In the experiment performed by Benzer for intragenic mapping which of the following is the most critical control?
A. Perform the experiment with each different virus alone to determine the rate of reversion mutation
B. Re-type the strain of E. coli
C. Test the agar to make sure it can support E. coli and viral growth
D. Perform at least five dilutions to make sure the dilutions were performed correctly
A
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Ions can be moved against the concentration gradient to create a difference in charge across that membrane. Later, the electrochemical gradient can be exploited by the cell to drive other processes. Respectively, what are these two mechanisms called?
a. primary passive transport, secondary passive transport b. primary sodium transport, secondary potassium transport c. primary active transport, secondary active transport d. primary electrical transport, secondary electrical transport
What limits the length of a food chain? What will be an ideal response?
During initiation of translation in both eukaryotes and prokaryotes the ________ binds before the ________
A) large ribosomal subunit; small ribosomal subunit B) small ribosomal subunit; large ribosomal subunit C) EF-Tu; tRNA D) EF-G; EF-Tu E) ribosomes; initiation factors
Which coenzyme is incorrectly matched with its function?
A) FAD / FMN: Electron transfers B) NAD+ /NADP+: Electron transfers C) THF / DHF: Make purines and pyrimidines D) Coenzyme A: Metabolism of pyruvic acid and lipids E) Cobalamin: Transfer of CO2 groups