All of the Following Statements About a Heart Valve Are

question 77

Multiple Choice

All of the following statements about a heart valve are true EXCEPT

• A) The root for heart valve is valvul/o.
• B) The heart has four valves.
• C) The purpose of heart valves is to prevent blood from flowing backward.
• D) All of the statements are true.

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Definitions:

Meselson and Stahl

This refers to the scientists Matthew Meselson and Franklin Stahl who, in 1958, conducted an experiment providing evidence supporting the semi-conservative model of DNA replication.

Nucleotide Bases

The building blocks of DNA and RNA, consisting of adenine, cytosine, guanine, thymine (DNA), and uracil (RNA).

Chargaff

Refers to Chargaff's rules, which state that DNA from any cell of all organisms should have a 1:1 ratio (base pair rule) of pyrimidine and purine bases.

35S

A radioactive isotope of sulfur, often used in biological research to label molecules in studies of molecular biology and biochemistry.