Question 1

Which property of carbon most directly explains its ability to form a vast diversity of organic molecules?

Accepted Answer

Its ability to form four covalent bonds with a variety of atoms

Question 2

Stanley Miller's classic experiment simulated early Earth conditions and demonstrated the abiotic synthesis of organic compounds. Which of the following best describes the significance of this experiment?

Accepted Answer

It supported the idea that organic molecules could form spontaneously under prebiotic conditions

Question 3

Which of the following elements is NOT one of the most frequent bonding partners of carbon in biological molecules?

Accepted Answer

Calcium

Question 4

What is the molecular geometry around each carbon atom in a molecule of methane ($$CH_4$$)?

Accepted Answer

Tetrahedral

Question 5

Which type of isomerism is responsible for the difference in biological activity between the two forms of albuterol used in asthma treatment?

Accepted Answer

Enantiomerism

Question 6

A molecule with the formula $$C_5H_{12}$$ can exist as several isomers. Which statement best describes these isomers?

Accepted Answer

They have the same molecular formula but different covalent arrangements of their atoms

Question 7

Which functional group is present in both estradiol and testosterone, and is responsible for their classification as steroids?

Accepted Answer

A common carbon skeleton of four fused rings

Question 8

Which of the following best explains why hydrocarbons are a major component of fats and serve as an important energy source?

Accepted Answer

Hydrocarbons can undergo reactions that release a large amount of energy

Question 9

Which of the following statements about ATP (adenosine triphosphate) is correct?

Accepted Answer

ATP stores potential energy that can be released by reaction with water

Question 10

If a carbon atom forms a double bond with another carbon atom, what is the spatial arrangement of the atoms bonded to these carbons?

Accepted Answer

All atoms bonded to the carbons are in the same plane as the carbons

Question 11

Which of the following best describes the relationship between the number of unpaired electrons in the valence shell of an atom and its bonding capacity?

Accepted Answer

The number of unpaired electrons in the valence shell is generally equal to the atom's valence, or bonding capacity

Question 12

Which of the following is a correct chemical reaction for the hydrolysis of ATP?

Accepted Answer

$$ATP + H_2O \rightarrow ADP + Inorganic\ phosphate$$

Question 13

Which of the following statements about enantiomers is TRUE?

Accepted Answer

Enantiomers are mirror images of each other and may have different effects in biological systems

Question 14

Which of the following is NOT a functional group commonly found in organic molecules?

Accepted Answer

Chloride group ($$-Cl)$$

Question 15

A fat molecule contains long hydrocarbon chains. What property do these chains impart to the molecule?

Accepted Answer

They allow the molecule to store large amounts of energy

Question 16

Which of the following best explains why the overall percentages of the major elements of life (C, H, O, N, S, P) are quite uniform from one organism to another?

Accepted Answer

These elements form the basic building blocks of organic molecules essential for life

Question 17

Which of the following molecules is an example of a hydrocarbon?

Accepted Answer

Methane ($$CH_4)$$

Question 18

Which statement best describes the difference between cis-trans (geometric) isomers?

Accepted Answer

They have the same covalent bonds but differ in their spatial arrangements

Question 19

Which of the following scenarios best illustrates the importance of functional groups in determining molecular properties?

Accepted Answer

Two molecules with identical carbon skeletons but different attached chemical groups have different biological activities

Carbon and the Molecular Diversity of Life (Campbell Biology, Chapter 4) - Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards