TLS Online TPP Program

#Question id: 142


Histidine has pKa values of 1.8, 6.0 (R-group) and 9.3 . At pH 8.0, the net charge on histidine is

#Section 2: General Biology
  1. positive.

  2. negative.

  3. neutral (uncharged). 

  4. insufficient information to tell.

More Questions
TLS Online TPP Program

#Question id: 10524

#Section 6: Plant, Animal and Microbial Biotechnology

Members of the Poaceae family, which includes all of the cereal crops, use benzoxazinoids, these alkaloids shows;

a) Alkaloids are derived from the tryptophan as constitutively produced defensive secondary metabolites

b) These benzoxazinoids such as DIBOA and its derivative DIMBOA are usually stored in the peroxisome

c) Upon damage, the inactive glycosides are hydrolyzed, generating glucosinolate, which are toxic not only to insect herbivores but also against pathogens

d) DIBOA and DIMBOA perform insecticidal and pesticidal activities

e) It can be inactivated by hydroxylation and N-glycosylation reactions

Which of the following combination is correct about benzoxazinoids alkaloids?

TLS Online TPP Program

#Question id: 571

#Section 2: General Biology

The steady state assumption, as applied to enzyme kinetics, implies:

TLS Online TPP Program

#Question id: 4917

#Section 3: Genetics, Cellular and Molecular Biology

Cytoplasmic male sterility in maize is manifestation of interaction between

TLS Online TPP Program

#Question id: 2921

#Section 3: Genetics, Cellular and Molecular Biology

During which stage of the cell cycle is the chromosome content of a mammalian liver cell 1n?

TLS Online TPP Program

#Question id: 17210

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

which one of the following tools can reliably establish an evolutionary link between two proteins and align them even if they share very low degree of sequence similarity?