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TLS Online TPP Program

#Question id: 13233

Tracheids are

#Unit 6. System Physiology – Plant
  1. dead cells and are connected to one another through perforation plates— regions of the wall where pores or holes have developed
  2. elongate, hollow, dead cells with highly lignified walls, the walls contain numerous pits— regions where secondary wall is absent but primary wall remains
  3. circular and tapered lignified cell in the xylem of only Angiosperm
  4. component of the phloem tissue
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TLS Online TPP Program

#Question id: 5134

#Unit 5. Developmental Biology

Match the following cleavage patterns with the species in which they occur.

        Species                                           Cleavage Pattern

      A. Flatworm                                       i. Meroblastic discoidal

      B. Frog                                               ii. Meroblastic superficial

      C. Birds                                              iii. Holoblastic displaced radial

      D. Insect                                              iv. Holoblastic spiral
TLS Online TPP Program

#Question id: 5934

#General Aptitude

September 13 , 1992 was a Sunday . Then which of the following is true ?
TLS Online TPP Program

#Question id: 15411

#Unit 8. Inheritance Biology

Both X-linked genes and extranuclear inheritance produce different results in reciprocal crosses. How can you distinguish between them?
TLS Online TPP Program

#Question id: 14081

#Unit 1. Molecules and their Interaction Relevant to Biology

pKa of cytosine normally has a value of 4.2 but in hoogsteen triple base pairing this value changes to 
TLS Online TPP Program

#Question id: 11492

#Unit 2. Cellular Organization

Which of the following integral membrane protein transport chemotherapeutic drug out of the cell and prevents their accumulation within a tumor and thus blocks their therapeutic effects?