Q: The Central Dogma of molecular biology describes the flow of genetic information. Which sequence correctly represents this flow?

$$\text{DNA} \rightarrow \text{RNA} \rightarrow \text{Protein}$$

Question 1

Which of the following statements best explains the relationship between structure and function in cell biology?

Accepted Answer

Structure determines function, as the arrangement of macromolecules enables specific cellular activities.

Question 2

Which of the following is NOT a unifying principle of living cells?

Accepted Answer

Components move exclusively by active transport.

Question 3

Which organelle is primarily responsible for energy production and is also involved in apoptosis and oxidative stress?

Accepted Answer

Mitochondrion

Question 4

The Central Dogma of molecular biology describes the flow of genetic information. Which sequence correctly represents this flow?

Accepted Answer

$$	ext{DNA} ightarrow 	ext{RNA} ightarrow 	ext{Protein}$$

Question 5

Which of the following best describes the difference between bacterial and eukaryotic flagella?

Accepted Answer

Bacterial flagella use a rotary motor, while eukaryotic flagella use a dynein motor for movement.

Question 6

Which of the following is NOT a function of water in living cells?

Accepted Answer

Water is the main source of cellular energy.

Question 7

Which macromolecule is correctly matched with its monomer?

Accepted Answer

Polysaccharides – monosaccharides

Question 8

A mutation disrupts the formation of hydrogen bonds between amide protons and carbonyl oxygens in a protein. Which level of protein structure is most directly affected?

Accepted Answer

Secondary structure

Question 9

Which of the following statements about peroxisomes is TRUE?

Accepted Answer

Peroxisomes grow and divide similarly to mitochondria and chloroplasts.

Question 10

Which process is responsible for the movement of most small molecules within bacterial cells?

Accepted Answer

Diffusion

Question 11

Which of the following best describes the amphipathic nature of phospholipids?

Accepted Answer

They have both hydrophobic and hydrophilic regions.

Question 12

A scientist observes a cell with a nucleus, mitochondria, and a cell wall. To which group does this cell most likely belong?

Accepted Answer

Plant cell

Question 13

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

Accepted Answer

Protein and membrane trafficking via vesicle budding

Question 14

Which of the following best explains why hydrophobic side chains of proteins pack tightly in the interior of the folded protein?

Accepted Answer

To minimize exposure to water, increasing entropy of the system.

Question 15

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

Accepted Answer

Mitochondrion

Question 16

Which of the following best describes the role of telomeres in chromosomes?

Accepted Answer

They protect chromosome ends from degradation.

Question 17

Which of the following is a key difference between viruses and living cells?

Accepted Answer

Viruses lack the ability to carry out metabolism independently.

Question 18

Which of the following best describes the function of the cytoskeleton?

Accepted Answer

It provides structural support and facilitates intracellular transport.

Question 19

Which of the following chemical properties of water is most important for the formation of hydrogen bonds?

Accepted Answer

Polarity due to electronegativity differences

Question 20

A cell is observed to have extensive rough endoplasmic reticulum. Which function is this cell likely specialized for?

Accepted Answer

Protein secretion

Cell Biology Foundations: Structure, Function, and Macromolecules

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