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TLS Online TPP Program
#Question id: 16129
#Unit 13. Methods in Biology
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.
TLS Online TPP Program
#Question id: 2515
#Unit 2. Cellular Organization
Which of the following cell types would be the best source of actin?
TLS Online TPP Program
#Question id: 27014
#Unit 10. Ecological Principles
competition can be observed between plants, where one species produces & secrete chemicals & inhibits the growth of another species, is an example of
TLS Online TPP Program
#Question id: 2695
#Unit 2. Cellular Organization
Which of the following palindromes is not a restriction site?
TLS Online TPP Program
#Question id: 1613
#Unit 4. Cell Communication and Cell Signaling
Complement component C3 is cleaved by: