Question 1

Which of the following best describes the experiment by Louis Pasteur that disproved spontaneous generation?

Accepted Answer

He used swan-necked flasks that allowed air in but prevented dust and microbes from entering, resulting in no microbial growth unless the flask was tilted.

Question 2

Which of the following is a unique structural feature of acid-fast cell walls?

Accepted Answer

A waxy layer rich in mycolic acids

Question 3

A patient is diagnosed with tuberculosis. Which staining procedure would be most appropriate to identify the causative agent in a sputum sample?

Accepted Answer

Acid-fast stain

Question 4

Which of the following statements about the electron transport chain (ETC) in aerobic respiration is correct?

Accepted Answer

The ETC generates a proton gradient across a membrane, which is used to produce ATP via oxidative phosphorylation.

Question 5

Which of the following best explains why immersion oil is used with the 100x objective lens in light microscopy?

Accepted Answer

It reduces light refraction, increasing resolution by matching the refractive index of glass.

Question 6

A bacterial cell is placed in a hypertonic solution. Which process will occur, and what is the likely outcome for the cell?

Accepted Answer

Osmosis will cause water to leave the cell, resulting in plasmolysis.

Question 7

Which of the following is a correct comparison between prokaryotic and eukaryotic cells?

Accepted Answer

Eukaryotic cells have a nucleus; prokaryotic cells have a nucleoid region.

Question 8

Which of the following best describes the function of bacterial flagella?

Accepted Answer

Motility through rotation, enabling chemotaxis

Question 9

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

Accepted Answer

They possess an outer membrane containing lipopolysaccharide (LPS).

Question 10

Which of the following best describes the process of chemiosmosis?

Accepted Answer

The use of a proton gradient to drive ATP synthesis via ATP synthase

Question 11

A scientist is using a phase-contrast microscope to observe living cells. What is the main advantage of this technique?

Accepted Answer

It allows visualization of internal structures in living cells without staining.

Question 12

Which of the following is a correct statement about the scientific method?

Accepted Answer

An experiment is designed to test a hypothesis.

Question 13

Which of the following best describes the role of ATP in metabolism?

Accepted Answer

ATP stores energy in its phosphate bonds and releases it when hydrolyzed.

Question 14

Which of the following is a product of glycolysis?

Accepted Answer

$$2 \ 	ext{Pyruvate}$$

Question 15

Which of the following best explains why bacterial cells use active transport to obtain certain nutrients?

Accepted Answer

Active transport moves molecules against their concentration gradient using energy, allowing uptake of scarce nutrients.

Question 16

Which of the following is a correct description of facilitated diffusion?

Accepted Answer

It uses membrane proteins to move molecules down their concentration gradient without energy input.

Question 17

Which of the following is a function of the bacterial glycocalyx?

Accepted Answer

Protection from desiccation and phagocytosis

Question 18

Which of the following best describes the endosymbiotic theory?

Accepted Answer

Mitochondria and chloroplasts originated as free-living prokaryotes that were engulfed by ancestral eukaryotic cells.

Question 19

Which of the following is a correct statement about fermentation?

Accepted Answer

Fermentation regenerates NAD$$^+ by $$transferring electrons to organic molecules, allowing glycolysis to continue.

Question 20

A microbiologist is classifying a newly discovered bacterium. Which of the following would be the most reliable method for determining its phylogenetic relationship to known species?

Accepted Answer

Analyzing its nucleic acid sequence

General Microbiology: Unit 1 Study Guide and Learning Objectives

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드