Question 1

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

Accepted Answer

carbon, hy...

Question 2

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 3

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 4

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.F) B) and E)
G) B) and C)

Question 5

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 6

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.F) D) and E)
G) B) and C)

Question 7

Match the following organic compounds with the appropriate subunit.

Accepted Answer

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

Question 8

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

Accepted Answer

The best answers classify viruses accord...

Question 9

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 10

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.F) B) and D)
G) B) and E)

Question 11

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.F) B) and D)
G) B) and E) E

Question 12

Match the following examples with the correct cellular organelle.

Accepted Answer

5. f; 6. c...

Question 13

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

Accepted Answer

1. b; 2. e...

Question 14

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...

Question 15

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

Accepted Answer

The covalent bond between the H and the ...

Question 16

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 17

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 18

Examples of polysaccharides include all of the following except

Accepted Answer

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

Question 19

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.F) B) and D)
G) A) and E) B

Question 20

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.F) C) and D)
G) A) and C)

Exam 2: Cells and the Chemistry of Life

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

Correct Answer
verified
carbon, hy...
View Answer

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?

Correct Answer
verified
The main function of these cells is abso...
View Answer

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?

Correct Answer
verified
This is an open-ended question, but the ...
View Answer

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

Correct Answer
verified

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.

Correct Answer
verified
The diagram should be circular in nature...
View Answer

Surface tension of water is due to

Correct Answer
verified

Match the following organic compounds with the appropriate subunit.

Correct Answer
verified

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

Correct Answer
verified
The best answers classify viruses accord...
View Answer

Match the following descriptions with the appropriate mechanism of transport across the plasma membrane.

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

Correct Answer
verified

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

Correct Answer
verified
E

Match the following examples with the correct cellular organelle.

Correct Answer
verified
5. f; 6. c...
View Answer

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

Correct Answer
verified
1. b; 2. e...
View Answer

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

Correct Answer
verified

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

Correct Answer
verified
The covalent bond between the H and the ...
View Answer

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

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?

Correct Answer
verified
The stomach produces hydrochloric acid, ...
View Answer

Examples of polysaccharides include all of the following except

Correct Answer
verified

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

Correct Answer
verified
B

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

Correct Answer
verified

Exam 2: Cells and the Chemistry of Life

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

Correct Answerverifiedcarbon, hy...View AnswerShow Answer

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?

Correct AnswerverifiedThe main function of these cells is abso...View AnswerShow Answer

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?

Correct AnswerverifiedThis is an open-ended question, but the ...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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.

Correct AnswerverifiedThe diagram should be circular in nature...View AnswerShow Answer

Surface tension of water is due to

Correct AnswerverifiedShow Answer

Match the following organic compounds with the appropriate subunit.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe best answers classify viruses accord...View AnswerShow Answer

Match the following descriptions with the appropriate mechanism of transport across the plasma membrane.

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedE

Match the following examples with the correct cellular organelle.

Correct Answerverified5. f; 6. c...View AnswerShow Answer

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

Correct Answerverified1. b; 2. e...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedThe covalent bond between the H and the ...View AnswerShow Answer

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

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?

Correct AnswerverifiedThe stomach produces hydrochloric acid, ...View AnswerShow Answer

Examples of polysaccharides include all of the following except

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

Correct Answer
verified
carbon, hy...
View Answer

Correct Answer
verified
The main function of these cells is abso...
View Answer

Correct Answer
verified
This is an open-ended question, but the ...
View Answer

Correct Answer
verified

Correct Answer
verified
The diagram should be circular in nature...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The best answers classify viruses accord...
View Answer

Correct Answer
verified

Correct Answer
verified
E

Correct Answer
verified
5. f; 6. c...
View Answer

Correct Answer
verified
1. b; 2. e...
View Answer

Correct Answer
verified

Correct Answer
verified
The covalent bond between the H and the ...
View Answer

Correct Answer
verified
The stomach produces hydrochloric acid, ...
View Answer

Correct Answer
verified

Correct Answer
verified
B

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

Correct Answer
verified