Question 1

Which property of carbon allows it to form large, complex, and diverse molecules essential for life?

Accepted Answer

Its four valence electrons, allowing it to form four covalent bonds with a variety of atoms

Question 2

Which of the following best defines a hydrocarbon?

Accepted Answer

A molecule containing only carbon and hydrogen

Question 3

Which type of isomer is most relevant in the pharmaceutical industry due to its impact on drug effectiveness?

Accepted Answer

Enantiomers

Question 4

A molecule with the formula $$C_5H_{12}$$ can exist as both pentane and 2-methylbutane. What type of isomerism does this illustrate?

Accepted Answer

Structural isomerism

Question 5

Which functional group is characterized by the formula $$-COOH$$ and is commonly found in amino acids?

Accepted Answer

Carboxyl group

Question 6

What is the main reason that carbon atoms can form such a wide variety of molecules?

Accepted Answer

Carbon atoms can bond to four other atoms, allowing for branching, rings, and chains

Question 7

Which of the following molecules is NOT a hydrocarbon?

Accepted Answer

Methanol ($$CH_3OH)$$

Question 8

Which functional group is responsible for the acidic properties of organic acids?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 9

ATP (adenosine triphosphate) is an important molecule in cellular processes because it contains which functional group?

Accepted Answer

Phosphate group

Question 10

Which of the following best describes an organic compound?

Accepted Answer

A compound containing carbon and usually hydrogen

Question 11

Which of the following is a correct example of a cis-trans isomer?

Accepted Answer

Two molecules with the same formula but different positions of substituents around a double bond

Question 12

Which functional group is found in thiols and is important for protein structure due to its ability to form disulfide bonds?

Accepted Answer

Sulfhydryl group ($$-SH)$$

Question 13

Which of the following statements about enantiomers is TRUE?

Accepted Answer

They are mirror images of each other and can have different biological activities

Question 14

A molecule contains a $$-NH_2$ group. What property does this functional group typically confer?

Accepted Answer

Basicity

Question 15

Which of the following is a real-world example of a hydrocarbon found in biological systems?

Accepted Answer

Fatty acid tails in triglycerides

Question 16

Which functional group is commonly found in sugars and is characterized by the formula $$-OH$$?

Accepted Answer

Hydroxyl group

Question 17

Which of the following best explains why carbon skeletons can vary so greatly in organic molecules?

Accepted Answer

Carbon can form chains, branches, and rings, and vary in length and double bond position

Question 18

Which chemical group is essential for the transfer of energy in cells and is found in ATP?

Accepted Answer

Phosphate group

Question 19

A molecule with the formula $$C_2H_4 is $$known as ethene. What type of bond is present between the two carbon atoms?

Accepted Answer

Double covalent bond

Question 20

Which of the following functional groups is most likely to make a molecule more hydrophilic and increase its solubility in water?

Accepted Answer

Hydroxyl group ($$-OH)$$

Carbon and the Molecular Diversity of Life: Study Notes

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