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TLS Online TPP Program

#Question id: 3870

“Footprinting” or DNase protection is a technique used to identify:

#Unit 3. Fundamental Processes

  1. a region of DNA that has been damaged by mutation.

  2. E. coli cells that contain a desired, cloned piece of DNA.

  3. the position of a particular gene of a chromosome.

  4. the specific binding site of a repressor, polymerase, or other protein on the DNA.

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TLS Online TPP Program

#Question id: 8955

#Unit 9. Diversity of Life Forms

Which of the following characteristics generally applies to protostome development?
TLS Online TPP Program

#Question id: 15994

#Unit 12. Applied Biology

Somaclonal variation may arise due to following events at molecular level, except.
TLS Online TPP Program

#Question id: 8925

#Unit 9. Diversity of Life Forms

What is the probable sequence in which the following clades of animals originated, from earliest to most recent?
1. tetrapods
2. vertebrates
3. deuterostomes
4. amniotes
5. bilaterians
TLS Online TPP Program

#Question id: 5666

#Unit 5. Developmental Biology

 When the extracellular side of the receptor binds resact, it activates latent guanylyl cyclase in the cytoplasmic side of the receptor. Active guanylyl cyclase causes the sperm cell to produce more cyclic GMP (cGMP), this compound_____
TLS Online TPP Program

#Question id: 5675

#Unit 5. Developmental Biology

Following are the statements related to mammalian chaemotaxis:

A. During chaemotaxis, the oocyte and its accompanying cumulus cells secrete molecules that attract only uncapacitated sperm toward the egg during the last stages of sperm migration.

B. These chaemotactic compound are hormone progesterone, which is made by the cumulus cells.

C. Progesterone has been shown to bind to a receptor that activates Ca2+ channels in the cell membrane of the sperm tail, leading to sperm hyperactivity and provides directional cue.

D. Cumulus cells also secrete a substance, CRISP1, that attracts sperm and hyperactivates them through CatSper channels similar as in sea urchins.

Which of  the following statement is incorrect?