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TLS Online TPP Program

#Question id: 11331

Based on the intermediate disturbance hypothesis, a community’s species diversity is increased by

#Unit 10. Ecological Principles
  1. Frequent massive disturbance. 
  2. Stable conditions with no disturbance.   
  3. Moderate levels of disturbance.
  4. Human intervention to eliminate disturbance
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TLS Online TPP Program

#Question id: 33358

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following situations would produce a Hill plot with n<  1.0?
(a) The protein has multiple subunits, each with a single ligand-binding site. Binding of ligand to one site decreases the binding affinity of other sites for the ligand.
(b) The protein is a single polypeptide with two ligand-binding sites, each having a different affinity for the ligand.
(c) The protein is a single polypeptide with a single ligand-binding site.
TLS Online TPP Program

#Question id: 2818

#Unit 2. Cellular Organization

Human mitochondrial DNA
TLS Online TPP Program

#Question id: 1463

#Unit 4. Cell Communication and Cell Signaling

In colorectal cancer, several genes must be mutated for a cell to develop into a cancer cell. Which of the following kinds of genes would you expect to be mutated?
TLS Online TPP Program

#Question id: 177

#Unit 1. Molecules and their Interaction Relevant to Biology

The titration curve of alanine shows the ionization of two functional groups with pKa values of 2.34 and 9.69, corresponding to the ionization of the carboxyl and the protonated amino groups, respectively. The titration of di-, tri-, and larger oligopeptides of alanine also shows the ionization of only two functional groups, although the experimental pKa values are different. The trend in pKa values is summarized in the table. Which of the following is a reason for this shift in pK values
TLS Online TPP Program

#Question id: 1413

#Unit 4. Cell Communication and Cell Signaling

Which of the following is a feature that defines a cell dying in response to tissue damage (necrosis)?