FREE! Click here to Join FunTrivia. Thousands of games, quizzes, and lots more!

Quiz about The Wonderful World of Microbiology

The Wonderful World of Microbiology Quiz

This quiz tests your knowledge of the classification, structure and metabolism of prokaryotic cells (bacteria), as well as some common lab procedures used in microbiology. It contains basic questions from a college-level Microbiology course.

A multiple-choice quiz by violin34. Estimated time: 4 mins.

Author
violin34

Time
4 mins

Type
Multiple Choice

Quiz #
264,960

Updated
Dec 03 21

# Qns
10

Difficulty
Tough

Avg Score
6 / 10

Plays
5561

Awards
Top 5% quiz!

Last 3 plays: Guest 89 (8/10), Mojsilovic123 (8/10), Guest 155 (1/10).

One at a Time - Single Page - Timed Game

Question 1 of 10

1. The Gram stain is used to classify cells based on differences in their ________. Hint

cell wall

nucleus

cell membrane

cytoplasm

NEXT>

Question 2 of 10

2. A small ring of DNA independent from the bacterium's main genome that can be taken in and expressed by bacteria is called a(n) __________. Hint

plasmid

RNA

mini-DNA

ribosome

NEXT>

Question 3 of 10

3. LPS is an endotoxin that is found on the outer membrane of Gram negative bacteria. LPS stands for _________. Hint

leading poison strand

lagging poison strand

lactopeptosucrose

lipopolysaccharide

NEXT>

Question 4 of 10

4. Okazaki fragments are associated with which essential process? Hint

cellular respiration

amino acid synthesis

protein synthesis

DNA replication

NEXT>

Question 5 of 10

5. One genus of bacteria that can be found in the bottom, black layer of a Winogradsky column is _____________. Hint

Cyanobacteria

Desulfovibrio

Beggiatoa

Rhodobium

NEXT>

Question 6 of 10

6. Which of these is used as a mordant in the Gram stain? Hint

alcohol

safranin

crystal violet

iodine

NEXT>

Question 7 of 10

7. Which of these is not in the domain Bacteria? Hint

Proteobacteria

Cyanobacteria

Methanobacterium

Bacteroides

NEXT>

Question 8 of 10

8. The genus Mycoplasma is resistant to the effects of ____________. Hint

triclosan

sulfanomides

streptomycin

penicillin

NEXT>

Question 9 of 10

9. Which type of plasmid, when taken up by a bacteria, confers the ability to create a sex pilus? Hint

R-plasmid

S-plasmid

Col-plasmid

F-plasmid

NEXT>

Question 10 of 10

10. Which is least likely to kill bacteria? Hint

extreme cold

extreme acidity

extreme heat

extreme alkalinity

(Optional) Create a Free FunTrivia ID to save the points you are about to earn:

Select a User ID:

Choose a Password:

Your Email:

Most Recent Scores

Dec 17 2024 : Guest 89: 8/10
Dec 15 2024 : Mojsilovic123: 8/10
Dec 14 2024 : Guest 155: 1/10
Dec 11 2024 : Guest 93: 3/10
Dec 06 2024 : Guest 82: 0/10
Dec 03 2024 : Guest 97: 6/10
Nov 25 2024 : Guest 47: 9/10
Nov 13 2024 : Guest 35: 4/10
Nov 11 2024 : Guest 204: 5/10

Score Distribution

Quiz Answer Key and Fun Facts

1. The Gram stain is used to classify cells based on differences in their ________.

Answer: cell wall

Gram positive bacteria have a thick peptidoglycan cell wall, and Gram negative bacteria have a thin peptidoglycan cell wall with an outer membrane. Gram negative bacteria are also more likely to be pathogenic than Gram positive bacteria.

2. A small ring of DNA independent from the bacterium's main genome that can be taken in and expressed by bacteria is called a(n) __________.

Answer: plasmid

Plasmids are very useful in genetic engineering, enabling us to insert human genes into bacteria to produce mass quantities of human proteins.

3. LPS is an endotoxin that is found on the outer membrane of Gram negative bacteria. LPS stands for _________.

Answer: lipopolysaccharide

LPS induces a fever response in the human body. Gram negative bacteria are often heat-sensitive, so the fever will help to eliminate the infection.

4. Okazaki fragments are associated with which essential process?

Answer: DNA replication

Okazaki fragments are the small segments of DNA that are formed on the lagging strand during DNA replication.

5. One genus of bacteria that can be found in the bottom, black layer of a Winogradsky column is _____________.

Answer: Desulfovibrio

The Winogradsky column is a device that models the interactions of bacteria in the environment. Desulfovibrio are sulfate-reducing anaerobic bacteria that live at the bottom of the column.

6. Which of these is used as a mordant in the Gram stain?

Answer: iodine

The mordant helps in the uptake of dyes into the cell. Crystal violet is the primary stain, alcohol is the decolorizer, and safranin is the counterstain.

Thanks lateonenight: Iodine is technically not a mordant, but a trapping agent. To be correctly classified as a mordant, a compound must be a metal, which iodine is not. However, most Gram stain procedures refer to iodine as a mordant. For more information on the difference between trapping stains and mordants go to http://stainsfile.info/StainsFile/theory/trapping.htm

7. Which of these is not in the domain Bacteria?

Answer: Methanobacterium

Methanobacterium belongs to the domain Archaea, which differs significantly from Bacteria in chemical structure and metabolism. The term "bacteria" is commonly used to refer to all prokaryotes, or single-celled organisms lacking a nucleus.

8. The genus Mycoplasma is resistant to the effects of ____________.

Answer: penicillin

Mycoplasma has no cell wall, and since penicillins disrupt cell wall synthesis, the antibiotic has no effect.

9. Which type of plasmid, when taken up by a bacteria, confers the ability to create a sex pilus?

Answer: F-plasmid

F-plasmid stands for fertility plasmid, although my biology class used a different mnemonic. :)

10. Which is least likely to kill bacteria?

Answer: extreme cold

Extreme cold, while inhibiting the growth of most bacteria, does not usually kill them. And although heat and high and low pH will kill most known species of bacteria, certain species of Archaea can live in these extreme environments.

Source: Author violin34

This quiz was reviewed by FunTrivia editor crisw before going online.
Any errors found in FunTrivia content are routinely corrected through our feedback system.