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TLS Online TPP Program

#Question id: 257

ʺFive prime to three primeʺ description of a DNA strand refers to

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. the phosphorylated 5ʹ carbon at one end, the 3ʹ at the other end.

  2. the location of the hydroxyl groups.

  3. the phosphodiester backbone of DNA.

  4. the phosphorylated 5ʹ carbon on one sugar and the 3ʹ carbon on the next sugar.

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TLS Online TPP Program

#Question id: 1828

#Unit 4. Cell Communication and Cell Signaling

Toxins are neutralized by:
TLS Online TPP Program

#Question id: 135

#Unit 1. Molecules and their Interaction Relevant to Biology

 Concentrations of some proteins cannot be estimated by UV spectrophotometry because they are
TLS Online TPP Program

#Question id: 31174

#Unit 7. System Physiology – Animal

Excitatory postsynaptic potential (EPSP) is produced by: 
TLS Online TPP Program

#Question id: 5142

#Unit 5. Developmental Biology

The D set of blastomeres is the “organizer” of snail embryos. Experiments have demonstrated that the non-diffusible polar lobe [cortical] cytoplasm that is localized to the D blastomere is extremely important in normal molluscan development.  Which of the following is incorrect?
TLS Online TPP Program

#Question id: 12464

#Unit 10. Ecological Principles

A secondary consumer, such as a fox, receives what percent of the energy fixed by primary producers in a typical field ecosystem?