Q: Which equation correctly represents the importance of surface area-to-volume ratio for cell efficiency?

$\text{Surface Area-to-Volume Ratio} = \frac{\text{Surface Area}}{\text{Volume}}$

Q: Which equation correctly represents the process of cellular respiration in mitochondria?

$\text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{ATP}$

Question 1

Which of the following best explains why electron microscopes can resolve subcellular structures that light microscopes cannot?

Accepted Answer

Electron microscopes use electrons, which have a much shorter wavelength than visible light, allowing for higher resolution.

Question 2

A scientist wants to study the surface features of a virus particle. Which microscopy technique should they use and why?

Accepted Answer

Scanning Electron Microscopy (SEM), because it provides detailed 3D images of surface structures.

Question 3

Which organelle is primarily responsible for breaking down fatty acids and detoxifying harmful substances such as alcohol?

Accepted Answer

Peroxisome

Question 4

During cell fractionation, differential centrifugation is used to isolate specific organelles. If a scientist wants to isolate mitochondria, which step should they use?

Accepted Answer

The second centrifugation at medium speed, which pellets mitochondria.

Question 5

Which equation correctly represents the importance of surface area-to-volume ratio for cell efficiency?

Accepted Answer

$	ext{Surface Area-to-Volume Ratio} = \frac{	ext{Surface Area}}{	ext{Volume}}$

Question 6

Which of the following statements about eukaryotic cells is TRUE?

Accepted Answer

Eukaryotic cells have compartmentalization that allows simultaneous, incompatible processes.

Question 7

A mutation disrupts the nuclear lamina in a cell. Which process would be most directly affected?

Accepted Answer

Structural support and organization of the nucleus

Question 8

Which organelle is the main site for synthesis of lipids and steroids, and also detoxifies drugs and poisons?

Accepted Answer

Smooth endoplasmic reticulum

Question 9

A cell is observed to have a large number of contractile vacuoles. What is the most likely environment for this cell?

Accepted Answer

A freshwater environment, where excess water must be pumped out

Question 10

Which of the following best describes the endosymbiotic theory for the origin of mitochondria and chloroplasts?

Accepted Answer

They evolved from free-living bacteria that formed a symbiotic relationship with ancestral eukaryotic cells.

Question 11

Which cytoskeletal component is primarily responsible for chromosome separation during mitosis?

Accepted Answer

Microtubules

Question 12

A cell is unable to synthesize ribosomal RNA (rRNA). Which structure is most likely defective?

Accepted Answer

Nucleolus

Question 13

Which of the following is a function of the Golgi apparatus?

Accepted Answer

Modifies, sorts, and packages proteins and lipids for delivery to specific destinations

Question 14

Which equation correctly represents the process of cellular respiration in mitochondria?

Accepted Answer

$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 	ext{ATP}$

Question 15

Which structure in plant cells allows for the passage of water, ions, and RNA between adjacent cells?

Accepted Answer

Plasmodesmata

Question 16

Which cytoskeletal element is most important for maintaining cell shape and resisting mechanical stress?

Accepted Answer

Intermediate filaments

Question 17

A cell is observed to have defective lysosomes. Which process would be most directly impaired?

Accepted Answer

Autophagy and cellular digestion

Question 18

Which of the following best describes the function of microfilaments in a migrating cell?

Accepted Answer

They interact with myosin to enable cell crawling and movement.

Question 19

Which of the following is NOT a component of the endomembrane system?

Accepted Answer

Mitochondria

Cell Structure, Microscopy, and Organelles: Comprehensive Study Notes for General Biology

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