During gel electrophoresis, DNA fragments are separated by size
a. True
b. False
True
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How is the bond in F2 different from the bond in KCl?
A. F2 is covalent and KCl is ionic B. F2 and KCl are both ionic C. F2 is ionic and KCl is covalent
Which of the following best describes the presence of gill structures in vertebrate embryos and tail structures in embryos in the great apes?
a. These are vestigial structures that are residual parts from a past common ancestor. b. These structures continue to be necessary for survival in the adult form of these organisms. c. These structures show that these species have been isolated since the separation of the supercontinent Gondwana. d. Vertebrate organisms are more closely related to fish than to marsupials.
Ephedrine is a stimulant that is derived from a member of the phylum
A. Cycadophyta. B. Pterophyta. C. Hepaticophyta. D. Gnetophyta.
Consider a biochemical pathway that branches to form two different products. If the end product of one of the branches is present in a large amount, at what point would the pathway be regulated to ensure adequate production of the end product of the alternative pathway while slowing or stopping production of the product already present in excess?
A. At the last step in the pathway to the product in excess B. At the point where the two pathways branch C. At the last step in the pathway to the alternative product still needed D. At the very first step in the entire pathway