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TLS Online TPP Program

#Question id: 18638

For unrooted trees, the number of unrooted tree topologies (NU) is ________

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology
  1. NU = (2n− 5)!/2n−3(n− 5)!
  2. NU = (2n− 5)!/2n−3(n− 3)!
  3. NU = (2n− 5)!/2−2(n− 3)!
  4. NU = (2n− 5)!/2n(n− 3)!
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TLS Online TPP Program

#Question id: 384

#Section 4: Fundamentals of Biological Engineering

A solution was prepared by dissolving 0.02 moles of acetic acid (HOAc; pKa = 4.8) in water to give 1 liter of solution. What is the pH? To this solution was then added 0.008 moles of concentrated sodium hydroxide (NaOH). What is the new pH? (In this problem, you may ignore changes in volume due to the addition of NaOH).
TLS Online TPP Program

#Question id: 385

#Section 4: Fundamentals of Biological Engineering

In which reaction below does water not participate as a reactant (rather than as a product)?
TLS Online TPP Program

#Question id: 386

#Section 4: Fundamentals of Biological Engineering

Which of the following properties of water does not contribute to the fitness of the aqueous environment for living organisms?
TLS Online TPP Program

#Question id: 387

#Section 4: Fundamentals of Biological Engineering

For a weak acid with a pKa of 6.0, What would be the ratio of acid to salt at pH 5.
TLS Online TPP Program

#Question id: 388

#Section 4: Fundamentals of Biological Engineering

Calculate the pH of a solution prepared by mixing 2.0 mL of a strong acid solution of pH=3.0 and 3.0 mL of a strong base of pH=10.0.
TLS Online TPP Program

#Question id: 389

#Section 4: Fundamentals of Biological Engineering

A weak acid HA has a pKa of 5.0.  If 1.0 mol of this acid and 0.1 mol of NaOH were dissolved in one liter of water, what would the final pH be?