Where does the bond form that binds one strand of DNA to its other strand?
A) Between the sugar and the base
B) Between the phosphate group and the sugar
C) Between the bases
D) Between the phosphate groups
C
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Most allergy medicines contain antihistamines that block the actions of histamine. These drugs reduce cold symptoms by directly
A. lysing virus-infected cells and preventing further propagation of the pathogen. B. stimulating components of the immune system through the release of cytokines. C. blocking or reducing the inflammation response in mucous membranes. D. stimulating the production of specific antibodies. E. recruiting macrophages to the nasal epithelium.
The sequences in mRNA that are not translated are the ____________________. Fill in the blank(s) with the appropriate word(s)
Regardless of its shape, a given orbital may contain no more than:
A. 1 electron. B. 4 electrons. C. 8 electrons. D. 2 electrons.
Organisms that can interbreed with each other in nature but are genetically isolated from all other organisms are a:
A) species. B) clone. C) genus. D) family.