Practice Questions

TLS Online TPP Program

#Question id: 542

Hamsters love to run on exercise wheels. Prolonged running at a high rate of speed requires ATP. Could a hamster with a defective gene for the enzyme lactate dehydrogenase meet the extra ATP demand for prolonged, fast wheel-running by maintaining a high rate of glycolysis? Why or why not?

#Section 4: Fundamentals of Biological Engineering

No, not enough NAD+ can be regenerated for glycolysis to continue at a high rate.
No, the defective gene will cause a rapid decline in pH in the muscles used for running.
Yes, the defective enzyme has no effect on the glycolytic pathway.
Yes, the enzyme alcohol dehydrogenase will supply the needed NAD+ if the lactose dehydrogenase cannot.

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TLS Online TPP Program

#Question id: 3795

#Section 3: Genetics, Cellular and Molecular Biology

The exonuclease activity of the DNA polymerases functions to:

TLS Online TPP Program

#Question id: 27315

#Section 5: Bioprocess Engineering and Process Biotechnology

In an exponentially growing batch culture of Saccharomyces cerevisiae, the cell density is 30 𝑔𝐿−1(𝐷𝐶W), the specific growth rate (𝜇) is 0. 4ℎ−1 and substate uptake rate (rs) is 18𝑔𝐿−1ℎ−1. The cell yield coefficient 𝑌𝗑/𝑠 will be

TLS Online TPP Program

#Question id: 9268

#Section 2: General Biology

The most active photosynthetic tissue in higher plants is the

TLS Online TPP Program

#Question id: 1584

#Section 2: General Biology

Which cell type interacts with both the humoral and cell-mediated immune pathways?

TLS Online TPP Program

#Question id: 145

#Section 2: General Biology

The pKaʹs of isoleucineʹs α-Carboxyl group and α-Amino group are 2.3 and 9.8, respectively. Calculate the isoelectric point.