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TLS Online TPP Program

#Question id: 31129

In the lipid rafts:

#Unit 2. Cellular Organization
  1. Short, saturated acyl groups of sphingolipids can form more compact, more stable associations with the cholesterol
  2. Long, saturated acyl groups of sphingolipids can form more compact, more stable associations with the cholesterol
  3. Short, unsaturated acyl groups of sphingolipids can form more compact, more stable associations with the cholesterol
  4. Long, unsaturated acyl groups of sphingolipids can form more compact, more stable associations with the cholesterol
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TLS Online TPP Program

#Question id: 28985

#Unit 7. System Physiology – Animal

Norepinephrine is formed by which of the following process?
I- hydroxylation followed by decarboxylation of tyrosine
II- by conversion of dopamine in presence of dopamine β -hydroxylase enzyme
TLS Online TPP Program

#Question id: 28235

#Unit 5. Developmental Biology

 Principles of stem cell regulation including extracellular mechanism which define the physical and chemical regulation, which of the following statements best describe the main differences between these two mechanism?
a) physical mechanism takes the form of secreted proteins from surrounding cells that influence stem cell & progenitor differentiation through endocrine
b) Chemical mechanisms including Structural & adhesion factors within the extracellular matrix 
c) physical mechanisms including Structural & adhesion factors within the extracellular matrix 
d) chemical regulation of stem cells takes the form of secreted proteins from surrounding cells that influence stem cell & progenitor differentiation through endocrine
TLS Online TPP Program

#Question id: 31284

#Unit 5. Developmental Biology

In drosophila, gurken signal is received by the follicle through a receptor protein encoded by the: 
TLS Online TPP Program

#Question id: 9566

#Unit 10. Ecological Principles

Which of the following adaptations helps kangaroo  rats conserve water?
TLS Online TPP Program

#Question id: 19111

#Unit 8. Inheritance Biology

If the frequency of PKU among newborns is approximately 1/10,000 (when the parents are unrelated). What is the risk of a child with PKU if the parents are uncle and niece?