Q: Which equation correctly represents the overall reaction for aerobic cellular respiration?

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} \rightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + \text{energy}$$

Question 1

Which of the following best explains why phospholipids form bilayers in aqueous environments?

Accepted Answer

Phospholipids have both hydrophilic heads and hydrophobic tails, causing them to arrange with heads facing water and tails facing inward.

Question 2

During cellular respiration, which molecule is the final electron acceptor in the electron transport chain?

Accepted Answer

Oxygen

Question 3

Which process directly produces the most ATP during aerobic respiration?

Accepted Answer

Electron transport chain and oxidative phosphorylation

Question 4

A mutation causes a eukaryotic cell to lack functional cyclin-dependent kinases (CDKs). What is the most likely consequence?

Accepted Answer

The cell will be unable to progress through the cell cycle checkpoints, halting division.

Question 5

Which of the following best describes the difference between prokaryotic and eukaryotic transcription?

Accepted Answer

Eukaryotic transcription involves RNA processing (splicing, capping, polyadenylation), while prokaryotic transcription does not.

Question 6

Which equation correctly represents the overall reaction for aerobic cellular respiration?

Accepted Answer

$$\mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$} ightarrow 6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{energy}$$

Question 7

A cell is exposed to a toxin that inhibits ATP synthase. Which process will be most directly affected?

Accepted Answer

Oxidative phosphorylation

Question 8

Which of the following statements about signal transduction pathways is correct?

Accepted Answer

Signal transduction can amplify a signal, allowing a small number of signaling molecules to produce a large cellular response.

Question 9

Which of the following best explains why DNA replication is considered 'semi-conservative'?

Accepted Answer

Each new DNA molecule contains one original strand and one newly synthesized strand.

Question 10

Which of the following is NOT a function of the plasma membrane?

Accepted Answer

Synthesizing proteins for the cell

Question 11

A patient has a genetic disorder that prevents the formation of functional sodium-potassium pumps. What is the most likely cellular consequence?

Accepted Answer

The cell will lose its ability to maintain proper ion gradients, affecting nerve impulse transmission.

Question 12

Which of the following best describes the role of tRNA during translation?

Accepted Answer

tRNA carries amino acids to the ribosome and matches them to the mRNA codon via its anticodon.

Question 13

Which of the following is a correct description of the function of cyclins in the cell cycle?

Accepted Answer

Cyclins activate CDKs, which regulate progression through cell cycle checkpoints.

Question 14

Which of the following is a correct sequence of events in gene expression in eukaryotes?

Accepted Answer

Transcription → RNA processing → Translation

Question 15

Which of the following best explains why enzymes are considered biological catalysts?

Accepted Answer

Enzymes speed up chemical reactions by lowering the activation energy without being consumed.

Question 16

A cell is placed in a hypotonic solution. What will most likely happen to the cell?

Accepted Answer

The cell will gain water and swell, possibly bursting.

Question 17

Which of the following is a correct representation of the formula for photosynthesis?

Accepted Answer

$$6\mathrm{CO_2$} + 6\mathrm{H_2O} + 	ext{light energy} ightarrow \mathrm{C_6H_{12}O_6$} + 6\mathrm{O_2$}$$

Question 18

Which of the following statements about genetic mutations is correct?

Accepted Answer

Mutations can be beneficial, neutral, or harmful depending on their effect on protein function.

Question 19

A researcher discovers a new protein that is only produced when a specific signaling molecule binds to a cell surface receptor. Which process is most likely responsible for the production of this protein?

Accepted Answer

Signal transduction pathway activating gene transcription

Question 20

Which of the following best describes the role of the citric acid cycle in cellular respiration?

Accepted Answer

It generates electron carriers (NADH and FADH2) that feed electrons into the electron transport chain.

General Biology Final Exam Study Guide: Cells, Bioenergetics, Genetics, and Protein Synthesis

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