A bivalent at prophase I contains ________ chromatids
A) three B) eight C) two D) four E) one
Answer: D
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The most species-rich groups of fungi are those with dikaryotic growth forms
Indicate whether the statement is true or false.
A nerve cell returns to the resting potential as ______ ions leave the cell
a. sodium b. potassium c. calcium d. chloride e. ammonium
At which one of the following checkpoints might the cell cycle be halted if all of the DNA has not yet been replicated?
A) G1 B) G2 C) M D) T E) S
Assume the two E.coli strains shown below are allowed to conjugate. Hfr: pro+, arg+, his+, lys+, met+, ampicillin-sensitive F-: pro-, arg-, his-, lys-, met-, ampicillin-resistant What supplements would you add to glucose minimal salts agar to select for a recombinant cell that is lys+, arg+, amp-resistant?
A) ampicillin, lysine, arginine B) lysine, arginine C) ampicillin, proline, histidine, methionine D) proline, histidine, methionine E) ampicillin, proline, histidine, lysine