Practice Questions

  1. Home
  2. Free Resources
  3. Practice Questions
  4. 39330
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
More Questions
TLS Online TPP Program

#Question id: 1705

#I Life Science/ Life Sciences Group – I-V

What is the single best definition of the most common form of antigen recognized by the T-cell receptor (TCR)
TLS Online TPP Program

#Question id: 819

#SCPH28 | Zoology

Heat treated protein’s losses its stability and some changes abruptly over a narrow range, which can be measured in terms of-
TLS Online TPP Program

#Question id: 4585

#SCPH06 I Botany

The cow Bos primigenius (which is bred for meat and milk) has a smaller brain and larger eyes than closely related wild species of ungulates. These traits most likely arose by ________.
TLS Online TPP Program

#Question id: 27193

#SCPH05 I Biotechnology

In a first order reaction, 10% of the reactant is consumed in 25 minutes. Calculate : 
(1) The half-life period of the reaction
TLS Online TPP Program

#Question id: 19343

#SCPH28 | Zoology

The Russian doll model and parchment model are two types of models used to describe the structure of ________carbon nanotube?