Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 52605
TLS Online TPP Program

#Question id: 16129

5 You are studying regulation of the yeast enzyme glutamine synthetase (GS), which is encoded by the GLN1 gene. You have isolated two mutants, designated gln2– and gln3–, that give decreased GS activity. Mating of either gln2– or gln3– haploids to wild type produces heterozygous diploids that show normal amounts of GS expression. When you cross either a gln2– or gln3– haploid to a gln1– strain the resulting diploids show normal expression of GS.
Describe the cis-acting elements in the GLN1 promoter that are evident from these experiments, giving both their position and as much of their function as you can deduce.

#SCPH01 Biochemistry
  1. Deletion1 : GLN2 function, Deletions 3, 4 : GLN3 function, contain TATA, Deletion 6: sequence contain UAS Sequence -involved in activation.
  2. Deletion1 : GLN3 function, Deletions 3, 4 : GLN2 function, contain UAS Sequence -involved in activation, Deletion 6: contain TATA sequence.
  3. Deletion1 : GLN2 function, Deletions 3, 4 : GLN3 function, contain UAS Sequence -involved in activation, Deletion 6: contain TATA sequence.
  4. Deletion1, 3 and 4 : GLN3 function, contain UAS Sequence -involved in activation, Deletion 6: contain TATA sequence.
More Questions
TLS Online TPP Program

#Question id: 27906

#Research Methodology

In carrying out the research, the researcher should engage properly and thoroughly with:
TLS Online TPP Program

#Question id: 1670

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

The T-cell receptor genes were originally identified using:
TLS Online TPP Program

#Question id: 5546

#SCPH06 I Botany

By the end of _______________ , distribution of cells into the three primary tissue types has been completed
TLS Online TPP Program

#Question id: 100

#SCPH28 | Zoology

Which of the following contain NeuNAc residues and sulfated sugars, and their negative charges contribute to the viscosity of mucins.
TLS Online TPP Program

#Question id: 5250

#SCPH28 | Zoology

A researcher would like to map the location of galE and trpA genes in a new species of bacterium that appears to be closely related to E. coli. He decides to use cotransduction, and generatesnappropriate donor and recipient strains. He is disappointed when cotransduction is not seen in his experiement. What is the most reasonable explanation for this situation?