds. 
D) covalent bonds. D

Question 4

A disaccharide consists of two

Accepted Answer

A) sugars. 
B) hydrocarbons. 
C) fatty acids. 
D) amino acids. 
A) sugars. 
B) hydrocarbons. 
C) fatty acids. 
D) amino acids.

Question 5

If iodide ions (I⁻)were dissolved in water,they would be attracted to

Accepted Answer

A) A only 
B) B only 
C) C only 
D) A and C 
A) A only 
B) B only 
C) C only 
D) A and C

Question 6

MATCHING
Using the answer choices below (a through d), match the characteristic with its macromolecule class.
-used to create steroid molecules like cholesterol

Accepted Answer

A) lipids 
B) carbohydrates 
C) nucleic acids 
D) proteins 
A) lipids 
B) carbohydrates 
C) nucleic acids 
D) proteins

Question 7

Individual water molecules orient toward each other because of the ________ bonds that form between them.

Accepted Answer

A) covalent 
B) peptide 
C) hydrogen 
D) ionic 
A) covalent 
B) peptide 
C) hydrogen 
D) ionic

Question 8

Your supervisor provides you with lipids,carbohydrates,proteins,and nucleic acids and asks you to determine their chemical components.Which of the following elements would you NOT expect to find in these items?

Accepted Answer

A) phosphorus 
B) iron 
C) hydrogen 
D) nitrogen 
A) phosphorus 
B) iron 
C) hydrogen 
D) nitrogen

Question 9

Which of the following is the largest in size?

Accepted Answer

A) glucose 
B) protein 
C) carbon atom 
D) nucleotide 
A) glucose 
B) protein 
C) carbon atom 
D) nucleotide

Question 10

The chemical reaction that represents photosynthesis is 6 H₂O + 6 CO₂ → C₆H₁₂O₆ + 6 O₂.What are the reactants?

Accepted Answer

A) H₂O and CO₂ 
B) C₆H₁₂O₆ and CO₂ 
C) H₂O and O₂ 
D) C₆H₁₂O₆ and CO₂. 
A) H₂O and CO₂ 
B) C₆H₁₂O₆ and CO₂ 
C) H₂O and O₂ 
D) C₆H₁₂O₆ and CO₂.

Question 11

During a study session,a Biology classmate holds up a bottle of water and mentions that there are both hydrogen bonds and covalent bonds found within the liquid.Explain your classmate's statement by describing the types of bonds that are found within your bottle of water.

Accepted Answer

Your classmate is correct in his or her

Question 12

Which of the following is a monomer that can be commonly made from components in Earth's atmosphere?

Accepted Answer

A) nucleotides 
B) amino acids 
C) triglycerides 
D) monosaccharides 
A) nucleotides 
B) amino acids 
C) triglycerides 
D) monosaccharides

Question 13

Nitrogen has seven protons,seven neutrons,and seven electrons.What is the atomic mass of nitrogen?

Accepted Answer

A) 0 
B) 7 
C) 14 
D) 21 
A) 0 
B) 7 
C) 14 
D) 21

Question 14

Carbon,hydrogen,and nitrogen are all examples of

Accepted Answer

A) compounds. 
B) macromolecules. 
C) elements. 
D) amino acids. 
A) compounds. 
B) macromolecules. 
C) elements. 
D) amino acids.

Question 15

Which of the following distinguishes ionic bonds from covalent bonds?

Accepted Answer

A) Ionic bonds form between the same two elements,whereas covalent bonds form between different elements. 
B) Ionic bonds hold together compounds that do not dissolve in water,whereas covalent bonds hold together molecules that dissolve in water. 
C) Ionic bonds hold together oppositely charged atoms,whereas covalent bonds hold together atoms that share electrons. 
D) Ionic bonds consist of atoms with partial charges,whereas covalent bonds consist of atoms with full positive and negative charges. 
A) Ionic bonds form between the same two elements,whereas covalent bonds form between different elements. 
B) Ionic bonds hold together compounds that do not dissolve in water,whereas covalent bonds hold together molecules that dissolve in water. 
C) Ionic bonds hold together oppositely charged atoms,whereas covalent bonds hold together atoms that share electrons. 
D) Ionic bonds consist of atoms with partial charges,whereas covalent bonds consist of atoms with full positive and negative charges.

Question 16

How many atoms are present in a single molecule of C₈H₁₀N₄O₂?

Accepted Answer

A) 4 
B) 8 
C) 12 
D) 24 
A) 4 
B) 8 
C) 12 
D) 24

Question 17

The class of macromolecules that do NOT form true polymers are the ________.

Accepted Answer

The answer of The class of macromolecules that do NOT...

Question 18

A group of astronauts returning from outer space studied samples taken from their lunar landing.They found that one of their samples was coated with organic compounds.Which of the following statements must be correct about their samples?

Accepted Answer

A) The compounds must be covered with ammonia (NH₃)and water vapor. 
B) The samples must lack water,but contain DNA. 
C) The samples must contain carbon atoms. 
D) The specimen must lack water,pesticides,and added hormones. 
A) The compounds must be covered with ammonia (NH₃)and water vapor. 
B) The samples must lack water,but contain DNA. 
C) The samples must contain carbon atoms. 
D) The specimen must lack water,pesticides,and added hormones.

