Four of the five scientists listed below were involved
in the development of the double helix idea of DNA.
Select the exception.
a. Wilkins
b. Griffith
c. Watson
d. Franklin
e. Crick
Answer: b
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Lisa has a rare genetic defect that causes acute sun-sensitivity. Her mother has the defect, but her father does not. All of Lisa's siblings, two brothers and a sister, are also affected. All four siblings are married, but none of their spouses has the mutant gene. Draw a pedigree for this family. Identify and explain the most likely mode of transmission for this disorder
What will be an ideal response?
The primary purpose of the light-dependent reactions is to
a. provide electrons and energy for the light-independent reactions. b. generate O2 gas. c. make ADP in cyclic photophosphorylation. d. transfer electrons to the primary electron acceptors. e. produce sugars such as glucose.
Experiments like those first performed by Miller and Urey demonstrated that
a. amino acids and other organic compounds could form in conditions that mimicked the earth's early atmosphere. b. a lipid-protein film will eventually be formed by thermal convection. c. DNA forms readily and reproduces itself. d. complete, functioning prokaryotic cells are formed after approximately three months. e. meteorites contained organic compounds.
The force of the original vibrations entering the ear is amplified by the
a. organ of Corti. b. oval window. c. round window. d. Eustachian tube. e. semicircular canals.