TLS Online TPP Program

#Question id: 5720


Which two of the following are the CORRECT statements ?

P. Nondisjunction in the parental meiosis is not essential to produce diploid organisms

Q. Nondisjunction in the parental meiosis is essential to produce aneuploid organisms

R. Nondisjunction in the parental meiosis is essential to produce hexaploid organism

S. Nondisjunction in the parental meiosis is essential to produce tetraploid organisms

#Unit 8. Inheritance Biology
  1. P,Q      

  2. Q,R     

  3. R,S             

  4. P,S

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TLS Online TPP Program

#Question id: 1515

#Unit 4. Cell Communication and Cell Signaling

Following statements are regarding to metastasis (using breast carcinoma cells as an example).

A. Cancer cells leave the main tumor and attack the basement membrane, using extracellular matrix (ECM) fibers to reach the blood vessels.

B. The cancer cells can be attracted by signals such as epidermal growth factor (EGF), which can be secreted by macrophages.

C. At the blood vessels they penetrate the layer of endothelial cells that forms the vessel walls and enter the bloodstream.

D. Carcinoma cells penetrate the extracellular matrix and blood vessel wall by extending “invadopodia,” which produce matrix metalloproteases and other proteases to open up a path.

Which of the following statement shows process of angiogenesis?

TLS Online TPP Program

#Question id: 23214

#Unit 13. Methods in Biology

Which type of interaction forces are involved in atomic force microscope?

TLS Online TPP Program

#Question id: 4914

#Unit 8. Inheritance Biology

German scientist Carl Correns found that the inheritance of variegated color on the leaves of certain plants was determined only by the maternal parent. What phenomenon explains this pattern of inheritance?

TLS Online TPP Program

#Question id: 11288

#Unit 10. Ecological Principles

Below is a table showing the number of species and actual food web links observed in three different ecosystems. By calculating connectance as a measure of relative complexity of food webs, which of the following ecosystem are more complex? 


TLS Online TPP Program

#Question id: 14493

#Unit 13. Methods in Biology

The probability of the horse A winning the race is 1/5 and the probability of the horse B winning the same race is 1/6, then the probability of one of the horse to win the race is