Practice Questions

TLS Online TPP Program

#Question id: 71

Which of the following is not the priority rule for R, S Configuration?

#Section 2: General Biology

If the four atoms attached to the chiral center are all different, priority depends on atomic number, with the atom of lower atomic number getting lower priority.
If the two atoms attached to chiral centers are same, the atoms attached to each of these first atoms are compared
When there is a double bond or triple bond, both atoms are considered to be duplicated or triplicated
If the four atoms attached to the chiral center are all different, priority depends on atomic number, with the atom of higher atomic number getting lower priority.

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TLS Online TPP Program

#Question id: 3635

#Section 3: Genetics, Cellular and Molecular Biology

In the multiple allele series that determines coat color in rabbits, c+codes for agouti, cch for chinchilla and ch for Himalayan. Dominance is in the order c+>cch>ch. In a cross of c+/cch X cch/ch, what proportion of progeny will be chinchilla?

TLS Online TPP Program

#Question id: 12936

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

Adding small double-stranded molecules with one internal site for a restriction endonuclease,termed ______ to cDNA.

TLS Online TPP Program

#Question id: 15562

#Section 6: Plant, Animal and Microbial Biotechnology

Deletion of which gene not only was accompanied by the abolition of antibiotic formation but also severely impaired growth on agar media.

TLS Online TPP Program

#Question id: 2079

#Section 3: Genetics, Cellular and Molecular Biology

According to the fluid mosaic model of membrane structure, proteins of the membrane are mostly