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TLS Online TPP Program

#Question id: 9234

What is a critical load?

#Unit 9. Diversity of Life Forms
  1. the amount of nutrient augmentation necessary to bring a depleted habitat back to its former level
  2. the level of a given toxin in an ecosystem that is lethal to 50 percent of the species present
  3. the amount of added nutrient that can be absorbed by plants without damaging ecosystem integrity

  4. the number of predators an ecosystem can support that effectively culls prey populations to healthy levels

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TLS Online TPP Program

#Question id: 27401

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is an example of archaebacterial membrane lipid
TLS Online TPP Program

#Question id: 27402

#Unit 1. Molecules and their Interaction Relevant to Biology

In which of the following lipid two phosphatidic acids share a single glycerol (R1 and R2 are fatty acyl groups).
TLS Online TPP Program

#Question id: 27403

#Unit 1. Molecules and their Interaction Relevant to Biology

Precursor for the sphingosine is
TLS Online TPP Program

#Question id: 27404

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statement is correct regarding the Structural Lipids in Membranes

1.It acts as a barrier to the passage of polar molecules and ions

2.Membrane lipids are amphipathic: one end of the molecule is hydrophobic, the other hydrophilic

3.Membrane bilayers are formed only by the hydrophobic interaction only 

4.Both hydrophobic and hydrophilic interactions are responsible for membrane bilayer formation
TLS Online TPP Program

#Question id: 27405

#Unit 1. Molecules and their Interaction Relevant to Biology

Some of the following structural features of lipids are given which of the following is incorrect 
TLS Online TPP Program

#Question id: 27406

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following enzymes that catalyze the hydrolysis of stored triacylglycerols, releasing fatty acids for export to sites where they are required as fuel