Q: Which of the following equations correctly represents how to calculate the total magnification ($$M_{total}) of a $$light microscope?

$$M_{total} = \text{objective lens magnification} \times \text{ocular lens magnification}$$

Question 1

Which of the following best describes the main difference between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have DNA enclosed in a double-membrane nucleus, while prokaryotic cells have unbound DNA.

Question 2

A scientist wants to observe the internal structure of mitochondria in a eukaryotic cell. Which type of microscope should they use and why?

Accepted Answer

Transmission electron microscope (TEM), because it allows visualization of internal cell structures at high resolution.

Question 3

Which of the following is NOT a function of the endoplasmic reticulum (ER) in eukaryotic cells?

Accepted Answer

Packaging and sorting of proteins for secretion.

Question 4

A mutation prevents the formation of the nuclear lamina in a cell. Which of the following is the most likely consequence?

Accepted Answer

The shape of the nucleus will be abnormal and nuclear stability compromised.

Question 5

Which organelle is primarily responsible for digesting macromolecules and damaged organelles within the cell?

Accepted Answer

Lysosome

Question 6

If a plant cell's central vacuole is damaged and cannot function, which of the following is the most likely effect?

Accepted Answer

The cell will lose its ability to store ions and maintain turgor pressure.

Question 7

Which of the following best explains why electron microscopes can resolve smaller structures than light microscopes?

Accepted Answer

Electrons have a much shorter wavelength than visible light, allowing higher resolution.

Question 8

A cell is observed to have a plasma membrane, ribosomes, and a nucleoid region, but no membrane-bound organelles. Which type of cell is this most likely to be?

Accepted Answer

Prokaryotic cell

Question 9

Which of the following equations correctly represents how to calculate the total magnification ($$M_{total}) of a $$light microscope?

Accepted Answer

$$M_{total} = 	ext{objective lens magnification} 	imes 	ext{ocular lens magnification}$$

Question 10

A researcher is studying a disease that causes the Golgi apparatus to malfunction. Which of the following cellular processes is most likely to be directly affected?

Accepted Answer

Protein packaging and modification

Question 11

Which of the following statements about ribosomes is correct?

Accepted Answer

Ribosomes can be free in the cytosol or bound to the rough ER, and they synthesize proteins.

Question 12

Which of the following best describes the function of the nuclear pores?

Accepted Answer

They regulate the entry and exit of molecules between the nucleus and cytoplasm.

Question 13

A cell is unable to detoxify certain chemicals and cannot store calcium ions efficiently. Which organelle is most likely malfunctioning?

Accepted Answer

Smooth endoplasmic reticulum

Question 14

During phagocytosis, which sequence of organelles is involved in the digestion of an engulfed bacterium?

Accepted Answer

Plasma membrane → food vacuole → lysosome

Question 15

Which of the following is a real-world application of cell fractionation?

Accepted Answer

Isolating mitochondria from liver cells to study their function.

Question 16

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

Accepted Answer

Membrane-bound organelles

Question 17

A mutation causes a cell to lack functional lysosomes. Which of the following is a likely consequence?

Accepted Answer

The cell will accumulate undigested macromolecules and damaged organelles.

Question 18

Which of the following best explains why compartmentalization by organelles is important in eukaryotic cells?

Accepted Answer

It allows incompatible chemical reactions to occur simultaneously in different parts of the cell.

Question 19

Which of the following statements about the Golgi apparatus is correct?

Accepted Answer

It consists of flattened sacs called cisternae and modifies, sorts, and packages proteins.

Question 20

A protist living in a freshwater environment uses a contractile vacuole. What is the main function of this organelle?

Accepted Answer

To expel excess water from the cell.

Cellular Organization: Structure and Function in General Biology

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