Question 1

Hydrogen bonding can take place between a hydrogen atom and what other atom?

Accepted Answer

A)  Fluorine 
B)  Nitrogen, oxygen, and fluorine 
C)  Nitrogen 
D)  Oxygen 
E)  Hydrogen 
A)  Fluorine 
B)  Nitrogen, oxygen, and fluorine 
C)  Nitrogen 
D)  Oxygen 
E)  Hydrogen

Question 2

Sulfur is an essential element in the human body, and studying its characteristics is important in understanding human physiology. Sulfur atoms have six electrons in their outer shell. Based on this information, which of the following is TRUE?

Accepted Answer

A)  Sulfur can form important molecules using covalent bonds. 
B)  Sulfur is an important isotope of hydrogen. 
C)  Sulfur is inert. 
D)  Sulfur has eight electrons in its outer shell. 
A)  Sulfur can form important molecules using covalent bonds. 
B)  Sulfur is an important isotope of hydrogen. 
C)  Sulfur is inert. 
D)  Sulfur has eight electrons in its outer shell.

Question 3

Scientists recommend a diet rich in antioxidants to stay healthy. What occurs at the atomic level to explain this recommendation?

Accepted Answer

A)  Antioxidants prevent free radicals from attacking other atoms or molecules. 
B)  Antioxidants are inert and do not interact with free radicals. 
C)  Antioxidants steal electrons, which gives cells extra energy. 
D)  Antioxidants cause an increase in pH, which is necessary for neutrality in cells. 
A)  Antioxidants prevent free radicals from attacking other atoms or molecules. 
B)  Antioxidants are inert and do not interact with free radicals. 
C)  Antioxidants steal electrons, which gives cells extra energy. 
D)  Antioxidants cause an increase in pH, which is necessary for neutrality in cells.

Question 4

Phosphorus has an atomic number of 15, so what is the distribution of its electrons?

Accepted Answer

A)  The first, second, and third energy levels have 5 electrons each. 
B)  The first energy level has 2, the second has 8, and the third has 5. 
C)  The first energy level has 8 and the second has 7. 
D)  The first energy level has 2 and the second has 13. 
E)  The electron arrangement cannot be determined from the atomic number alone. 
A)  The first, second, and third energy levels have 5 electrons each. 
B)  The first energy level has 2, the second has 8, and the third has 5. 
C)  The first energy level has 8 and the second has 7. 
D)  The first energy level has 2 and the second has 13. 
E)  The electron arrangement cannot be determined from the atomic number alone.

Question 5

When water freezes, stable hydrogen bonds form between the water molecules that create an open, six-sided (hexagonal) arrangement.

Accepted Answer

A) True 
 B)False

Question 6

How do buffers work?

Accepted Answer

A)  They accept and release H+. 
B)  They accept and release OH-. 
C)  They convert H+ and OH- to water. 
D)  They monitor the blood pH. 
E)  They soak up extra acid and base. 
A)  They accept and release H+. 
B)  They accept and release OH-. 
C)  They convert H+ and OH- to water. 
D)  They monitor the blood pH. 
E)  They soak up extra acid and base.

Question 7

An atomʹs nucleus is composed of

Accepted Answer

A)  protons and electrons. 
B)  protons only. 
C)  neutrons and electrons. 
D)  neutrons only. 
E)  protons and neutrons. 
A)  protons and electrons. 
B)  protons only. 
C)  neutrons and electrons. 
D)  neutrons only. 
E)  protons and neutrons.

Question 8

All animals need oxygen gas (O2) for their primary cellular-level functioning. Inside the cell, O2 is split apart into oxygen atoms. Eventually, electrons that are flowing through the cell will be ?received? by this oxygen. But first, the electrons combine with protons present in the cell to form a basic element that has a single proton and a single electron. Then this element combines with the oxygen to form a certain chemical compound.
In this scenario, what chemical compound is produced when this element combines with oxygen?

Accepted Answer

A)  Carbon dioxide (CO2) 
B)  Bicarbonate (HCO3) 
C)  Ozone (O3) 
D)  Water (H2O) 
A)  Carbon dioxide (CO2) 
B)  Bicarbonate (HCO3) 
C)  Ozone (O3) 
D)  Water (H2O)

Question 9

How does a base differ from an acid?

Accepted Answer

A base is a solution with a co

Question 10

What property of water, in which water molecules stick to each other, is responsible for the ability of plants to get water from their roots up to their leaves?

Accepted Answer

The answer of What property of water, in which water...

Exam 2: Atoms, Molecules, and Life

Hydrogen bonding can take place between a hydrogen atom and what other atom?

Sulfur is an essential element in the human body, and studying its characteristics is important in understanding human physiology. Sulfur atoms have six electrons in their outer shell. Based on this information, which of the following is TRUE?

Scientists recommend a diet rich in antioxidants to stay healthy. What occurs at the atomic level to explain this recommendation?

Phosphorus has an atomic number of 15, so what is the distribution of its electrons?

When water freezes, stable hydrogen bonds form between the water molecules that create an open, six-sided (hexagonal) arrangement.

How do buffers work?

An atomʹs nucleus is composed of

How does a base differ from an acid?

What property of water, in which water molecules stick to each other, is responsible for the ability of plants to get water from their roots up to their leaves?

An Introduction to Life on Earth

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

DNA: The Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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