Microbial Physiology MCQs with Answers

adminJune 13, 2024Last Updated: October 15, 2024

0 31 2 minutes read

Welcome to the Microbial Physiology MCQs with Answers. In this post, we have shared Microbial Physiology Online Test for different competitive exams. Find practice Microbial Physiology Practice Questions with answers in Biology Tests exams here. Each question offers a chance to enhance your knowledge regarding Microbial Physiology .

Microbial physiology pertains to that subsection of microbiology discussing the physical, biochemical, and metabolic functions occurring in microorganisms. In all matters relating to growth pattern, metabolism, uptake of nutrients, and interactions with the environment, microbial physiology may give some insights into the fundamental bases responsible for life in microbes.

The core aspects of microbial physiology include microbial metabolism, cellular respiration, and nutrition uptake. The scientists elaborate on the ways in which microorganisms absorb various substrates; the means by which they produce energy, synthesize essential cell components, and how they survive in a specific environment, from extreme habitats to human hosts.

Microbial physiology can be studied with advanced techniques including spectroscopy, chromatography, and molecular assays. These allow scientists to understand enzyme activity and regulation of metabolic pathways and gene expression. For example, studies concerning microbial metabolism help understand how microbes may be involved in biogeochemical cycles, like carbon or nitrogen cycles that are vital to the health of any ecosystem.

Microbial physiology is very important in several applied fields. In biotechnology, it informs the development of the microbial strains for a range of industrial applications like bioremediation and fermentation. In medicine, it helps understand the behavior of pathogens, hence better strategies for combating infections and developing the antibiotics.

Microbial Physiology Online Quiz

By presenting 3 options to choose from, Microbial Physiology Quiz which cover a wide range of topics and levels of difficulty, making them adaptable to various learning objectives and preferences. You will have to read all the given answers of Microbial Physiology Questions and Answers and click over the correct answer.

Test Name: Microbial Physiology MCQ Quiz Practice
Type: Quiz Test
Total Questions: 40
Total Marks: 40
Time: 40 minutes

Note: Answer of the questions will change randomly each time you start the test. Practice each quiz test at least 3 times if you want to secure High Marks. Once you are finished, click the View Results button. If any answer looks wrong to you in Quizzes. simply click on question and comment below that question. so that we can update the answer in the quiz section.

Microbial Physiology

Please fill out the form before starting Quiz.

1 / 40

The process by which bacteria take up DNA from their environment is called ____.

Conjugation

Transduction

Transformation

2 / 40

The bacterial structure that allows some bacteria to adhere to surfaces is ____.

Pili

Capsule

Flagellum

3 / 40

Bacteria that can live and grow in the presence or absence of oxygen are called ____.

Facultative anaerobes

Aerotolerant anaerobes

Obligate anaerobes

4 / 40

Chemolithotrophs obtain energy from ____.

Light

Inorganic compounds

Organic compounds

5 / 40

The bacterial cell membrane is selectively permeable due to the presence of ____.

Phospholipid bilayer

Cell wall

Sterols

6 / 40

The process by which bacteria generate ATP using energy derived from light is called ____.

Oxidative phosphorylation

Photophosphorylation

Glycolysis

7 / 40

Bacteria that grow optimally at temperatures above 80°C are called ____.

Psychrophiles

Mesophiles

Thermophiles

8 / 40

The process by which bacteria reproduce asexually is called ____.

Transformation

Conjugation

Binary fission

9 / 40

The smallest and simplest form of life is ____.

Bacteria

Virus

Viroid

10 / 40

Which of the following is NOT a method of microbial locomotion?

Endocytosis

Pili

Flagella

11 / 40

The process by which bacteria form a protective barrier to survive adverse conditions is called ____.

Transformation

Conjugation

Sporulation

12 / 40

Bacterial flagella are composed of ____.

Peptidoglycan

Flagellin

Lipopolysaccharides

13 / 40

The process of converting atmospheric nitrogen into a usable form is known as ____.

Nitrogen fixation

Nitrification

Denitrification

14 / 40

Bacteria that require high concentrations of salt for growth are called ____.

