Question 1

Describe the different distinct forms that regions of proteins can have. Why are these forms so important?

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Question 2

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

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Question 3

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

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Question 4

Match the following characteristics of atoms and molecules with the proper bond.

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Question 5

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

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Question 6

Match the following examples with the correct cellular organelle.

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Question 7

What differentiates various atoms?

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Question 8

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

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Question 9

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?

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Question 10

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.

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Question 11

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

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Question 12

Match the following organic compounds with the appropriate subunit.

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Question 13

How are the four major types of biological molecules similar in structure?

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Question 14

Describe the primary components of an atom.

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Question 15

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?

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Question 16

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

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As cells grow, their surface area to volume ratio decreases. This can lead to difficulty in nutrient exchange and waste removal, which can ultimately limit cell growth and functioning. Therefore, cells typically divide to maintain a favorable surface-to-volume ratio.

Question 17

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

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Question 18

Because of the atomic structure of carbon, it tends to form

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The atomic structure of carbon has four valence electrons, which means it can share these electrons to form covalent bonds with other atoms, including other carbon atoms. Carbon is known for its ability to form long chains and different shapes in compounds due to its covalent bonding abilities.

Question 19

The HIV virus can take over much of the cell's machinery to produce many copies of the virus. Two classes of drugs that have been effective against HIV are base analogs (e.g., AZT)and protease inhibitors. How do these work to slow or stop HIV replication? What other steps in the HIV life cycle might be targets for drug development? What else can be done to try to stop the spread of HIV?

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Question 20

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

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Quiz 2: Cells and the Chemistry of Life