One of the conclusions drawn from Darwin's theory of evolution is that:a
existing organisms can adapt to environmental changes
b. living organisms are composed of basic units called cells
c. living organisms contain substances produced by cells
d. genetic information can pass from organism to organism by means of DNA
e. organisms living today descended with modifications from previously existing forms
e
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Which of the following is part of the maturation of a eukaryotic mRNA?
1.removal of introns 2.the linking of exons 3.addition of the 5‘ cap 4.addition of the poly A tail 5.All of the options are correct.
Protists typically only reproduce sexually during
A. warm conditions. B. darkness. C. low pH conditions. D. stress. E. cold conditions.
Which of the following types of information would be most useful in an effort to move a DNA fragment from one plasmid vector to another, using molecular cloning techniques?
A. sequence of PCR primers B. restriction maps of the plasmids C. data from cloning of Dolly the sheep D. DNA fingerprint data
Duffy factor is due to a chemical that occurs on the membranes of red blood cells and is sometimes used as a blood-typing attribute in the same way that ABO and Rh factor blood types are used. Recent research has found that people with Duffy factor are
about 40% less likely to be infected with HIV, given similar circumstances. Given that HIV affects white blood cells, how would you characterize the Duffy factor gene, and why? What will be an ideal response?