Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 52876
TLS Online TPP Program

#Question id: 17274

which of the following statement is incorrect about PSI-BLAST?

#SCPH01 Biochemistry
  1. The main feature of PSI-BLAST is that profiles are constructed automatically and are fine-tuned in each successive cycle. 
  2. PSI-BLAST employs a weighting scheme in the profile construction in each iteration to increase sensitivity.
  3. To increase sensitivity of PSI-BLAST, it uses pseudocounts to provide extra weight to unobserved residues to make the profile more inclusive.
  4. None of the above.
More Questions
TLS Online TPP Program

#Question id: 15638

#SCPH01 Biochemistry

You have isolated two mutations that show decreased expression of the Lac operon. However, unlike like the promoter mutations, these mutations don’t respond to the inducer IPTG. These mutations, designated Lac3– and Lac4–, are evaluated for the quantity of ß-galactosidase and permease activity expressed with or without IPTG:
 
Mapping experiments reveal that Lac3– and Lac4– are different short deletions located in the region before the start of the LacZ gene. Given the data shown above suggest which genetic element(s) in addition to part of the promoter has been deleted in each mutant. 
TLS Online TPP Program

#Question id: 15638

#SCPH06 I Botany

You have isolated two mutations that show decreased expression of the Lac operon. However, unlike like the promoter mutations, these mutations don’t respond to the inducer IPTG. These mutations, designated Lac3– and Lac4–, are evaluated for the quantity of ß-galactosidase and permease activity expressed with or without IPTG:
 
Mapping experiments reveal that Lac3– and Lac4– are different short deletions located in the region before the start of the LacZ gene. Given the data shown above suggest which genetic element(s) in addition to part of the promoter has been deleted in each mutant. 
TLS Online TPP Program

#Question id: 15638

#SCPH28 | Zoology

You have isolated two mutations that show decreased expression of the Lac operon. However, unlike like the promoter mutations, these mutations don’t respond to the inducer IPTG. These mutations, designated Lac3– and Lac4–, are evaluated for the quantity of ß-galactosidase and permease activity expressed with or without IPTG:
 
Mapping experiments reveal that Lac3– and Lac4– are different short deletions located in the region before the start of the LacZ gene. Given the data shown above suggest which genetic element(s) in addition to part of the promoter has been deleted in each mutant. 
TLS Online TPP Program

#Question id: 15642

#SCPH05 I Biotechnology

The viscosity of a fluid decreases with increasing stirrer speed. This fluid would be best described as being:
TLS Online TPP Program

#Question id: 15643

#SCPH05 I Biotechnology

The decrease in apparent viscosity of a liquid with increasing shear rate, is known as
TLS Online TPP Program

#Question id: 15644

#SCPH05 I Biotechnology

Based on the flow behavior of fluids depicted in the following figure. choose the correct option.