Practice Questions

TLS Online TPP Program

#Question id: 762

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

#XL - Q Biochemistry

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.
The internal sugar residues in a DNA strand normally have free hydroxyl groups, unlike those in an RNA strand.
Bases are covalently linked to the carbon 1’ atoms of the sugars.
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: 8920

#XL - T Zoology

Almost all of the major animal body plans seen today appeared in the fossil record over 500 million years ago at the beginning of the

TLS Online TPP Program

#Question id: 20057

#XL - P Chemistry

Maximum how many numbers of hydrogen bond can be form by H2O molecule ?

TLS Online TPP Program

#Question id: 12737

#XL - S Microbiology

Name the technique which is used to detect abnormalities at an early stage.

TLS Online TPP Program

#Question id: 20222

#XL - P Chemistry

In which molecules / ion have not all the equal bonds ?

TLS Online TPP Program

#Question id: 1711

#XL - Q Biochemistry

On entering a germinal center, the primary B-blasts grow exponentially to form which cell type in the dark zone?