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TLS Online TPP Program

#Question id: 32281

Carbohydrate chains in glycoproteins attached to the hydroxyl(-OH) group in serine and threonine residues are referred to as:

#Unit 2. Cellular Organization
  1. N-linked oligosaccharides
  2. O-linked oligosaccharides
  3. C-linked glycosylation
  4. GPI-anchored glycosylation
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TLS Online TPP Program

#Question id: 26881

#Unit 10. Ecological Principles

later arriving species are generally K-selected which are___
TLS Online TPP Program

#Question id: 9252

#Unit 9. Diversity of Life Forms

Which of these environmental factor(s) is/are the key determining factor(s) that control(s) the biotic structure of aquatic biomes?
TLS Online TPP Program

#Question id: 7204

#Unit 5. Developmental Biology

Following statements are regarding to anterior-posterior polarity in planaria.

A. The anterior expression of Notum functions to antagonize the posteriorly produced Wnt, leading to head specification.

B. Regulation of the balance between Wnt and Notum signals may underlie not only head-tail specification but also regulation of organ size.

C. In addition, there appears to be an anterior-to-posterior gradient of Erk signaling that functions as a positive inducer of tail specification.

D. Wnt signaling achieves its repression of head regeneration by inhibiting Erk. Therefore, only in those more anterior regions lacking Wnt (due to Notum’s repression of Wnt) can Erk induce head regeneration.

Which of the following statements are incorrect?
TLS Online TPP Program

#Question id: 32710

#Unit 1. Molecules and their Interaction Relevant to Biology

The relationship between activation energy and the rate constant of the reaction, k, is given by the 
TLS Online TPP Program

#Question id: 18003

#Unit 9. Diversity of Life Forms

In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg? 
1. micropyle 2. style 
3. ovary 4. stigma