Practice Questions

TLS Online TPP Program

#Question id: 801

Identify the type of DNA from the structures given below and match the correct form with its characteristics described.

#SCPH05 I Biotechnology

(ii) – The more compact A form of DNA has 11 bp per turn and shows a large tilt of the base pairs with respect to the helix axis.
(i) – The B form, which is observed at high humidity, most closely corresponds to the average structure of DNA under physiological conditions.
(iii) – Z DNA is a left-handed helix and has a zigzag (hence “Z”) appearance and has an anti-conformation of glycosyl bond.
(i) – The A form which is observed under low humidity has a structure similar to the structure that RNA adopts when double-helical.

More Questions

TLS Online TPP Program

#Question id: 1403

#SCPH06 I Botany

Tumor-suppressor genes encode proteins with which of the following functions?

a. growth-promoting b. growth-arresting c. pro-apoptotic

d. anti-apoptotic e. DNA repair

TLS Online TPP Program

#Question id: 14116

#SCPH05 I Biotechnology

Which of the following statements are CORRECT when a protein sequence database is searched using the BLAST algorithm?

P. A larger E-value indicates higher sequence similarity

Q. E-value < 10^-10 indicates sequence homology

R. A higher BLAST score indicates higher sequence similarity

S. E-value > 10^10 indicates sequence homology

TLS Online TPP Program

#Question id: 1628

#I Life Science/ Life Sciences Group – I-V

The classical and alternative pathways meet at complement component:

TLS Online TPP Program

#Question id: 9184

#SCPH06 I Botany

Which aquatic biome listed here is one of the most productive on Earth, and why?

TLS Online TPP Program

#Question id: 5240

#SCPH05 I Biotechnology

If bacteria grow in the presence of a large amount of DNase, which of the following recombination process completely inhibited?