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Quiz on Bacteria

Quiz on Bacteria

Bacteria are prokaryotes, which consist of a single cell with a simple internal structure. Credit: nobeastsofierce/Shutterstock.com. Bacteria are microscopic single-celled organisms that thrive in diverse environments. They can live within soil, in the ocean and inside the human gut.

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Quiz Questions And Answers

An organism containing a gene which doesn’t belongs to it and is derived from somewhere else then the organism is said to be:

transformed
transgenic
mutant

E.coli is a gram negative bacterium. Is the given statement true or false?

True
False

If a host other than E.coli is to be used, what property of DNA to be inserted is disadvantageous?

Circular DNA
Linear DNA
Replicating DNA

If plasmids direct their own transfer from one bacterium cell to another, then they are called as:

self-transmissible
auto-transmissible
autonomously replicating

If a plasmid can’t be transferred from one cell to another, then it is called as

non-mobilizable
non-transmissible
immobilized

Which of the bacteria are used as hosts?

Gram-positive
Gram-negative
Both can be used but gram positive is preferred

Basically, there are how many methods for introduction of DNA into the bacterial cells?

3
2
1

Gram-positive Bacillus, Streptococcus and Streptomyces include species that don’t exhibit natural competence. Is the given statement true or false?

True
False

Competence is determined by the excretion into growth medium of _______, _________ proteins called as competence proteins.

cellular, high molecular weight
cellular, low molecular weight
extracellular, low molecular weight

Natural transformation can be relieved by the use of protoplasts, in the presence of osmotic buffer and polyethylene glycol. What are protoplasts?

Protoplasts are the cells from which cell membrane has been removed
Protoplasts are the cells from which cell wall has been removed
Protoplasts are the cells from which vacuole has been removed

The transfer of plasmid from one bacterial cell to another when cargo and conjugal plasmids are used, it is usually is carried out by _____ mating.

diparental
uniparental
triparental

Which of the following bacteria lack a cell wall and are therefore resistant to penicillin?

Cyanobacteria
Mycoplasmas
Bdellovibrios

A cluster of polar flagella is called

lophotrichous
amphitrichous
monotrichous

Flagella move the cell by

many flagella beating in a synchronous, whip-like motion
an individual flagellum beating in a whip-like motion
spinning like a propeller

The protein from which hook and filaments of flagella are composed of, is

keratin
flagellin
gelatin
ANSWERS

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