Question 1

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

Accepted Answer

Its four valence electrons, allowing it to form up to four covalent bonds

Question 2

Which of the following best describes a hydrocarbon?

Accepted Answer

A molecule composed only of carbon and hydrogen

Question 3

Why are isomers important in the pharmaceutical industry?

Accepted Answer

Different isomers can have drastically different effects in organisms

Question 4

Which functional group is present in both estradiol and testosterone, but differs in arrangement, leading to different biological effects?

Accepted Answer

Carbonyl group

Question 5

Which of the following is NOT a class of large biological molecules formed by carbon skeletons?

Accepted Answer

Salts

Question 6

A molecule with the formula $$C_4H_{10}$$ can exist as both butane and isobutane. What type of isomerism does this represent?

Accepted Answer

Structural isomerism

Question 7

Which of the following functional groups is characterized by the formula $$-COOH$$?

Accepted Answer

Carboxyl group

Question 8

ATP (adenosine triphosphate) is an important molecule in cells because:

Accepted Answer

It provides energy for cellular work when reacting with water

Question 9

Which of the following best explains why hydrocarbons are a good source of energy?

Accepted Answer

They have many nonpolar covalent bonds that release energy during oxidation

Question 10

Which of the following is a correct statement about enantiomers?

Accepted Answer

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

Question 11

A pharmaceutical company develops two forms of a drug: S-ibuprofen and R-ibuprofen. Only S-ibuprofen is effective. What concept does this illustrate?

Accepted Answer

Enantiomer specificity in biological systems

Question 12

Which of the following molecules contains a carbonyl group?

Accepted Answer

Acetone ($$CH_3COCH_3)$$

Question 13

Which functional group is most likely to act as an acid by donating a proton ($$H^+) in $$aqueous solution?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 14

Which of the following best describes the difference between cis and trans isomers?

Accepted Answer

Cis isomers have functional groups on the same side of a double bond, trans isomers have them on opposite sides

Question 15

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

Accepted Answer

Chloride group

Question 16

A molecule with a carbon skeleton arranged in a ring structure is most likely to be:

Accepted Answer

Cyclohexane

Question 17

Which of the following statements about carbon is FALSE?

Accepted Answer

Carbon can only bond with hydrogen

Question 18

Which functional group is most likely to be found in energy-carrying molecules like ATP?

Accepted Answer

Phosphate group ($$-PO_4$)

Question 19

Which of the following best explains why organisms are sensitive to subtle variations in molecular structure?

Accepted Answer

Small changes in structure can lead to large changes in function and biological activity

Question 20

Which of the following is a correct multi-step reasoning about ATP hydrolysis?

Accepted Answer

ATP hydrolysis involves the removal of a phosphate group, producing ADP and inorganic phosphate, and releases energy for cellular work: $$ATP + H_2O \rightarrow ADP + P_i + energy$$

Carbon and the Molecular Diversity of Life (Chapter 4) – Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards