Question 1

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

Accepted Answer

Its ability to form four covalent bonds with other atoms

Question 2

Which scientist's experiment helped to disprove the vitalism theory by demonstrating that organic molecules could be synthesized from inorganic precursors?

Accepted Answer

Stanley Miller

Question 3

Which of the following best describes the difference between organic and inorganic compounds?

Accepted Answer

Organic compounds contain carbon atoms bonded to hydrogen, while inorganic compounds generally lack this structure

Question 4

A molecule with the formula $$C_{6}H$$_{14}$$ is most likely a(n):

Accepted Answer

A hydrocarbon

Question 5

Which functional group is most likely to make a molecule hydrophilic?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 6

A molecule contains both a hydroxyl group ($$-OH) $$and a methyl group ($$-CH_{3}). $$Which statement best predicts its solubility in water?

Accepted Answer

It will have both hydrophilic and hydrophobic properties, making it amphipathic

Question 7

Which of the following is a correct example of a structural isomer?

Accepted Answer

Glucose and fructose, both with the formula $$C_{6}H$$_{12}$$O_{6}$

Question 8

Which type of isomerism is responsible for the difference in biological activity between thalidomide's enantiomers?

Accepted Answer

Enantiomerism (optical isomerism)

Question 9

Which functional group is most likely to act as a base by accepting a proton ($$H^{+}) in $$aqueous solution?

Accepted Answer

Amino group ($$-NH_{2})$$

Question 10

A molecule with a central carbon atom bonded to four different groups is called:

Accepted Answer

An asymmetric carbon (chiral center)

Question 11

Which of the following statements about hydrocarbons is correct?

Accepted Answer

Hydrocarbons are composed only of carbon and hydrogen atoms

Question 12

Which functional group is commonly found in ATP and is critical for energy transfer in cells?

Accepted Answer

Phosphate group ($$-PO_{4}^{3-})$$

Question 13

Which of the following molecules is most likely to be hydrophobic?

Accepted Answer

A molecule composed entirely of carbon and hydrogen

Question 14

Which scenario best illustrates the concept of cis-trans isomerism?

Accepted Answer

Two molecules with the same molecular formula and connectivity, but different spatial arrangement around a double bond

Question 15

Which property of carbon allows it to form both straight chains and rings in organic molecules?

Accepted Answer

Its ability to form double and triple bonds with itself

Question 16

Which of the following is NOT a reason why carbon is the backbone of biological molecules?

Accepted Answer

Carbon is the most abundant element in Earth's crust

Question 17

A patient is given a drug that contains only the D-enantiomer of a molecule. Why might this be important?

Accepted Answer

The L-enantiomer may have different or harmful biological effects

Question 18

Which of the following best explains why hydrocarbons are generally insoluble in water?

Accepted Answer

Hydrocarbons are nonpolar and water is polar

Question 19

Which functional group is most likely to make a molecule act as an acid in biological systems?

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 20

A molecule with the formula $$C_{2}H$$_{4}$$ can exist as which type of isomer?

Accepted Answer

Cis-trans isomers

Study Guide: Carbon and the Molecular Diversity of Life

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