Question 1

According to the cell theory, which of the following statements is TRUE?

Accepted Answer

All living things are composed of cells, and all cells arise from pre-existing cells.

Question 2

Why are cells generally small in size? Choose the BEST explanation.

Accepted Answer

A small cell has a higher surface area to volume ratio, allowing efficient exchange of materials with its environment.

Question 3

A cube-shaped cell has a side length of $$2\ \mathrm{mm}. $$What is its surface area to volume ratio?

Accepted Answer

$$3:1$$

Question 4

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 5

A scientist observes a cell with a single, circular chromosome and no membrane-bound organelles. Which domain does this cell most likely belong to?

Accepted Answer

Bacteria

Question 6

If a cell's surface area is $$24\ \mathrm{mm}^2$$ and its volume is $$8\ \mathrm{mm}^3$$, what is its surface area to volume ratio?

Accepted Answer

$$3:1$$

Question 7

Which of the following best explains why a large cell would have difficulty surviving?

Accepted Answer

Its surface area to volume ratio is too low, making it inefficient at exchanging materials with its environment.

Question 8

Which of the following structures is found in both prokaryotic and eukaryotic cells?

Accepted Answer

Ribosomes

Question 9

A student is using a light microscope to observe cells. Which of the following could they NOT see with this microscope?

Accepted Answer

Viruses

Question 10

Which metric prefix represents $$0.000001 ($$one millionth) of a base unit?

Accepted Answer

Micro ($$\mu)$$

Question 11

If a cell's length increases from $$1\ \mathrm{mm} to$$ $$2\ \mathrm{mm}$$, by what factor does its volume increase?

Accepted Answer

8

Question 12

Which of the following statements about the hereditary information in cells is correct?

Accepted Answer

Hereditary information (DNA) is passed from parent to daughter cells during cell division.

Question 13

Which of the following best describes the relationship between cell size and the rate of diffusion of substances within the cell?

Accepted Answer

As cell size increases, the rate of diffusion becomes less efficient due to increased distance.

Question 14

Which of the following is NOT a part of the modern cell theory?

Accepted Answer

All cells have a cell wall.

Question 15

A cube-shaped cell has a surface area of $$48\ \mathrm{mm}^2$$ and a volume of $$8\ \mathrm{mm}^3. If $$the cell doubles its length, what will be the new surface area to volume ratio?

Accepted Answer

$$1.5:1$$

Question 16

Which of the following is a correct comparison between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells are typically 10-100 $$\mum in $$diameter, while prokaryotic cells are 1-5 $$\mum.$$

Question 17

Which of the following best explains why multicellular organisms can be larger than unicellular organisms?

Accepted Answer

They are composed of many small cells, each maintaining a high surface area to volume ratio.

Question 18

Which of the following is a real-world consequence of the surface area to volume ratio in cells?

Accepted Answer

Red blood cells are small and biconcave to maximize oxygen exchange.

Question 19

Which of the following is NOT a feature shared by all cells?

Accepted Answer

A nucleus

Question 20

A researcher wants to observe the structure of ribosomes. Which type of microscope should they use?

Accepted Answer

Electron microscope

Cell Theory and the Structure of Cells

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