TLS Online TPP Program

#Question id: 1972


Clonal selection implies that

#Unit 4. Cell Communication and Cell Signaling
  1. brothers and sisters have similar immune responses.

  2. antigens increase mitosis in specific lymphocytes.

  3. only certain cells can produce interferon.

  4. a B cell has multiple types of antigen receptors.

More Questions
TLS Online TPP Program

#Question id: 4718

#Unit 2. Cellular Organization

All the following statements about destruction of cyclins are true, except:

TLS Online TPP Program

#Question id: 19923

#Unit 12. Applied Biology

Promoter prpl-1 specifies the expression of barnase gene in such cells 1that are 

TLS Online TPP Program

#Question id: 27389

#Unit 1. Molecules and their Interaction Relevant to Biology

The of the tendency of an atom to attract a bonding pair of electrons is known as

TLS Online TPP Program

#Question id: 5725

#Unit 8. Inheritance Biology

An individual is having an inversion in heterozygous condition. The regions on normal chromosome are marked as A, B, C, D, E, F, G while the chromosome having inversion has the regions as a, b, e, d, c, f, g. The diagram given below shows pairing of these two homologous chromosomes during meiosis and the site of a crossing over is indicated:

The following statements are given to describe the inversion and the consequence of crossing over shown in the above diagram:

A. This is a paracentric inversion

B. This will generate a dicentric and an acentric chromosome following separation of chromosomes after crossing over

C. This will generate two recombinant chromosomes with deletion and other parental chrmosome following separation of chromosomes after crossing over

D. 50 % gametes will be non viable due to deletion or duplication of chromatids

E. The gametes having recombinant chromatid or parental inversion chromatids will be non-viable

TLS Online TPP Program

#Question id: 4815

#Unit 8. Inheritance Biology

The cross over percentage between linked genes J and M is 20%, J and L is 35%, J and N is 70%, L and K is 15%, M and N 50%. The sequence of genes on the chromosome is