Question 1

Which of the following best describes the main finding of Stanley Miller's 1953 experiment on the origin of life?

Accepted Answer

It demonstrated that simple organic compounds could be synthesized abiotically from atmospheric gases using electrical energy.

Question 2

Which of the following is NOT a limitation on cell size?

Accepted Answer

The number of mitochondria present in the cell

Question 3

A cell is shaped as a cube with a side length $$s. $$Which formula correctly gives the surface area to volume ratio for this cell?

Accepted Answer

$$\frac{6s^2$}{s^3$}$$

Question 4

Which of the following statements about the three domains of life is correct?

Accepted Answer

Bacteria and Archaea are as divergent from each other as humans are from bacteria.

Question 5

Which feature is unique to eukaryotic cells and not found in either bacteria or archaea?

Accepted Answer

Membrane-bounded organelles

Question 6

A scientist observes a cell with a cell wall composed of peptidoglycan, circular DNA, and 70S ribosomes. To which domain does this cell most likely belong?

Accepted Answer

Bacteria

Question 7

Which of the following is a function of the smooth endoplasmic reticulum (ER) in eukaryotic cells?

Accepted Answer

Synthesis of lipids and steroids

Question 8

Which organelle is responsible for the oxidative breakdown of long-chain fatty acids and detoxification of harmful compounds in animal cells?

Accepted Answer

Peroxisome

Question 9

According to the endosymbiont theory, which of the following is evidence that mitochondria evolved from ancient bacteria?

Accepted Answer

Mitochondria have circular DNA and 70S ribosomes similar to bacteria.

Question 10

Which process is unique to eukaryotic cells and allows them to exchange materials with the external environment via membrane fusion?

Accepted Answer

Exocytosis and endocytosis

Question 11

A mutation prevents the formation of microvilli in intestinal mucosal cells. Which cellular function would be most directly affected?

Accepted Answer

Absorption of nutrients due to decreased surface area

Question 12

Which of the following best explains why cells are typically small in size?

Accepted Answer

To maximize the surface area to volume ratio for efficient exchange of materials

Question 13

Which of the following statements about viruses is TRUE?

Accepted Answer

Viruses lack cytoplasm, organelles, and ribosomes, and can only reproduce using a host cell's machinery.

Question 14

Which of the following is a distinguishing feature of prions compared to viruses and viroids?

Accepted Answer

Prions are infectious proteins without nucleic acids.

Question 15

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

Accepted Answer

Processing and packaging secretory proteins and synthesizing complex polysaccharides

Question 16

A plant cell is observed to have a large central vacuole. What is the primary function of this structure?

Accepted Answer

Maintaining turgor pressure to prevent wilting

Question 17

Which of the following is a correct match between a cell structure and its function?

Accepted Answer

Lysosome – digestion of biological molecules using hydrolases

Question 18

Which of the following is a property shared by mitochondria, chloroplasts, and bacteria, supporting the endosymbiont theory?

Accepted Answer

Presence of circular DNA and 70S ribosomes

Question 19

Which of the following is a function of the cytoskeleton in eukaryotic cells?

Accepted Answer

Providing structural support and facilitating movement of organelles

Question 20

Which of the following best explains why eukaryotic cells can grow larger than prokaryotic cells?

Accepted Answer

Eukaryotic cells use compartmentalization and active transport to overcome diffusion limitations.

Cells and Organelles: Structure, Function, and Evolution

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