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Spontaneous Generation and Refutation by Spallanzani

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Spontaneous Generation and Refutation by Spallanzani

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Questions and Answers

What was the curious pattern of growth Alexander Fleming observed on the contaminated culture plates?

A circular mold growth with a halo of inhibited bacterial growth

A clear area with no bacterial growth surrounding the mold (correct)

A zig-zag pattern of mold growth through the middle of the bacterial culture

A mold growth covering the entire surface of the culture plates

Which type of bacteria does penicillin work best on?

Archaea

Gram-positive bacteria (correct)

Gram-negative bacteria

Bacteria that produce spores

What effect does penicillin have on bacterial cells?

It makes them leaky and fragile (correct)

It causes them to produce more peptidoglycan

It enhances their growth rate

It makes them shrink in size

Why did Fleming almost toss out the contaminated culture plates?

He thought the mold had no useful properties (C) Signup and view all the answers

What did Fleming name the active inhibitor produced by Penicillium chrysogenum?

Penicillin (B) Signup and view all the answers

When was the enormous usefulness of penicillin first realized?

In the 1940s when it was tested clinically and mass produced (C) Signup and view all the answers

What is the scientific name for the mold Fleming discovered?

Penicillium chrysogenum (B) Signup and view all the answers

What is the main reason why penicillin is considered an antibiotic?

It is produced by a fungus (D) Signup and view all the answers

How did Fleming describe the initial growth pattern he observed around the mold?

A zone where bacterial growth had been inhibited (B) Signup and view all the answers

Whose work led to the discovery of penicillin?

Alexander Fleming (A) Signup and view all the answers