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TLS Online TPP Program

#Question id: 33231

Which character makes concerted acid–base catalysis a common enzymatic mechanism?

#Unit 1. Molecules and their Interaction Relevant to Biology
  1. The side chains of the amino acid residues Asp, Glu, His, Cys, Tyr, and Lys have pK’s in or near the physiological pH range.
  2. Only His have pK’s in or near the physiological pH range.
  3. Only Cys & His have pK’s in or near the physiological pH range
  4. Only Tyr, Cys & His have pK’s in or near the physiological pH range
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TLS Online TPP Program

#Question id: 8955

#Unit 9. Diversity of Life Forms

Which of the following characteristics generally applies to protostome development?
TLS Online TPP Program

#Question id: 10978

#Unit 7. System Physiology – Animal

Which of the following events occurs at the end of the period of ventricular ejection?
TLS Online TPP Program

#Question id: 15190

#Unit 8. Inheritance Biology

The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?
TLS Online TPP Program

#Question id: 19083

#Unit 4. Cell Communication and Cell Signaling

Alternaria produces a toxin, which activates a plant cell death program in tomato (Solanum lycopersicum) leaves___
TLS Online TPP Program

#Question id: 26399

#Unit 3. Fundamental Processes

The origin enters S phase in the condition of a prereplication complex, which contains