TLS Online TPP Program

#Question id: 1984


Which of the following is a pathway that would lead to the activation of cytotoxic T cells?

#Section 2: General Biology
  1. B cell contact antigen → helper T cell is activated → clonal selection occurs

  2. body cell becomes infected with a virus → new viral proteins appear → class I MHC molecule-antigen complex displayed on cell surface

  3. self-tolerance of immune cells → B cells contact antigen → cytokines released

  4. complement is secreted → B cell contacts antigen → helper T cell activated → cytokines released

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TLS Online TPP Program

#Question id: 14693

#Section 1: Engineering Mathematics

Two sisters A and B appeared for an Audition. The probability of selection of A is 1/5 and that of B is 2/7. The probability that both of them are selected is

TLS Online TPP Program

#Question id: 14694

#Section 1: Engineering Mathematics

Two balls are to be drawn from a bag containing 5 red and 7 white balls. Find the chance that they will both be white

TLS Online TPP Program

#Question id: 14695

#Section 1: Engineering Mathematics

From a bag containing 4 white and 5 black balls a man draws 3 at random. Then the probability that all 3 are black is

TLS Online TPP Program

#Question id: 14696

#Section 1: Engineering Mathematics

Urn A contains 6 red and 4 black balls and urn B contains 4 red and 6 black balls, one ball is drawn at random from urn A and placed in urn B. Then one ball drawn at random from urn B and placed in urn A. If one ball is now drawn from urn A, the probability that it is found to be red is

TLS Online TPP Program

#Question id: 14697

#Section 1: Engineering Mathematics

Two persons each make a single throw with a dice. The probability they get equal value is P1. Four persons each make a single throw and probability of three being equal is P2. Then

TLS Online TPP Program

#Question id: 14698

#Section 1: Engineering Mathematics

A bag has 13 red, 14 green and 15 black balls. The probability of getting exactly 2 blacks on pulling out 4 balls is P1. Now the number of each colour ball is doubled and 8 balls are pulled out.The probability of getting exactly 4 blacks is P2. Then