In the Early 1950s,James Watson and Francis Crick ____

question 34

Multiple Choice

In the early 1950s,James Watson and Francis Crick ____.

• A) were awarded the Nobel Prize for Medicine or Physiology
• B) combined all of their previous research in order to explain the structure of DNA
• C) began to work out the structure of DNA by organizing the information about DNA that was already available
• D) produced X-ray diffraction photographs from highly purified DNA samples
• E) isolated two strains of S. pneumoniae and used them to further research the structure of DNA

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Definitions:

Clean-Catch Midstream

A method of urine collection that involves cleansing the genital area and collecting urine midstream to minimize contamination.

Urine Culture

A laboratory test in which urine is placed on a growth medium and bacteria are allowed to grow for 24 to 48 hours. Any large growths of bacteria are then identified. Urine cultures are often followed by a sensitivity or susceptibility test to determine which antibiotic will be most effective against the bacteria.

Pathogens

Microorganisms that can cause disease in humans or other organisms, including viruses, bacteria, fungi, and parasites.

Timed Urine Specimen

A test requiring urine collection over a specific period, such as 24 hours, to measure various components for medical diagnosis.