AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which two scientists are credited with discovering DNA?
A
Hershey and Chase
B
Franklin and Crick
C
Watson and Crick
D
Hershey and Franklin
Explanation: 

Detailed explanation-1: -Many people believe that American biologist James Watson and English physicist Francis Crick discovered DNA in the 1950s.

Detailed explanation-2: -Hershey and Chase were able to separate the phages into radioactive sulfur-containing protein ghosts and radioactive phosphorus-containing DNA. They found that the radioactive sulfur protein ghosts could attach to bacterial membranes while the radioactive phosphorus DNA could not.

Detailed explanation-3: -The molecule now known as DNA was first identified in the 1860s by a Swiss chemist called Johann Friedrich Miescher. Johann set out to research the key components of white blood cells?, part of our body’s immune system.

Detailed explanation-4: -Answer: Watson and Crick defined DNA as a double helix with two long helical strands twisted together in their paper titled A Structure of Deoxyribose Nucleic Acid. According to them, each DNA strand has discrete units known as bases. The bases along one DNA strand match the bases along the other DNA strand.

There is 1 question to complete.