Question 1

Because the shared electrons between hydrogen and oxygen spend more time orbiting the oxygen than the hydrogen, water is

Accepted Answer

A) a charged molecule. 
B) a neutral molecule. 
C) a nonpolar molecule. 
D) ionized. 
E) a polar molecule. 
A) a charged molecule. 
B) a neutral molecule. 
C) a nonpolar molecule. 
D) ionized. 
E) a polar molecule. E

Question 2

Although viruses exhibit some of the characteristics that define living organisms, they are considered nonliving. Explain why.

Accepted Answer

Viruses have a basic internal structure and order based on biological molecules. They have genetic material that can change over time, so they show evolution. Parts of the virus particle can move, showing motility. However, viruses cannot carry out their own metabolism, cannot respond to their environment, and do not exhibit true growth and development.

Question 3

Kool-Aid readily dissolves in water. This means that Kool-Aid is

Accepted Answer

A) an acid. 
B) hydrophilic. 
C) hydrophobic. 
D) a base. 
E) a buffer. 
A) an acid. 
B) hydrophilic. 
C) hydrophobic. 
D) a base. 
E) a buffer. B

Question 4

The cells that line your small intestine absorb nutrients. Their cell membranes consist of many extensions and folds that project into the open space of the intestine. Why is this cell structure advantageous in the small intestine?

Accepted Answer

The main function of these cells is abso

Question 5

How are viruses such as HIV similar to living things? How are they different?

Accepted Answer

The best answers classify viruses accord

Question 6

What causes water molecules to form hydrogen bonds with each other?

Accepted Answer

The covalent bond between the H and the

Question 7

Name a place in the human body that is particularly acidic. Where are fluids close to neutrality? Where are fluids in the human body particularly basic?

Accepted Answer

The stomach produces hydrochloric acid,

Question 8

Match the following components of HIV with the correct descriptive term:

Accepted Answer

1. b; 2. e

Question 9

Most of a living organism (approximately 98%)is made up of what three elements?

Accepted Answer

carbon, hy

Question 10

Most cells are small. When they reach a certain size, cells typically divide. This has to do with the

Accepted Answer

A) amount of genetic material. 
B) surface-to-volume ratio. 
C) inability to produce more components of the cell membrane. 
D) fact that they cannot possess sufficient numbers of organelles for normal cell functioning. 
E) differences between viral particles and eukaryotic cells. 
A) amount of genetic material. 
B) surface-to-volume ratio. 
C) inability to produce more components of the cell membrane. 
D) fact that they cannot possess sufficient numbers of organelles for normal cell functioning. 
E) differences between viral particles and eukaryotic cells.

Question 11

The internal pH of most cells is near neutral. This allows

Accepted Answer

A) water to break down into H+ and OH-. 
B) enzymes within the cells to act at peak efficiency. 
C) the buffers produced within the body to affect these cells. 
D) enzymes outside of these cells to function. 
E) rapid fluctuations between acidic and basic conditions within the cells. 
A) water to break down into H+ and OH-. 
B) enzymes within the cells to act at peak efficiency. 
C) the buffers produced within the body to affect these cells. 
D) enzymes outside of these cells to function. 
E) rapid fluctuations between acidic and basic conditions within the cells.

Question 12

Match the following organic compounds with the appropriate subunit.

Accepted Answer

The answer of Match the following organic compounds with the...

Question 13

Examples of polysaccharides include all of the following except

Accepted Answer

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

Question 14

Diagram an atom of nitrogen (which consists of 7 protons, 7 neutrons, and 7 electrons). Be sure to indicate in your illustration the relative size, position, and charge of the subatomic particles.

Accepted Answer

The diagram should be circular in nature

Question 15

Match between columns
                        Premises: For moving small, water-soluble, organic compounds down their concentration gradient
For moving very small, inorganic substances down their concentration gradient
For pumping substances with the expenditure of energy
For taking up very large particles

Accepted Answer

The Answer of active transport and diffusion and exocytosis and is...

Question 16

Think about your favorite kind of pizza. How is your body provided with each of the four major biological molecules when you eat this pizza? Why is it important that your food contains these biological molecules?

Accepted Answer

This is an open-ended question, but the

Question 17

Surface tension of water is due to

Accepted Answer

A) ionic bonding. 
B) ionization of water. 
C) the ability of water to act as a solvent. 
D) hydrogen bonding. 
E) water molecules repelling each other. 
A) ionic bonding. 
B) ionization of water. 
C) the ability of water to act as a solvent. 
D) hydrogen bonding. 
E) water molecules repelling each other.

Question 18

12C, 13C, and 14C are all isotopes of carbon. They differ in their

Accepted Answer

A) overall charges. 
B) number of electrons. 
C) number of protons. 
D) number of neutrons. 
E) electron energy shells. 
A) overall charges. 
B) number of electrons. 
C) number of protons. 
D) number of neutrons. 
E) electron energy shells.

Question 19

Match the following examples with the correct cellular organelle.

Accepted Answer

5. f; 6. c

Question 20

Match the following characteristics or examples of organic molecules with the molecular classification.

Accepted Answer

The answer of Match the following characteristics or examples of...

Exam 2: Cells and the Chemistry of Life

Because the shared electrons between hydrogen and oxygen spend more time orbiting the oxygen than the hydrogen, water is

Although viruses exhibit some of the characteristics that define living organisms, they are considered nonliving. Explain why.

Kool-Aid readily dissolves in water. This means that Kool-Aid is

The cells that line your small intestine absorb nutrients. Their cell membranes consist of many extensions and folds that project into the open space of the intestine. Why is this cell structure advantageous in the small intestine?

How are viruses such as HIV similar to living things? How are they different?

What causes water molecules to form hydrogen bonds with each other?

Name a place in the human body that is particularly acidic. Where are fluids close to neutrality? Where are fluids in the human body particularly basic?

Match the following components of HIV with the correct descriptive term:

Most of a living organism (approximately 98%)is made up of what three elements?

Most cells are small. When they reach a certain size, cells typically divide. This has to do with the

The internal pH of most cells is near neutral. This allows

Match the following organic compounds with the appropriate subunit.

Examples of polysaccharides include all of the following except

Diagram an atom of nitrogen (which consists of 7 protons, 7 neutrons, and 7 electrons). Be sure to indicate in your illustration the relative size, position, and charge of the subatomic particles.

Think about your favorite kind of pizza. How is your body provided with each of the four major biological molecules when you eat this pizza? Why is it important that your food contains these biological molecules?

Surface tension of water is due to

12C, 13C, and 14C are all isotopes of carbon. They differ in their

Match the following examples with the correct cellular organelle.

Match the following characteristics or examples of organic molecules with the molecular classification.

What Is Life

How Cells Take in and Use Energy

The Cell Cycle

Patterns of Inheritance

DNA: The Thread of Life

Genes, Proteins, and Genetic Engineering

Reproduction and Development

The Mechanisms of Evolution

Lifes Origins and Biodiversity

Single-Celled Life

Fungi and Plants: Decomposers and Producers

The Evolution and Diversity of Animals

Ecology of Populations and Communities

Ecosystems and the Biosphere

Body Function, Survival, and the Steady State

Circulation and Respiration

Defense Against Disease

Animal Nutrition and Digestion

Hormones: Messengers of Change

The Nervous System

The Body in Motion

Plant Architecture and Function

Plant Growth, Hormones, and Engineering

The Dynamic Plant

Filters

¹²C, ¹³C, and ¹⁴C are all isotopes of carbon. They differ in their