TLS Online TPP Program

#Question id: 1266


Integrins

#SCPH05 I Biotechnology
  1. are heterodimeric proteins.          

  2. bind to the tripeptide sequence Arg-Gly-Asp (RGD).

  3. are expressed in a cell-specific manner.

  4. have high-affinity binding sites (KD > 10-9 mol/L) for their ligands.

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TLS Online TPP Program

#Question id: 304

#I Life Science/ Life Sciences Group – I-V

As compared to covalent compounds electrovalent compounds generally possess ___________

TLS Online TPP Program

#Question id: 15143

#SCPH05 I Biotechnology

Which one of the following is a depiction of the GenBank sequence entry format?

TLS Online TPP Program

#Question id: 17272

#SCPH06 I Botany

We need to minimum buffering capacity is required so that the pH value of the samples analyzed does not have any influence on the system, 
What would happen if we used the higher buffering concentration
a) more electric power is applied, resulting in higher heat development. 
b) less electric power for less time  is applied, resulting in very high  heat development
c) higher buffering concentration need more electric power resulting increases in the temperature will increase the mobility and rate of migration of ions.
d) using the higher buffering concentration shows no affect at all

TLS Online TPP Program

#Question id: 11333

#SCPH06 I Botany

Small geographic areas with high concentrations of endemic species and a large number of endangered and threatened species are known as

TLS Online TPP Program

#Question id: 15619

#SCPH28 | Zoology

Wild type E. coli metabolizes the sugar lactose by expressing the enzyme ß-galactosidase. You have isolated a mutant that you call lac1–, which cannot synthesize ß-galactosidase and cannot grow on lactose (Lac–). During an condition isolate a mutation that constitutively expresses abnormally high levels of ßgalactosidase, which you designate lacc. Preliminary P1 transduction experiments indicate that lacc  is linked to the Tn5 insertion.  To map lacc  relative to lac1– you set up two reciprocal crosses. In the first cross you grow P1 on a strain that carries the Tn5 insertion and the lac1– mutation. You then use this lysate to infect a lacc mutant and select for Kanr. From 100 Kanr transductants examined, 20 are Lac–, 76 express ß-galactosidase constitutively and 4 show normal ß-galactosidase expression. In the second cross you grow P1 on a strain that carries the Tn5 insertion and the lacc mutation. You then use this lysate to infect a lac1– mutant, and select for Kanr. From 100 Kanr transductants examined, 81 are Lac– and 19  express ß-galactosidase constitutively. So what will be the correct order of  the Tn5 insertion and the lac1– and lacc  mutations. Express any measured distances as cotransduction frequencies.