Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 42789
TLS Online TPP Program

#Question id: 378

Which of the following statements about buffers is true?

#SCPH05 I Biotechnology

  1. A buffer composed of a weak acid of pKa = 5 is stronger at pH 4 than at pH 6.

  2. At pH values higher than the pKa, the salt concentration is higher than that of the acid.

  3. The strongest buffers are those composed of strong acids and strong bases.

  4. When pH = pKa, the weak acid and salt concentrations in a buffer are equal.

More Questions
TLS Online TPP Program

#Question id: 4132

#SCPH05 I Biotechnology

In E. coli, aminoacyl-tRNA synthetases:
TLS Online TPP Program

#Question id: 10550

#SCPH05 I Biotechnology

Plants, in turn, evolved a second line of defense that recognize these intracellular effectors and trigger defense responses to render them harmless. As a result, plants possess a second type of immunity called,
TLS Online TPP Program

#Question id: 2637

#SCPH28 | Zoology

Which of these operons is anabolic?
TLS Online TPP Program

#Question id: 4821

#SCPH12 I Genetics

What are frequency of recombination  if one cell carry out cross over every 50 cell undergoes meiosis ?
TLS Online TPP Program

#Question id: 15606

#SCPH01 Biochemistry

A biopolymer which is stable in extreme physical and chemical environments, and exhibits physical and chemical properties similar to those of a plastic known as