Question 19

Based on the water molecule pictured below,which of the labeled areas possesses a partial negative charge?

Accepted Answer

A) A only 
B) B only 
C) C only 
D) A and C 
A) A only 
B) B only 
C) C only 
D) A and C

Question 20

A carwash attendant offers to treat your windshield with a protective agent.This substance coats the glass,causing beads of water to easily roll off during a rain shower.Which of the following must be correct about the protective agent?

Accepted Answer

A) It resists temperature changes well. 
B) It must be an acid. 
C) It is a polar substance. 
D) It must be hydrophobic. 
A) It resists temperature changes well. 
B) It must be an acid. 
C) It is a polar substance. 
D) It must be hydrophobic.

Macromolecules are typically formed by repetitively adding small monomers together.Which macromolecule is properly matched with the appropriate monomer?

We use soap to clean ourselves better than we could with water alone.Soaps contain phospholipids that are responsible for the cleansing action.Which of the following statements is the most likely explanation for how soaps work?

Carbon atoms are bound to each other by

A disaccharide consists of two

If iodide ions (I⁻)were dissolved in water,they would be attracted to

MATCHING Using the answer choices below (a through d), match the characteristic with its macromolecule class. -used to create steroid molecules like cholesterol

Individual water molecules orient toward each other because of the ________ bonds that form between them.

Your supervisor provides you with lipids,carbohydrates,proteins,and nucleic acids and asks you to determine their chemical components.Which of the following elements would you NOT expect to find in these items?

Which of the following is the largest in size?

The chemical reaction that represents photosynthesis is 6 H₂O + 6 CO₂ → C₆H₁₂O₆ + 6 O₂.What are the reactants?

During a study session,a Biology classmate holds up a bottle of water and mentions that there are both hydrogen bonds and covalent bonds found within the liquid.Explain your classmate's statement by describing the types of bonds that are found within your bottle of water.

Which of the following is a monomer that can be commonly made from components in Earth's atmosphere?

Nitrogen has seven protons,seven neutrons,and seven electrons.What is the atomic mass of nitrogen?

Carbon,hydrogen,and nitrogen are all examples of

Which of the following distinguishes ionic bonds from covalent bonds?

How many atoms are present in a single molecule of C₈H₁₀N₄O₂?

The class of macromolecules that do NOT form true polymers are the ________.

A group of astronauts returning from outer space studied samples taken from their lunar landing.They found that one of their samples was coated with organic compounds.Which of the following statements must be correct about their samples?

Based on the water molecule pictured below,which of the labeled areas possesses a partial negative charge?

A carwash attendant offers to treat your windshield with a protective agent.This substance coats the glass,causing beads of water to easily roll off during a rain shower.Which of the following must be correct about the protective agent?

The Nature of Science

Life Is Cellular

How Cells Work

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Human Evolution

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Exam 2: Chemistry of Life

Macromolecules are typically formed by repetitively adding small monomers together.Which macromolecule is properly matched with the appropriate monomer?

We use soap to clean ourselves better than we could with water alone.Soaps contain phospholipids that are responsible for the cleansing action.Which of the following statements is the most likely explanation for how soaps work?

Carbon atoms are bound to each other by

A disaccharide consists of two

If iodide ions (I⁻)were dissolved in water,they would be attracted to

MATCHING Using the answer choices below (a through d), match the characteristic with its macromolecule class. -used to create steroid molecules like cholesterol

Individual water molecules orient toward each other because of the ________ bonds that form between them.

Your supervisor provides you with lipids,carbohydrates,proteins,and nucleic acids and asks you to determine their chemical components.Which of the following elements would you NOT expect to find in these items?

Which of the following is the largest in size?

The chemical reaction that represents photosynthesis is 6 H₂O + 6 CO₂ → C₆H₁₂O₆ + 6 O₂.What are the reactants?

During a study session,a Biology classmate holds up a bottle of water and mentions that there are both hydrogen bonds and covalent bonds found within the liquid.Explain your classmate's statement by describing the types of bonds that are found within your bottle of water.

Which of the following is a monomer that can be commonly made from components in Earth's atmosphere?

Nitrogen has seven protons,seven neutrons,and seven electrons.What is the atomic mass of nitrogen?

Carbon,hydrogen,and nitrogen are all examples of

Which of the following distinguishes ionic bonds from covalent bonds?

How many atoms are present in a single molecule of C₈H₁₀N₄O₂?

The class of macromolecules that do NOT form true polymers are the ________.

A group of astronauts returning from outer space studied samples taken from their lunar landing.They found that one of their samples was coated with organic compounds.Which of the following statements must be correct about their samples?

Based on the water molecule pictured below,which of the labeled areas possesses a partial negative charge?

A carwash attendant offers to treat your windshield with a protective agent.This substance coats the glass,causing beads of water to easily roll off during a rain shower.Which of the following must be correct about the protective agent?

The Nature of Science

Life Is Cellular

How Cells Work

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

What Genes Are

How Genes Work

Evidence for Evolution

Mechanisms of Evolution

Adaptation and Species

The History of Life

Human Evolution

General Principles of Ecology

Growth of Populations

Communities of Organisms

Ecosystems

Applying the Science

Filters