Question 1

Who accidentally identified the antimicrobial action of penicillin?

Accepted Answer

Alexander Fleming

Answer

Robert Koch

Answer

Richard Petri

Answer

Louis Pasteur

Question 2

The outermost layer of a bacterial cell is called the _________________________

Accepted Answer

capsule

Answer

cell membrane

Answer

capsid

Answer

cell wall

Question 3

Gram Positive bacteria will stain:

Accepted Answer

purple, because of the thick cell wall

Answer

brown, because of the thick cell wall

Answer

pink, because of the thin cell wall

Answer

red, because of the thick cell wall

Question 4

Bacteria can be which of the following shapes?

Accepted Answer

Bacillus, Spirilia, Coccus

Answer

Long, rod, slender

Answer

Bacillus, Spirilia, Conpus

Answer

round, circular, coccus

Question 5

Members of ____________ are adpated to live in harsh environments.

Accepted Answer

Archaebacteria

Answer

Cyanophyta

Answer

Prokaryotes

Answer

Eubacteria

Question 6

Which of the following is an asexual form of reproduction in bacteria?

Accepted Answer

binary fission

Answer

transduction

Answer

conjugation

Answer

transformation

Question 7

Which of the following is NOT part of a bacteria cell?

Accepted Answer

nucleus

Answer

plasmids

Answer

ribosomes

Answer

cytoplasm

Question 8

Bacteria play a vital role in Earth's ecosystems by

Accepted Answer

decomposing dead organisms

Answer

concentrating valuable minerals

Answer

producing acetone

Answer

using oxygen

Question 9

Bacteria is used in making which of the following foods?

Accepted Answer

all of the above

Answer

cheese

Answer

soy sauce

Answer

yoghurt

Question 10

Which group(s) of microorganisms is (are) thought to be the oldest living organisms?

Accepted Answer

anaerobic bacteria

Answer

half anaerobic bacteria

Answer

aerobic bacteria

Answer

obligate aerobic bacteria

Question 11

Penicillin is used as an antibiotic since it

Accepted Answer

breaks down the cell wall

Answer

all the above

Answer

destroys the capsule

Answer

lysis the cell membrane

Question 12

_________________ is another term used to describe sexual reproduction in bacteria

Accepted Answer

Conjugation

Answer

transformation

Answer

transduction

Answer

binary fission

Question 13

An endospore resists

Accepted Answer

all of the above

Answer

temperature extremes

Answer

harsh chemicals

Answer

drying out

Question 14

_______________ produces a toxin that can be fatal.

Accepted Answer

Clostridium botulinum

Answer

Both

Answer

None

Answer

Clostridium tetani

Question 15

few examples of antibiotics

Accepted Answer

all of the above

Answer

penicillin

Answer

streptomycin

Answer

erythromycin

Question 16

Which of the following live in the intestines of cows and are anearobic

Accepted Answer

methanogens

Answer

technophils

Answer

halophiles

Answer

thermoacidophile

Question 17

A _____ is a part of the virus

Accepted Answer

all of the above

Answer

capsid

Answer

DNA or RNA

Answer

nucleic acid

Question 18

What is the major difference between eukaryotic and prokaryotic cells

Accepted Answer

prokaryotic cells don't have a nucleus, but eukaryotic cells do

Answer

prokaryotic cells cannot obtain energy from their environment

Answer

prokaryotic cells don't have DNA, but eukaryotic cells do

Answer

prokaryotic cells are bigger than eukaryotic cells

Question 19

All of the following are true for viruses EXCEPT:

Accepted Answer

viruses may not replicate without a host cell

Answer

the envelope of the virus enters the host cell by endocytosis

Answer

viruses may replicate in a bacterial or eukaryotic cell

Answer

genetic material may be DNA or RNA

Question 20

Endospores are destroyed by

Accepted Answer

sterilization

Answer

high pressure

Answer

high temperature

Answer

pasteurization

Question 21

The structure that helps the bacteria to move is

Accepted Answer

flagella

Answer

pilli

Answer

endospore

Answer

capsule

Question 22

the genetic materia of a bacteria is found in

Accepted Answer

the nucleiod region

Answer

organelle

Answer

nucleus

Answer

cell membrane

Question 23

Bacteria that are obligate anearobes release energy from food by

Accepted Answer

none of the above

Answer

using oxygen

Answer

cellular respiration

Answer

using nitrogen

Question 24

Botulism is caused by endospores of C. botulinum that have

Accepted Answer

germinated

Answer

reproduced

Answer

been killed

Answer

produced toxins

Question 25

_________ is a prefix that describes the grape like pattern growth of bacteria

Accepted Answer

Staph

Answer

Cocci

Answer

Diplococci

Answer

Strep

Question 26

Nitrogen is important because all organisms need it to make

Accepted Answer

all of the above

Answer

DNA

Answer

ATP

Answer

protein

Question 27

Bacteria return nutrients to the environment by breaking down

Accepted Answer

dead organic matter

Answer

nitrogen in legumes

Answer

enzymes and sugars

Answer

inorganic matter

Question 28

Layers that surround capsids of some viruses are called

Accepted Answer

envelope

Answer

capsule

Answer

cell wall

Question 29

As an endospore a bacteria

Accepted Answer

is protected

Answer

causes diseases

Answer

dries out

Answer

produces toxins

Question 30

All of the following are true for viruses EXCEPT:

Accepted Answer

Viruses may replicate without a host cell

Answer

genetic material may be RNA or DNA

Answer

The envelope of the virus enters the host by endocytosis

Answer

viruses may replicate in a bacterial or eukaryotic cell

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