Q: The flow of genetic information in a eukaryotic cell can be summarized as:

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

Question 1

Which of the following statements best summarizes the modern cell theory?

Accepted Answer

All living organisms are composed of one or more cells, and all cells arise from pre-existing cells.

Question 2

A scientist discovers a new organism with DNA floating freely in the cytoplasm, no membrane-bound organelles, and a cell wall. Which type of cell is this organism most likely composed of?

Accepted Answer

Prokaryotic cell

Question 3

Which of the following is a key difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have membrane-bound organelles, while prokaryotic cells do not.

Question 4

If a mutation prevents a eukaryotic cell from producing functional ribosomes, which process would be most directly affected?

Accepted Answer

Protein synthesis

Question 5

Which of the following best explains why compartmentalization (the presence of membrane-bound organelles) is advantageous for eukaryotic cells?

Accepted Answer

It allows for specialized environments that increase the efficiency of cellular processes.

Question 6

A researcher is studying a cell that contains mitochondria, a nucleus, and a plasma membrane, but no cell wall. Which type of organism is this cell most likely from?

Accepted Answer

Animal

Question 7

Which of the following is NOT a component found in all cells (both prokaryotic and eukaryotic)?

Accepted Answer

Mitochondria

Question 8

The flow of genetic information in a eukaryotic cell can be summarized as:

Accepted Answer

$DNA ightarrow RNA ightarrow 	ext{Protein}$

Question 9

Which of the following scenarios best illustrates the concept that all cells arise from pre-existing cells?

Accepted Answer

A bacterial cell divides to produce two identical daughter cells.

Question 10

Which of the following is a real-world implication of the cell theory?

Accepted Answer

Diseases can be understood as disruptions in normal cell function.

Question 11

A scientist observes a cell with the following features: a single circular DNA molecule, ribosomes, and a cell wall, but no internal membrane-bound compartments. Which structure is most likely absent from this cell?

Accepted Answer

Mitochondria

Question 12

Which of the following best describes the function of the plasma membrane in both prokaryotic and eukaryotic cells?

Accepted Answer

It acts as a selectively permeable barrier, controlling the movement of substances in and out of the cell.

Question 13

Which of the following is an example of cell specialization in multicellular organisms?

Accepted Answer

Red blood cells transporting oxygen in humans.

Question 14

Which of the following is a correct statement about ribosomes?

Accepted Answer

They are present in both prokaryotic and eukaryotic cells and are responsible for protein synthesis.

Question 15

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 16

Which of the following best explains why viruses are not considered living organisms according to cell theory?

Accepted Answer

They are not composed of cells and cannot reproduce independently.

Question 17

If a eukaryotic cell's mitochondria are damaged, which cellular process would be most directly affected?

Accepted Answer

ATP production through cellular respiration

Question 18

Which of the following is a function of the cell wall in prokaryotic cells?

Accepted Answer

It provides structural support and protection to the cell.

Question 19

Which of the following best describes the evolutionary significance of the fact that all cells share certain basic features (such as plasma membrane, ribosomes, and genetic material)?

Accepted Answer

It suggests that all life shares a common ancestor.

Question 20

A student claims that a cell with a nucleus, mitochondria, and chloroplasts must be a bacterial cell. Which evidence best refutes this claim?

Accepted Answer

Bacterial cells do not have membrane-bound organelles such as a nucleus, mitochondria, or chloroplasts.

Cell Structure and Cell Theory: General Biology I Study Notes

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