Question 1

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

Accepted Answer

Smaller cells have a higher surface area-to-volume ratio, which facilitates efficient exchange of materials with their environment. $$	ext{Surface Area} : 	ext{Volume}$$

Question 2

A scientist wants to observe the detailed internal structure of mitochondria. Which microscope should they use?

Accepted Answer

Transmission Electron Microscope (TEM)

Question 3

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

Accepted Answer

Eukaryotic cells have their DNA enclosed in a nucleus, while prokaryotic cells have their DNA in a nucleoid region.

Question 4

Which organelle is primarily responsible for energy production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 5

A patient is infected with a bacterium that is resistant to multiple antibiotics. Which of the following best explains how this resistance can arise?

Accepted Answer

The bacterium acquires genetic mutations that alter antibiotic target sites, allowing survival in the presence of antibiotics.

Question 6

Which of the following statements about Gram-positive and Gram-negative bacteria is correct?

Accepted Answer

Gram-negative bacteria have a thinner peptidoglycan layer and an outer membrane, making them more resistant to certain antibiotics.

Question 7

Which process is used to separate cellular components based on size and density?

Accepted Answer

Centrifugation

Question 8

Which of the following is a real-world application of bacteria in environmental science?

Accepted Answer

Bioremediation, where bacteria break down toxic contaminants into harmless products.

Question 9

Which organelle is responsible for packaging and modifying proteins for secretion in eukaryotic cells?

Accepted Answer

Golgi apparatus

Question 10

A protist causes malaria in humans. What is the genus of this protist?

Accepted Answer

Plasmodium

Question 11

Which of the following best describes the function of lysosomes in animal cells?

Accepted Answer

Lysosomes break down waste materials and cellular debris using hydrolytic enzymes.

Question 12

Which of the following equations correctly represents the calculation of the surface area of a cube-shaped cell with side length $$l$$?

Accepted Answer

$$	ext{Surface Area} = 6l^2$

Question 13

Which of the following is a function of the microbiome in humans?

Accepted Answer

The microbiome helps digest food and provides nutrients to the host.

Question 14

Which of the following is true about the structure and function of the plasma membrane?

Accepted Answer

The plasma membrane regulates the movement of substances into and out of the cell.

Question 15

Which of the following statements about fungi is correct?

Accepted Answer

Fungi can be used in food production, such as bread and beer making.

Question 16

Which of the following best describes the role of nitrogen-fixing bacteria in agriculture?

Accepted Answer

They convert nitrogen gas ($$N_2) $$from the atmosphere into organic nitrogen compounds usable by plants.

Question 17

Which of the following is a characteristic unique to Archaea compared to Bacteria?

Accepted Answer

Archaea have unique membrane lipids not found in Bacteria.

Question 18

Which of the following is a real-life example of a disease caused by a fungus?

Accepted Answer

Ringworm (tinea corporis)

Question 19

Which organelle is most analogous to a 'post office' in a cell, sorting and shipping proteins to their destinations?

Accepted Answer

Golgi apparatus

Question 20

A scientist is studying a protist that can only digest cellulose with the help of symbiotic bacteria in its gut. What is the biological significance of this relationship?

Accepted Answer

It is an example of mutualism, where both the protist and bacteria benefit.

Chapter 6 - Part 1 Study Notes : Cells and Organelles: Structure, Function, and Study Techniques

Guida di studio - Domande di pratica

Study guide - Flashcard