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TLS Online TPP Program

#Question id: 762

Regarding the sugar residues in nucleic acids, which, if any, of the following statements is incorrect?

#SCPH28 | Zoology

  1. The sugar is always based on a heterocyclic ring that consists of one oxygen atom and four carbon atoms, one of which is connected to a fifth carbon atom, the 5’ carbon atom.

  2. The internal sugar residues in a DNA strand normally have free hydroxyl groups, unlike those in an RNA strand.

  3. Bases are covalently linked to the carbon 1’ atoms of the sugars.

  4. Neighboring sugar residues are linked to each other by a phosphodiester bond that connects the 3’ carbon atom on one sugar to the 5’ carbon atom of its neighbour.

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TLS Online TPP Program

#Question id: 17076

#SCPH06 I Botany

The various advantages of serum-free media could be
1. Improved reproducibility of results from different laboratories
2. Easier downstream processing of products from cultured cells
3. Biassays are free from interference due to serum proteins
4. They permit selective culture of diffrentiated cell types from the heterogeneous cultures
Which of the statements are true?
TLS Online TPP Program

#Question id: 17076

#SCPH28 | Zoology

The various advantages of serum-free media could be
1. Improved reproducibility of results from different laboratories
2. Easier downstream processing of products from cultured cells
3. Biassays are free from interference due to serum proteins
4. They permit selective culture of diffrentiated cell types from the heterogeneous cultures
Which of the statements are true?
TLS Online TPP Program

#Question id: 17077

#SCPH01 Biochemistry

Cells lacking Thymidine kinase if introduced into HAT medium which pathways will continue for nucleotide synthesis
TLS Online TPP Program

#Question id: 17077

#SCPH06 I Botany

Cells lacking Thymidine kinase if introduced into HAT medium which pathways will continue for nucleotide synthesis
TLS Online TPP Program

#Question id: 17077

#SCPH28 | Zoology

Cells lacking Thymidine kinase if introduced into HAT medium which pathways will continue for nucleotide synthesis
TLS Online TPP Program

#Question id: 17078

#SCPH01 Biochemistry

In HGPRT negative cells which pathway is blocked of nucleotide synthesis