Osmophiles

Halophiles

Xerophiles

15 / 40

The enzyme responsible for bacterial DNA replication is ____.

DNA polymerase

RNA polymerase

Ligase

16 / 40

Bacteria that live in extreme environments such as hot springs are called ____.

Psychrophiles

Mesophiles

Extremophiles

17 / 40

The process by which bacteria break down organic compounds to obtain energy is ____.

Photosynthesis

Respiration

Fermentation

18 / 40

The process of transferring genetic material from one bacterium to another through direct cell-to-cell contact is called ____.

Transduction

Conjugation

Transformation

19 / 40

The primary function of bacterial pili is ____.

Protection

Adherence to surfaces

Motility

20 / 40

Bacteria that obtain energy from organic compounds and carbon from inorganic sources are called ____.

Chemoheterotrophs

Photoautotrophs

Chemoautotrophs

21 / 40

Bacteria that grow optimally at pH below 5.5 are called ____.

Acidophiles

Alkaliphiles

Neutrophiles

22 / 40

Which bacterial structure provides resistance to desiccation and chemicals?

Flagellum

Endospore

Capsule

23 / 40

Bacteria that can grow in the presence or absence of oxygen but prefer oxygen if available are called ____.

Obligate anaerobes

Facultative anaerobes

Aerotolerant anaerobes

24 / 40

The process by which bacteria regulate the movement of water across their cell membrane is ____.

Active transport

Osmosis

Osmoregulation

25 / 40

Bacteria that require oxygen for growth but at concentrations less than atmospheric levels are called ____.

Microaerophiles

Obligate aerobes

Facultative anaerobes

26 / 40

Bacterial ribosomes are composed of ____.

60S

70S

80S

27 / 40

During which phase of bacterial growth does the rate of growth equal the rate of death?

Lag phase

Log phase

Stationary phase

28 / 40

The process by which bacteria move towards or away from certain stimuli is called ____.

Phototaxis

Chemotaxis

Magnetotaxis

29 / 40

The bacterial cell wall is mainly composed of ____.

Peptidoglycan

Cellulose

Chitin

30 / 40

The bacterial cell membrane is primarily composed of ____.

Phospholipids

Chitin

Peptidoglycan

31 / 40

The Gram-negative outer membrane is mainly composed of ____.

Teichoic acids

Lipopolysaccharides

Peptidoglycan

32 / 40

Which bacterial structure is involved in motility?

Endospore

Capsule

Flagellum

33 / 40

The enzyme that breaks down hydrogen peroxide into water and oxygen in bacteria is ____.

Peroxidase

Catalase

Superoxide dismutase

34 / 40

Bacterial resistance to antibiotics can occur due to ____.

Biofilm formation

Beta-lactamases

Efflux pumps

35 / 40

The enzyme responsible for fixing atmospheric nitrogen into ammonia is ____.

Nitrate reductase

Nitrogenase

Nitrite reductase

36 / 40

The movement of substances across the bacterial cell membrane from high to low concentration without the use of energy is ____.

Facilitated diffusion

Active transport

Passive diffusion

37 / 40

Cyanobacteria are unique among bacteria because they ____.

Perform oxygenic photosynthesis

Are obligate anaerobes

Can fix nitrogen

38 / 40

The term "generation time" refers to ____.

Time required for sporulation

Time required for bacterial population to double

Time required for conjugation

39 / 40

The molecule used by bacteria to store excess carbon and energy is ____.

Polyhydroxybutyrate

Glycogen

Starch

40 / 40

The enzyme responsible for transcribing RNA from DNA in bacteria is ____.

RNA polymerase

DNA ligase

Helicase

Download Certificate of Quiz Microbial Physiology

On the end of Quiz, you can download the certificate of the quiz if you got more than 70% marks. Add a certificate to your job application or social profile (like LinkedIn) and get more job offers.

If you are interested to enhance your knowledge regarding English, Physics, Chemistry, and Computer please click on the link of each category, you will be redirected to dedicated website for each category.

adminJune 13, 2024Last Updated: October 15, 2024

0 31 2 minutes read