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TLS Online TPP Program

#Question id: 11377

Which one of the following statements is correct?


#Unit 10. Ecological Principles
  1. Island A is likely to have higher extinction and lower colonization rates than Island B.
  2. Island B is likely to have higher extinction and lower colonization rates than Island C.
  3. Island E is likely to have lower extinction rates and higher colonization rates than Island C.
  4. Islands A and E are likely to have equal rates of extinction and colonization
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TLS Online TPP Program

#Question id: 4302

#Unit 3. Fundamental Processes

Which one of the following proteins is involved in promoter recognition in eukaryotes?
TLS Online TPP Program

#Question id: 3254

#Unit 11. Evolution and Behavior

Consider a single locus with 2 alleles which are at Hardy-Weinberg equilibrium. If the frequency of the heterozygous genotypes is 0.42, what is the frequency of one homozygote in the population?
TLS Online TPP Program

#Question id: 19905

#Unit 12. Applied Biology

Which one of the following sensors is used to determine the position of an object?
TLS Online TPP Program

#Question id: 11830

#Unit 6. System Physiology – Plant

Not all the ACC found in the tissue is converted to ethylene, ACC can also be converted to a conjugated form, which does not appear to break down and accumulates in the tissue?
TLS Online TPP Program

#Question id: 16131

#Unit 13. Methods in Biology

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.              
 How many units of ß-galactiosidase would you expect to be expressed from deletion 4 in a gln2– mutant?