Q: Which of the following equations correctly represents the process of ATP synthesis in mitochondria?

$$ \text{ADP} + \text{P}_i + \text{energy} \rightarrow \text{ATP} + \text{H}_2\text{O} $$

Question 1

Which of the following best explains why eukaryotic cells are able to compartmentalize incompatible chemical reactions?

Accepted Answer

They contain membrane-bound organelles that separate different cellular processes.

Question 2

A scientist observes a cell with the following features: a plasma membrane, ribosomes, a single circular chromosome, and a cell wall made of peptidoglycan. To which domain does this cell most likely belong?

Accepted Answer

Bacteria

Question 3

Which structure is responsible for synthesizing proteins that are exported from the cell?

Accepted Answer

Rough endoplasmic reticulum

Question 4

A mutation prevents the formation of acid hydrolases in an animal cell. Which organelle's function would be most directly affected?

Accepted Answer

Lysosome

Question 5

Which of the following is a key difference between plant and animal cells?

Accepted Answer

Animal cells have lysosomes, while plant cells typically have large central vacuoles.

Question 6

According to the endosymbiosis theory, which organelle originated from a free-living prokaryote engulfed by an ancestral eukaryotic cell?

Accepted Answer

Mitochondrion

Question 7

Which of the following best describes the function of the Golgi apparatus?

Accepted Answer

It processes, sorts, and ships proteins synthesized in the rough ER.

Question 8

A cell is observed to have fimbriae and flagella. What is the most likely function of these structures?

Accepted Answer

Fimbriae are used for attachment, and flagella are used for movement.

Question 9

Which of the following equations correctly represents the process of ATP synthesis in mitochondria?

Accepted Answer

$$ 	ext{ADP} + 	ext{P}_i + 	ext{energy} ightarrow 	ext{ATP} + 	ext{H}_2	ext{O} $$

Question 10

A toxin disrupts the function of the nuclear pores in a eukaryotic cell. Which process would be most directly affected?

Accepted Answer

Transport of mRNA from the nucleus to the cytoplasm

Question 11

Which of the following statements about ribosomes is correct?

Accepted Answer

They are macromolecular machines that perform protein synthesis.

Question 12

A plant cell is placed in a solution that causes water to enter the cell. Which organelle is primarily responsible for storing this excess water?

Accepted Answer

Vacuole

Question 13

Which of the following best describes the structural polarity of the Golgi apparatus?

Accepted Answer

It has a cis side facing the nucleus and a trans side facing the plasma membrane.

Question 14

Which of the following is NOT a function of the smooth endoplasmic reticulum (SER)?

Accepted Answer

Synthesis of proteins for export

Question 15

Which of the following best explains why mitochondria and chloroplasts contain their own DNA and ribosomes?

Accepted Answer

They originated from free-living prokaryotes through endosymbiosis.

Question 16

A bacterial cell is exposed to an antibiotic that disrupts peptidoglycan synthesis. What is the most likely effect on the cell?

Accepted Answer

It will lose structural support and may burst due to osmotic pressure.

Question 17

Which of the following correctly matches the organelle with its primary function?

Accepted Answer

Lysosome – digestion of macromolecules

Question 18

Which of the following is a unique feature of prokaryotic cells compared to eukaryotic cells?

Accepted Answer

DNA located in a nucleoid region

Question 19

A mutation causes a eukaryotic cell to lack nuclear lamina. Which process would be most directly affected?

Accepted Answer

Maintenance of nuclear shape and organization

Question 20

Which of the following best describes the path of a secretory protein from synthesis to exocytosis?

Accepted Answer

Rough ER → Golgi apparatus → vesicle → plasma membrane

Inside the Cell: Structure and Function of Organelles

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