40 Best Microbiology Questions and Answers (Q&A) - ProProfs Discuss

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What are the factors that affect the gram staining procedure?

John Smith
Answered: Jan 11, 2025

The main factor that influences the result of a Gram stain (whether an organism is classified as Gram positive or Gram negative) is the structure of their cell wall.
The Gram positi...Read More

3 Answers

3474 views

Who is considered the father of virology?

Caitlin_mumaw
Answered: Jan 11, 2025

Martineaus Beijerink is considered the father of virology.

1 Answer

1925 views

What is the microorganisms?

Robert Hazlewood, Senior Executive
Answered: Jan 31, 2019

A microorganism is an organism that is microscopic; this means such an organism cannot be seen with the naked eye. Microorganism includes bacteria, fungi, viruses, protists, and...Read More

5 Answers

1282 views

What cannot be true regarding viruses?

Anika Nicole, Wordsmith
Answered: Jul 20, 2018

All have a protein capsid and envelope. Not all viruses have a protein capsid and envelope. Viruses are basically microscopic parasites which don't have the capacity to thrive and reprod...Read More

4 Answers

1095 views

What do microorganisms do?

Urhievwegba
Answered: May 18, 2020

They produce antibiotics They are used in the production of many types of food and beverages They decompose dead...Read More

2 Answers

907 views

What is a PYR test?

Barry Mclean, Sales Manager
Answered: Apr 10, 2019

The correct answer to this question is PYR Positive. PYR stands for pyrrolidonly Aminopeptidase. This test is used to detect the activity of pyrolidonly arylamidase activity. This activity...Read More

3 Answers

842 views

What kind of bond is at the arrow in Figure 2.4?

Mceiswich
Answered: Jan 11, 2025

Peptide bond

1 Answer

667 views

How is the ability of a virus to infect an organism regulated?

John Adney
Answered: Apr 09, 2017

Why is it all the above and not just the host?

2 Answers

651 views

What are Capsids?

MINANITheobald
Answered: May 31, 2017

The capsid is composed of capsomere is the repeating unit.

2 Answers

607 views

What are used on fastidious organisms that require defined known quantities of specific nutrients?

John Smith
Answered: Jan 11, 2025

Defined media

2 Answers

581 views

What are the factors that shift the phase to the decline phase?

Mokrysalimi
Answered: Jan 11, 2025

Condition in the medium become less and cell lose their ability to divide

Condition in the medium become less because there are too many competition to get the limited nutrient and on top...Read More

1 Answer

572 views

What is population growth, usually analyzed in a closed system called?

John Smith
Answered: Jan 11, 2025

Batch culture

1 Answer

563 views

What kind of organism does the term facultative anaerobe refer to?

Fabiounsoed
Answered: Jan 11, 2025

Uses oxygen when present or grows without oxygen when oxygen is absent

1 Answer

553 views

What does the final outcome of most host-parasite relationships depend on?

Andreazza
Answered: Jan 11, 2025

All of the choices

1 Answer

541 views

What does Kochs Postulate say?

John Smith
Answered: Jan 11, 2025

The pathogen must be isolated from the diseased host. The same disease must be produced when microbes from pure culture are inoculated into healthy susceptible...Read More

1 Answer

499 views

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