Question 1

Which of the following best describes the main structural difference between the cell wall of Bacteria and Archaea?

Accepted Answer

Bacterial cell walls contain peptidoglycan, while Archaeal cell walls contain pseudopeptidoglycan or other polymers.

Question 2

Which of the following is a key difference between Gram-positive and Gram-negative bacteria?

Accepted Answer

Gram-positive bacteria have a thick peptidoglycan layer and lack an outer membrane, while Gram-negative bacteria have a thin peptidoglycan layer and possess an outer membrane.

Question 3

Which nutritional mode is correctly matched with its energy and carbon source?

Accepted Answer

Photoautotroph: energy from light, carbon from $$CO_2$$

Question 4

A bacterium that can survive in both oxygen-rich and oxygen-poor environments is classified as:

Accepted Answer

Facultative anaerobe

Question 5

Which structure is NOT typically found in prokaryotic cells?

Accepted Answer

Nucleus

Question 6

Which of the following is a function of bacterial plasmids?

Accepted Answer

Carrying genes for antibiotic resistance

Question 7

Which of the following structures allows bacteria to survive harsh environmental conditions by forming a resistant, dormant cell?

Accepted Answer

Endospore

Question 8

Which process involves the direct transfer of DNA from one bacterial cell to another via a pilus?

Accepted Answer

Conjugation

Question 9

Which of the following best explains why antibiotics are generally ineffective against viruses?

Accepted Answer

Viruses lack the cellular structures targeted by antibiotics, such as cell walls and ribosomes.

Question 10

Which of the following is an example of an opportunistic pathogen?

Accepted Answer

A bacterium that causes disease only when the host's immune system is compromised

Question 11

Which of the following protists is correctly matched with its group?

Accepted Answer

Euglena: Euglenids

Question 12

Which of the following statements about the evolutionary history of animal body plans is correct?

Accepted Answer

The Cambrian period saw a rapid diversification of animal body plans.

Question 13

Which of the following is a key advantage of having a body cavity (coelom) in animals?

Accepted Answer

It allows for the development of more complex organ systems.

Question 14

Which of the following is a major difference between fungi and plants?

Accepted Answer

Fungi have cell walls made of chitin, while plants have cell walls made of cellulose.

Question 15

Which fungal group is responsible for bread mold and includes species such as Rhizopus?

Accepted Answer

Zygomycota

Question 16

Which of the following best describes mutualism?

Accepted Answer

A symbiotic relationship in which both organisms benefit

Question 17

Which of the following equations correctly represents the process of photosynthesis?

Accepted Answer

$$6CO_2 + 6H_2O \rightarrow C_6H_{12}O_6$ + 6O_2$$

Question 18

Which of the following is a disadvantage of having an exoskeleton?

Accepted Answer

It limits growth and requires molting for the organism to increase in size.

Question 19

Which of the following best explains the role of antibiotics in treating bacterial infections?

Accepted Answer

Antibiotics target specific bacterial structures or processes, such as cell wall synthesis or protein synthesis.

General Biology Study Guide: Bacteria, Archaea, Protists, Fungi, and Animal Diversity

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