Question 1

Which of the following statements best describes the significance of Friedrich Wöhler's experiment in 1828, where ammonium cyanate was converted to urea?

Accepted Answer

It showed that organic compounds could be synthesized from inorganic precursors, challenging the concept of vitalism.

Question 2

Which of the following is NOT a characteristic of lipids?

Accepted Answer

They are polymers of amino acids.

Question 3

Which functional group is present in both ATP and nucleic acids and is critical for their biological function?

Accepted Answer

Phosphoric acid ester

Question 4

Which of the following best explains why glucose is classified as a carbohydrate?

Accepted Answer

It has the general formula $$(CH_2O)_n$$ where $$n \geq 3.$$

Question 5

Which of the following statements about the RNA-world theory is correct?

Accepted Answer

RNA was capable of both encoding genetic information and catalyzing its own replication.

Question 6

Which of the following best distinguishes prokaryotic cells from eukaryotic cells?

Accepted Answer

Prokaryotes lack membrane-enclosed organelles such as mitochondria and endoplasmic reticulum.

Question 7

Which of the following is a correct statement about the spontaneity of a chemical reaction?

Accepted Answer

A reaction is spontaneous if $$\Delta G \u003c 0.$$

Question 8

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

Accepted Answer

ATP serves as the energy currency of the cell, storing energy in its phosphoric anhydride bonds.

Question 9

Which of the following is a correct pairing of a monomer and its corresponding polymer?

Accepted Answer

Nucleotide → Nucleic acid

Question 10

A scientist is studying a cell that contains a nucleus, mitochondria, and chloroplasts. To which kingdom does this organism most likely belong?

Accepted Answer

Plantae

Question 11

Which of the following best describes the relationship between enthalpy, entropy, and free energy in a biochemical reaction?

Accepted Answer

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

Question 12

Which of the following is an example of mutualistic symbiosis?

Accepted Answer

A fungus and an alga forming a lichen

Question 13

Which of the following elements is most abundant in living organisms relative to its abundance in the universe?

Accepted Answer

Oxygen

Question 14

Which of the following best explains why the formation of a cell membrane was a key event in the origin of life?

Accepted Answer

It allowed for the separation of genetic material from the environment, enabling the development of complex cellular processes.

Question 15

Which of the following is a correct statement about the directionality of informational macromolecules?

Accepted Answer

DNA and RNA are synthesized from the 5' to 3' direction.

Question 16

A reaction has $$\Delta H = -50 kJ/$$mol and $$\Delta S = -0.1 kJ/($$mol·K). At what temperature (in K) does the reaction become nonspontaneous?

Accepted Answer

At $$T \u003e 500 K$$

Question 17

Which of the following best describes the function of ribosomes in both prokaryotic and eukaryotic cells?

Accepted Answer

They are involved in the synthesis of proteins.

Question 18

Which of the following is a plausible explanation for the greater abundance of carbon in living organisms compared to its abundance in the universe?

Accepted Answer

Carbon forms strong, stable covalent bonds, allowing for the formation of complex biomolecules.

Question 19

Which of the following best describes the process by which ATP releases energy for cellular work?

Accepted Answer

ATP is hydrolyzed to ADP and a phosphate ion, releasing energy stored in phosphoric anhydride bonds.

Question 20

Which of the following is a correct statement about the classification of living organisms?

Accepted Answer

The five-kingdom system includes Monera, Protista, Fungi, Plantae, and Animalia.

Biochemistry and the Organization of Cells: Chapter 1 Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards