Question 1

During cellular respiration, which molecule acts as the final electron acceptor in the electron transport system?

Accepted Answer

Oxygen ($$O_2)$$

Question 2

Which phase of the cell cycle is characterized by DNA replication?

Accepted Answer

S phase

Question 3

A mutation occurs in the gene encoding DNA ligase. Which process would be most directly affected?

Accepted Answer

Joining of Okazaki fragments during DNA replication

Question 4

Which of the following best describes the process of anabolism?

Accepted Answer

Building complex molecules from simpler ones, requiring energy

Question 5

In glycolysis, how many net ATP molecules are produced per molecule of glucose?

Accepted Answer

2

Question 6

Which enzyme is responsible for synthesizing the RNA primer during DNA replication?

Accepted Answer

Primase

Question 7

A cell is observed to be actively synthesizing proteins but not dividing. Which phase of the cell cycle is it most likely in?

Accepted Answer

G0 phase

Question 8

Which of the following is a coenzyme involved in the citric acid cycle?

Accepted Answer

Coenzyme A

Question 9

During translation, which molecule brings amino acids to the ribosome?

Accepted Answer

tRNA

Question 10

Which structure is formed by DNA wrapped around histone proteins?

Accepted Answer

Chromatin

Question 11

A patient is experiencing muscle fatigue due to anaerobic metabolism. Which compound is accumulating in their muscles?

Accepted Answer

Lactic acid

Question 12

Which of the following best describes the semiconservative model of DNA replication?

Accepted Answer

Each new DNA molecule consists of one old strand and one new strand

Question 13

Which of the following is NOT a product of the citric acid cycle?

Accepted Answer

Glucose

Question 14

Which process requires energy input and moves molecules against their concentration gradient?

Accepted Answer

Active transport

Question 15

Which molecule is produced during the preparatory step of cellular respiration, linking glycolysis to the citric acid cycle?

Accepted Answer

Acetyl-CoA

Question 16

If a mutation occurs in the promoter region of a gene, which process is most likely to be affected?

Accepted Answer

Transcription initiation

Question 17

Which of the following best describes the function of ATP synthase?

Accepted Answer

Synthesizes ATP from ADP and inorganic phosphate ($$ADP + P_i \rightarrow ATP)$$

Question 18

Which enzyme is responsible for unwinding the DNA double helix during replication?

Accepted Answer

Helicase

Question 19

A cell is exposed to a restriction enzyme. What is the most likely outcome?

Accepted Answer

DNA is cut at specific sequences

Question 20

Which of the following is a correct sequence of events in protein synthesis?

Accepted Answer

Transcription $$\rightarrow$$ Translation $$\rightarrow$$ Protein folding

Cellular Metabolism, Cell Cycle, DNA Replication, and Protein Synthesis: Key Concepts and Terminology

Study Guide - Practice Questions