TLS Online TPP Program

#Question id: 27249


DNA tertiary structure, what is a histone octamer?

#Section 3: Genetics, Cellular and Molecular Biology
  1. A complex consisting of eight positively charged histone proteins (two of each H2A, H2B, H3 and H4) that aid in the packaging of DNA

  2. A complex consisting of eight negatively charged histone proteins (two of each H2A, H2B, H3 and H4) that aid in the packaging of DNA
  3. A complex consisting of nine positively charged histone proteins (H1 and two of each H2A, H2B, H3 and H4) that aid in the packaging of DNA.
  4. A complex consisting of nine negatively charged histone proteins (H1 and two of each H2A, H2B, H3 and H4) that aid in the packaging of DNA.

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TLS Online TPP Program

#Question id: 15699

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

The PROSITE pattern representing the conserved sequence motif for a new family of AMP binding protein is [LIVMFY]-X(2)-[STG]-[STAG]-G-[ST]. You are given a sequence of a 15-amino acid stretch starting from the first residue of the motif. Which one of the following proteins is likely to have AMP binding function?

TLS Online TPP Program

#Question id: 15700

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

In a sequence database of a given size, which of the following expressions is likely to retrieve more matches (X means any amino acid; any of the residues in square brackets can occupy that position)?

TLS Online TPP Program

#Question id: 15701

#Section 7: Recombinant DNA technology and Other Tools in Biotechnology

In a sequence logo of the type given below, the sizes of the letters are proportional to the:

TLS Online TPP Program

#Question id: 15702

#Section 6: Plant, Animal and Microbial Biotechnology

Following are few sterilization techniques and materials used in plant tissue culture. Identify the correct combinations.

TLS Online TPP Program

#Question id: 15703

#Section 6: Plant, Animal and Microbial Biotechnology

Most commonly used carbon source in nutrient medium for plant tissue culture is

TLS Online TPP Program

#Question id: 15715

#Section 6: Plant, Animal and Microbial Biotechnology

In embryogenesis a type of structure with no vascular connection with the maternal callus tissue or explants is formed