The infectious dose of most pathogens is about equal
Indicate whether this statement is true or false.
FALSE
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The digestive structure that stores concentrated bile is the ____
a. duodenum b. gallbladder
c. liver d. pancreas e. stomach
When scientists use a radioactive or fluorescent probe to label target DNA fragments and then transfer the hybridized fragments to a nylon membrane, what is this process called?
a. Southern blotting b. Northern blotting c. gel electrophoresis d. molecular cloning
In the modification of eukaryotic mRNA, ________ cap and ________ tail are usually added to the transcript.
A) an acetylated-guanine; a poly-cytosine B) a poly-guanine; a methyl group C) a poly-thymine; an acetyl group D) a methylated-guanine; a poly-adenine E) a methylated-adenine; a poly-guanine
What effect does "pinching back" have on a houseplant?
a. increases apical dominance b. inhibits the growth of lateral buds c. produces a plant that will grow taller d. stimulates lateral buds to grow e. increases the flow of auxin down the shoot