Question 1

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

Accepted Answer

Carbon can form four covalent bonds with a variety of atoms, including itself.

Question 2

Stanley Miller's classic experiment demonstrated which concept related to the origin of life?

Accepted Answer

Abiotic synthesis of organic compounds is possible under certain conditions.

Question 3

Which of the following best describes a structural isomer?

Accepted Answer

Molecules with the same molecular formula but different covalent arrangements of their atoms.

Question 4

A pharmaceutical company discovers that only one enantiomer of a drug is biologically active. What does this suggest about the drug's interaction with biological systems?

Accepted Answer

Biological systems are sensitive to even subtle variations in molecular structure.

Question 5

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

Accepted Answer

Carboxyl group ($$-COOH)$$

Question 6

What is the molecular formula for urea, a molecule important in nitrogen metabolism?

Accepted Answer

$$CO(NH_2$)_2$$

Question 7

Which of the following statements about hydrocarbons is correct?

Accepted Answer

Hydrocarbons can undergo reactions that release large amounts of energy.

Question 8

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

Accepted Answer

The atoms bonded to the carbons are arranged in the same plane as the carbons.

Question 9

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

Accepted Answer

Nitrite group

Question 10

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 11

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

Accepted Answer

A common carbon skeleton in the form of four fused rings.

Question 12

Which of the following best explains why only one enantiomer of a drug may be effective?

Accepted Answer

Enantiomers are mirror images and only one fits the biological receptor.

Question 13

What is the result of ATP ($$\mathrm{C$$_{10}$$H_{16}N_5O$$_{13}$$P_3$$}$) reacting with water?

Accepted Answer

ATP is converted to ADP and inorganic phosphate, releasing energy.

Question 14

Which element is NOT one of the major elements found in living organisms?

Accepted Answer

Calcium (Ca)

Question 15

Which of the following molecules is a hydrocarbon?

Accepted Answer

$$C_6H_{12}$$

Question 16

Which functional group is most likely to be involved in energy transfer within cells?

Accepted Answer

Phosphate group ($$-PO_4$)

Question 17

Which type of isomerism is illustrated by molecules that have the same covalent bonds but differ in their spatial arrangement around a double bond?

Accepted Answer

Cis-trans (geometric) isomerism

Question 18

Which of the following best describes the electron configuration of carbon and its bonding capabilities?

Accepted Answer

Carbon has four valence electrons and can form four covalent bonds.

Question 19

Which of the following is a real-world example of the importance of functional groups in biological molecules?

Accepted Answer

The difference in chemical groups attached to the carbon skeleton distinguishes estradiol from testosterone.

Carbon and the Molecular Diversity of Life: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard