Whose work with fruit flies presented the first clear evidence that the genes determining Mendelian traits reside on chromosomes?
A. Thomas Hunt Morgan
B. Gregor Mendel
C. Karl Correns
D. Walter Sutton
Answer: A
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It has been suggested that chaperonin overexpression in cells promotes genetic variation and enzyme evolution. This is probably because chaperonins can:
A. alter the accuracy of transcription. B. alter the accuracy of translation. C. promote degradation of less stable protein variants. D. promote folding of less stable protein variants. E. form aggregates with increased binding capabilities.
In DNA replication,
A) parental DNA shatters into pieces and joins with newly-synthesized pieces to fashion two double helices from one. B) parental DNA remains intact but guides formation of new double helices. C) the parental DNA splits and free nucleotides bond to their complements, building two DNA molecules from one. D) an entirely new double helix is built using information in the sequence of amino acids.
The number of resident species in estuaries tend to be ___________ relative to nearby aquatic ecosystems
a. an order of magnitude higher b. greater c. about the same d. fewer
If a person has a herniated disk, sometimes surgery can relieve the pain that is associated with the condition. However, one side effect can be a loss in spinal flexibility. Why does this loss occur?
What will be an ideal response?