Q: Which equation correctly represents the relationship between surface area and volume for a spherical cell as its radius increases?

$$\text{Surface Area} = 4 \pi r^2$ and \text{Volume} = \frac{4}{3} \pi r^3$

Question 1

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

Accepted Answer

Small cells have a higher surface area to volume ratio, facilitating 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 type of microscopy should they use?

Accepted Answer

Transmission electron microscopy (TEM)

Question 3

Which organelle is responsible for modifying, sorting, and packaging proteins for secretion or delivery to other organelles?

Accepted Answer

Golgi apparatus

Question 4

According to the endosymbiotic theory, which of the following is evidence that mitochondria and chloroplasts originated from prokaryotic cells?

Accepted Answer

They contain circular DNA and ribosomes similar to those found in bacteria.

Question 5

A mutation causes a cell to lack functional dynein motor proteins. Which cellular process would be most directly affected?

Accepted Answer

Movement of cilia and flagella

Question 6

Which equation correctly represents the relationship between surface area and volume for a spherical cell as its radius increases?

Accepted Answer

$$	ext{Surface Area} = 4 \pi r^2$ and 	ext{Volume} = \frac{4}{3} \pi r^3$

Question 7

Which of the following organelles is found in plant cells but not in animal cells?

Accepted Answer

Central vacuole

Question 8

During cell fractionation, which organelle would be found in the pellet after centrifuging at the highest speed?

Accepted Answer

Ribosomes

Question 9

Which of the following best describes the function of the rough endoplasmic reticulum (RER)?

Accepted Answer

Modification and transport of proteins destined for membranes or secretion

Question 10

A cell is observed to have a cell wall made of chitin. Which type of organism is this cell most likely from?

Accepted Answer

Fungus

Question 11

Which cytoskeletal element is primarily responsible for maintaining cell shape and resisting mechanical stress?

Accepted Answer

Intermediate filaments

Question 12

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

Accepted Answer

Mitochondrion

Question 13

Which process occurs in the mitochondria and can be summarized by the following equation?
$$	ext{C}_6	ext{H}_{12}	ext{O}_6 + 6	ext{O}_2 ightarrow 6	ext{CO}_2 + 6	ext{H}_2	ext{O} + 	ext{ATP}$$

Accepted Answer

Aerobic respiration

Question 14

Which structure in animal cells serves as the microtubule-organizing center and is important for cell division?

Accepted Answer

Centrosome

Question 15

A cell is observed to have a large number of free ribosomes. What is the most likely function of this cell?

Accepted Answer

Production of cytosolic proteins

Question 16

Which of the following statements about prokaryotic cells is TRUE?

Accepted Answer

Their DNA is located in a nucleoid region.

Question 17

Which of the following best describes the role of integrins in animal cells?

Accepted Answer

They connect the extracellular matrix to the cytoskeleton and transmit signals.

Question 18

Which organelle is most directly involved in the detoxification of alcohol in liver cells?

Accepted Answer

Smooth endoplasmic reticulum

Question 19

Which of the following is a function of the plant cell central vacuole?

Accepted Answer

Storage of water, nutrients, and waste products

Question 20

Which cytoskeletal element is composed of actin monomers and is involved in muscle contraction?

Accepted Answer

Microfilaments

Chapter 6: A Tour of the Cell – General Biology Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard