Question 1

Which of the following statements best explains why carbon is able to form such a wide variety of molecules?

Accepted Answer

Carbon has four valence electrons, allowing it to form up to four covalent bonds with other atoms.

Question 2

The Miller-Urey experiment demonstrated that organic molecules could be synthesized from inorganic precursors. Which combination of gases was used in their experiment?

Accepted Answer

H$$_2$$, CH$$_4$$, NH$$_3$$, and H$$_2O$$

Question 3

Which of the following best describes a hydrocarbon?

Accepted Answer

A molecule containing only carbon and hydrogen atoms.

Question 4

Which of the following is a correct representation of carbon dioxide using Lewis dot structures?

Accepted Answer

$$O=C=O$$

Question 5

Which functional group is correctly matched with its property?

Accepted Answer

Hydroxyl group: polar

Question 6

A molecule with the formula C$$_5H$_{12}$$ can have different structures. These are called:

Accepted Answer

Isomers

Question 7

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

Accepted Answer

Structural isomers differ in the arrangement of atoms; cis-trans isomers differ in the spatial arrangement around a double bond.

Question 8

Which of the following functional groups is responsible for making a molecule behave as an acid by releasing H$$^+$$ ions?

Accepted Answer

Carboxyl group

Question 9

ATP is often referred to as the 'energy currency' of the cell. What happens when ATP is hydrolyzed?

Accepted Answer

ATP is converted to ADP, a phosphate group, and energy is released.

Question 10

Which of the following best explains why functional groups are important in organic molecules?

Accepted Answer

They determine the physical and chemical properties of the molecule.

Question 11

Which of the following is a property of the phosphate group?

Accepted Answer

It is charged and can release H$$^+$$ ions, making solutions acidic.

Question 12

A molecule contains both an amino group and a carboxyl group. Which type of biological molecule is this most likely to be?

Accepted Answer

A protein (amino acid)

Question 13

Which of the following best describes the process by which ADP is converted back to ATP?

Accepted Answer

A phosphate group is added to ADP, and energy is required for this process.

Question 14

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

Accepted Answer

Nitrite

Question 15

Which of the following best explains why hydrocarbons are a major component of fossil fuels?

Accepted Answer

They contain only carbon and hydrogen, which store large amounts of energy in their bonds.

Question 16

Which of the following is a correct statement about the methyl group?

Accepted Answer

It is nonpolar and often affects gene expression when attached to DNA.

Question 17

Which of the following best describes the role of ATP in cellular processes?

Accepted Answer

ATP provides energy for cellular work by transferring a phosphate group to other molecules.

Question 18

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

Accepted Answer

The presence of a hydroxyl group in ethanol makes it soluble in water, allowing it to be used as an antiseptic.

Carbon and the Molecular Diversity of Life: Chapter 4 Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards