Question 1

Which of the following best describes the hierarchical organization of life, in increasing order of complexity?

Accepted Answer

Atoms, molecules, macromolecules, organelles, cells, tissues, organs, organisms

Question 2

Which element is NOT one of the six most abundant elements in living organisms (CHNOPS)?

Accepted Answer

Calcium

Question 3

Which of the following statements about viruses is correct?

Accepted Answer

Viruses are composed of nucleic acid surrounded by a protein coat.

Question 4

Which historical event demonstrated that organic molecules could be synthesized from inorganic compounds, challenging the concept of vitalism?

Accepted Answer

The synthesis of urea from ammonium cyanate

Question 5

Which of the following is a correct statement about the Central Dogma of Molecular Biology?

Accepted Answer

Information flows from DNA to RNA to protein.

Question 6

Which of the following is the correct general formula for carbohydrates?

Accepted Answer

$$\mathrm{CH_2O}$$

Question 7

Which of the following best describes a peptide bond?

Accepted Answer

A covalent bond between the amino group of one amino acid and the carboxyl group of another

Question 8

Which of the following is NOT a function of proteins?

Accepted Answer

Storing genetic information

Question 9

Which of the following statements about nucleotides is correct?

Accepted Answer

Nucleotides are composed of a five-carbon sugar, a nitrogenous base, and a phosphate group.

Question 10

Which of the following best describes the structure of a lipid bilayer?

Accepted Answer

Hydrophilic heads face outward, hydrophobic tails face inward

Question 11

Which organelle is the main site of energy transduction in aerobic eukaryotic cells?

Accepted Answer

Mitochondrion

Question 12

Which of the following equations correctly relates the Gibbs free energy change to enthalpy and entropy?

Accepted Answer

$$\Delta G = \Delta H - T \Delta S$$

Question 13

A reaction has a negative Gibbs free energy change ($$\Delta G \u003c 0). $$What does this indicate about the reaction?

Accepted Answer

The reaction is spontaneous and releases energy.

Question 14

Which of the following is true about the equilibrium constant ($$K_{eq}) $$for a chemical reaction?

Accepted Answer

$$K_{eq} is $$the ratio of the concentrations of products to reactants at equilibrium.

Question 15

Which of the following best explains why macromolecules such as proteins and polysaccharides have properties different from their monomers?

Accepted Answer

The structure and interactions of the polymer create new emergent properties.

Question 16

Which of the following is a correct statement about the flow of energy in living systems?

Accepted Answer

Photosynthetic organisms capture sunlight to synthesize organic compounds.

Question 17

Which of the following best describes the role of the Golgi apparatus in eukaryotic cells?

Accepted Answer

It modifies and sorts proteins received from the endoplasmic reticulum.

Question 18

Which of the following is a correct description of a glycosidic bond?

Accepted Answer

A covalent bond between two monosaccharides

Question 19

Which of the following is a correct equation relating the standard Gibbs free energy change ($$\Delta G^\circ) to $$the equilibrium constant ($$K_{eq}$$)?

Accepted Answer

$$\Delta G^\circ = -RT \ln K_{eq}$$

Question 20

Which of the following statements about fatty acids is correct?

Accepted Answer

Fatty acids are long-chain hydrocarbons with a carboxylate group at one end.

Foundations of Biochemistry: Structure, Function, and Energetics

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