Question 1

Which of the following statements best describes the function of mitochondria in eukaryotic cells?

Accepted Answer

Mitochondria produce ATP, the cell's main energy currency.

Question 2

A patient presents with symptoms of Chagas disease. Which microbe is most likely responsible, and how is it typically diagnosed?

Accepted Answer

Trypanosoma cruzi; diagnosed by shape with simple staining and brightfield microscopy of blood.

Question 3

Which of the following cell wall components is unique to Gram-negative bacteria?

Accepted Answer

Lipopolysaccharide (LPS)

Question 4

Which equation best represents the process by which mitochondria generate ATP?

Accepted Answer

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

Question 5

Which of the following best explains why animal cells do not have a cell wall?

Accepted Answer

Animal cells have a plasma membrane with sterols for fluidity and rigidity.

Question 6

A bacterium is found to have a thick peptidoglycan layer and teichoic acids. Which type of cell wall does it most likely possess?

Accepted Answer

Gram-positive

Question 7

Which of the following is a correct description of the symbiotic theory for the origin of eukaryotic organelles?

Accepted Answer

Mitochondria and chloroplasts originated from bacteria through phagocytosis and symbiosis.

Question 8

Which of the following structures is found only in eukaryotic cells and is responsible for the synthesis of ribosomal RNA?

Accepted Answer

Nucleolus

Question 9

A scientist observes a microbe with a flexible outer protein layer but no cell wall. Which type of microbe is most likely being observed?

Accepted Answer

Protozoa

Question 10

Which of the following best describes the function of the Golgi apparatus in eukaryotic cells?

Accepted Answer

It processes and ships proteins to their destinations.

Question 11

Which bacterial cell shape is associated with the causative agent of syphilis?

Accepted Answer

Spirochete

Question 12

Which of the following is a function of the smooth endoplasmic reticulum in eukaryotic cells?

Accepted Answer

Production of fats and steroids

Question 13

A bacterium is resistant to penicillin and lysozyme. Which cell wall type is most likely present?

Accepted Answer

Acid-fast

Question 14

Which of the following best explains the role of peptidoglycan in bacterial cells?

Accepted Answer

It gives shape and prevents lysis of the cell.

Question 15

Which of the following equations represents the process of photosynthesis in chloroplasts?

Accepted Answer

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

Question 16

Which of the following is a distinguishing feature of eukaryotic flagella compared to prokaryotic flagella?

Accepted Answer

Eukaryotic flagella are composed of microtubules arranged in a ring and are covered by plasma membrane.

Question 17

Which of the following best describes the cell wall composition of fungi?

Accepted Answer

Chitin

Question 18

A patient receives an organ transplant and later develops Chagas disease. Which transmission route is most likely responsible?

Accepted Answer

Transmission through organ transplant or blood transfusion

Question 19

Which of the following best explains why Gram-negative bacteria are often more resistant to antibiotics than Gram-positive bacteria?

Accepted Answer

Gram-negative bacteria possess an outer membrane containing lipopolysaccharide (LPS) that acts as a barrier.

Microbe Anatomy: Structure and Classification of Microbial Cells

Study Guide - Practice Questions