An action potential has begun. What event happens first?
a. Gated sodium channels open.
b. Sodium ions leave the cell.
c. Gated potassium channels open.
d. Potassium ions leave the cell.
e. Gated sodium and gated potassium channels both open.
a
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Indicate whether the statement is true or false.
As radiation strikes molecules in cells, it creates ____
a. charged atoms called isotopes b. charged atoms called ions c. excess storage of tRNA d. excess copies of mRNA e. excess DNA polymerase
Phenotypically wild-type F1 female Drosophila, whose mothers had light eyes (lt) and fathers had straw (stw) bristles, produced the following offspring when crossed to homozygous light-straw males:
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The Gram-staining procedure is widely used because it allows rapid identification of a microorganism with little additional testing.
Answer the following statement true (T) or false (F)