Q: Which equation correctly represents the process of cellular respiration carried out by mitochondria?

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

Question 1

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

Accepted Answer

Smaller cells have a higher surface area-to-volume ratio, which facilitates efficient exchange of materials with their environment.

Question 2

A scientist wants to study the internal structure of mitochondria at the highest possible resolution. Which microscope should they use, and what is its approximate resolution?

Accepted Answer

Transmission Electron Microscope; $$0.1\ \mathrm{nm}$$

Question 3

Which of the following is NOT a difference between prokaryotic and eukaryotic cells?

Accepted Answer

Prokaryotic cells have a nucleus, while eukaryotic cells do not.

Question 4

Which organelle is responsible for synthesizing proteins using mRNA as a template, and can be found both free in the cytosol and attached to the endoplasmic reticulum?

Accepted Answer

Ribosome

Question 5

A cell is observed to have a large central vacuole, chloroplasts, and a cell wall. Which type of cell is this most likely to be?

Accepted Answer

Plant cell

Question 6

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

Accepted Answer

It modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.

Question 7

Which structure in animal cells anchors organelles and reinforces cell shape, and is made of fibrous proteins supercoiled into cables?

Accepted Answer

Intermediate filaments

Question 8

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

Accepted Answer

Detoxifying harmful compounds and converting hydrogen peroxide ($$H_2O_2) $$into water ($$H_2O)$$

Question 9

Which of the following best explains why antibiotics like penicillin can target bacterial cells without harming human cells?

Accepted Answer

Bacterial ribosomes are structurally different from eukaryotic ribosomes, allowing antibiotics to selectively inhibit bacterial protein synthesis.

Question 10

A mutation causes a cell to lose its ability to produce dynein motor proteins. Which cellular process would be most directly affected?

Accepted Answer

Movement of cilia and flagella

Question 11

Which equation correctly represents the process of cellular respiration carried out by mitochondria?

Accepted Answer

$$C_6H_{12}O_6$ + 6O_2 ightarrow 6CO_2 + 6H_2O + 	ext{ATP}$$

Question 12

Which of the following is a major component of the extracellular matrix in animal cells and is responsible for cell-to-cell communication and structural support?

Accepted Answer

Glycoproteins

Question 13

Which cell junction prevents the movement of materials between adjacent animal cells, forming a barrier?

Accepted Answer

Tight junction

Question 14

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

Accepted Answer

Mitochondria and chloroplasts originated as free-living prokaryotes that were engulfed by ancestral eukaryotic cells and became organelles.

Question 15

A cell is observed to have a plasma membrane composed of a phospholipid bilayer with embedded proteins. Which property does this structure confer to the cell membrane?

Accepted Answer

Selective permeability, allowing only certain molecules to pass through

Question 16

Which cytoskeletal fiber is primarily responsible for chromosome separation during cell division and serves as a 'highway' for organelle movement?

Accepted Answer

Microtubules

Question 17

Which organelle is most likely to be abundant in cells that secrete large amounts of insulin, such as pancreatic beta cells?

Accepted Answer

Rough endoplasmic reticulum

Question 18

Which of the following is a function of the central vacuole in plant cells?

Accepted Answer

Storage of nutrients and waste products, maintenance of turgor pressure, and breakdown of macromolecules

Question 19

Which of the following structures is found in plant cells but NOT in animal cells?

Accepted Answer

Cell wall

Question 20

A researcher observes a cell with a nucleus, mitochondria, and chloroplasts. Which domain of life does this cell belong to?

Accepted Answer

Eukarya

A Tour of the Cell: Structure, Function, and Microscopy

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