TLS Online TPP Program

#Question id: 8680


Giardia intestinalis can cause disease in several different mammalian species, including humans. Giardia organisms (G. intestinalis) that infect humans are similar morphologically to those that infect other mammals, thus they have been considered a single species. However, G. intestinalis has been divided into different subgroups based on their host and a few other characteristics. In 1999, a DNA sequence comparison study tested the hypothesis that these subgroups actually constitute different species. The following phylogenetic tree was constructed from the sequence comparison of rRNA from several subgroups of G. intestinalis and a few other morphologically distinct species of Giardia. The researchers concluded that the subgroups of Giardia are sufficiently different from one another genetically that they could be considered different species


By examining the phylogenetic tree diagrammed in the figure above, what conclusion can you draw about the species G. microti?

#SCPH06 I Botany
  1. It evolved before G. intestinalis.
  2. It is more closely related to G. muris than to G. intestinalis.
  3. It should not be labeled a species distinct from G. intestinalis.
  4. It is part of a monophyletic group that also includes G. intestinalis.
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TLS Online TPP Program

#Question id: 18687

#SCPH05 I Biotechnology

Homology modeling involves 

TLS Online TPP Program

#Question id: 18688

#SCPH01 Biochemistry

Match the items in Group 1 with an appropriate description in Group 2 
Group I                                      Group 2 
P. GOR method                           1. Protein structure visualization 
Q. Genome sequencing           2. Sanger method
R. ESTs                                         3. Protein secondary structure prediction
S. RasMol                                    4. gene expressed as cDNA

TLS Online TPP Program

#Question id: 18688

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

Match the items in Group 1 with an appropriate description in Group 2 
Group I                                      Group 2 
P. GOR method                           1. Protein structure visualization 
Q. Genome sequencing           2. Sanger method
R. ESTs                                         3. Protein secondary structure prediction
S. RasMol                                    4. gene expressed as cDNA

TLS Online TPP Program

#Question id: 18688

#SCPH05 I Biotechnology

Match the items in Group 1 with an appropriate description in Group 2 
Group I                                      Group 2 
P. GOR method                           1. Protein structure visualization 
Q. Genome sequencing           2. Sanger method
R. ESTs                                         3. Protein secondary structure prediction
S. RasMol                                    4. gene expressed as cDNA

TLS Online TPP Program

#Question id: 18689

#SCPH01 Biochemistry

Ab initio approach makes structural predictions based on 

TLS Online TPP Program

#Question id: 18689

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

Ab initio approach makes structural predictions based on