Adapter molecules associate covalently with their respective antigen receptors in the membrane
Indicate whether the statement is true or false.
Answer: FALSE
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Which plant cells are the most common and the least specialized?
A. epidermis B. collenchyma C. sclerenchyma D. parenchyma E. meristem
The production of toxin by the rough-skinned newts, which deters many predators, is an
example of __________.
a. an adaptation b. adaptive radiation c. sexual selection d. coevolution
In step "b" the original strands have separated because
a. the hydrogen bonds between bases were broken. b. the sugar-phosphate linkages broke. c. the polymerases stopped functioning. d. the bases repelled each other. e. water changed the bases into their subunits.
Medicines are often administered in pill form. In many cases, the active ingredient of the pill (the drug) is joined to another substance by ________. This forms a(n) ________, which is stable in the dry environment of a pill bottle but dissociates under
the wet conditions of the digestive system to release the drug to the body. A) ionic bonds; salt B) hydrogen bonds; base C) ionic bonds; acid D) covalent bonds; salt