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TLS Online TPP Program

#Question id: 10809

Sieve element sap is rich in sugars and other organic molecules, These molecules represent an energy investment for the plant. How their loss be prevented when sieve elements are damaged?

#I Life Science/ Life Sciences Group – I-V
  1. Short-term sealing mechanisms not involve sap proteins
  2. long-term mechanism for preventing sap loss entails closing sieve plate pores with callose   
  3. For preventing sap loss using smooth endoplasmic reticulum (SER) which covers the sieve areas  
  4. long-term mechanism for preventing sap loss opening of the sieve tube in angiosperm
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TLS Online TPP Program

#Question id: 852

#SCPH05 I Biotechnology

.________ enzyme revealed the relation between the amino acid sequence of a protein and its conformation.
TLS Online TPP Program

#Question id: 4975

#SCPH06 I Botany

The observation that tusks were limited to males in several species, and were apparently not used in food-gathering, is evidence that the tusks probably
TLS Online TPP Program

#Question id: 7698

#SCPH06 I Botany

Which tree shows the greatest evolutionary distance between chytrids and ascomycetes?


TLS Online TPP Program

#Question id: 2109

#SCPH28 | Zoology

A phospholipid bilayer with equal amounts of saturated and unsaturated fatty acids displays a specific permeability to glucose. What effect will increasing the proportion of unsaturated fatty acids in the bilayer have on the membrane's permeability to glucose?
TLS Online TPP Program

#Question id: 564

#SCPH05 I Biotechnology

A good transition-state analog: