Yeast cells are recovered from a fermentation broth by using a tubular centrifuge. Sixty percent (60%) of the cells are recovered at a flow rate of 12 l/min with a rotational speed of 4000 rpm. Recovery is inversely proportional to flow rate. At a constant rpm of 4000 rpm, what should be the flow rate to result in 95% cell recovery?

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#Question id: 641

#Section 2: General Biology

Which of the following does NOT describe a mechanism that cells use to regulate enzyme activities?

A. Cells control enzyme activity by phosphorylation and dephosphorylation.

B. Cells control enzyme activity by the binding of small molecules.

C. Cells control the rates of diffusion of substrates to enzymes.

D. Cells control the rates of enzyme degradation.

E. Cells control the rates of enzyme synthesis.

F. Cells control the targeting of enzymes to specific organelles. 

#Question id: 3730

#Section 3: Genetics, Cellular and Molecular Biology

Which is not part of the replisome?

#Question id: 3933

#Section 3: Genetics, Cellular and Molecular Biology

A gene contains two 100 bp introns and three 50 bp exons. About how long is the mature RNA transcribed from this gene?

#Question id: 3270

#Section 3: Genetics, Cellular and Molecular Biology

Heterozygote advantage should be most closely linked to which of the following?

#Question id: 15631

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology