unit one exam

What does the science of microbiology study

Life forms too small to see with the unaided eye

Are most microorganisms harmful or harmless to people?

Most microorganisms are harmless to people

Which of the following scientists provided evidence in favor of the concept of spontaneous generation?

Needham

Which researcher ultimately gave us a method for proving that a particular microbe caused a particular disease?

Robert Koch

True

Lazzo Spallanzani was the first scientist to provide evidence disproving the spontaneous generation of microorganism

Spontaneous generation

What term describes the idea that living organisms can come form nonliving substances?

The development of techniques for sterile transfer of bacteria.

Which of the following contributed to the successful application of Koch’s postulates?

Whether or not the flasks were sealed.

Which of the following was a crucial difference between the work of John T Needham and Louis Pasteur on the question of spontaneous generation?

He developed the first microscope

What was Leeuwenhoek’s contribution to the science of microbiology?

A bacterium had been proven to cause a disease

Koch’s work involving anthrax was significant because it was the first time…

View microorganisms and record these observations

Antoni van Leeuwenhoek was the first person in history to

True

Koch’s postulated can be used to determine the causes of infectious diseases

Florence Nightingale

The first school of nursing was founded by

Fleming

Who discovered penicillin

Developing methods for reducing healthcare-associated infections

The work of Lister, Nightingale, and Semmelweis all contributed to controlling infectious disease by

Viral

The first true vaccine protected against disease caused by a… pathogen

Lister

Which individual pioneered the use of chemicals to reduce the incidence of infections during surgery?

Ignaz Semmelweis

Which health care pracitioner improved our understanding of the importance of hand washing?

Pasteur

The investigations of which researcher finally disproved that living organisms can come from nonliving substances?

He eliminated air from his flasks by sealing them

Spallanzani’s experiment concerning spontaneous generation were NOT universally accepted because…

His studies demonstrated the importance of good sewage treatment facilities and clean drinking water supplies

How was John Snow’s work significant to modern society?

Carbon and hydrogen

Organic compounds always contain which elements?

Ability to interact with other atoms

The valence of an atom represents its

Disaccharide

Sucrose is an example of which of the following?

Phospholipids

What lipid macromolecule forms most membranes of cells

Monosaccharides

What is the simplest type of carbohydrate

Ribose

DNA contains the sugar deoxyribose what sugar does rna contain?

They contain at least one double bond

What is NOT a characteristic of saturated dats ?

Hydrogen bonds

The double-strands of DNA result from the formation of… between the bases

Thymine

All the following bases are found in RNA molecules EXCEPT

Cytosine and thymine

Which of the following are examples of pyrimidines?

Purines

Which of the following is found in nucleic acids

Peptide

What type of bond joins amino acids together to form proteins?

empty magnification

An image is magnified is magnified so much resolution and contrast are lost

Millimeter

One-thousandth of a meter is a

Micrometer

1× 10 ^-6 m

Nanometeres

Viruses are generally measured in

The refraction of radiation as it passes through a lens

Which of the following phenomena produces magnification

Magnets

In a transmission electron microscope, the lenses are?

Compound microscope

What type of light microscope uses a series of lenses that together contribute to the total magnification of a specimen ?

Resolution and contrast

Staining is an important way to improve which of the following aspects of microscopy ?