In prokaryotes the transcription of mRNA, rRNA and tRNA are by
(A) Different enzymes
(B) Same enzyme
(C) Different proteins
(D) More than one options correct

Diffusion rates are affected by : (a) Pressure (b) Temperature (c) Concentration gradient (d) More than one option is correct

The main cause of extinction of species from tropical area is : (a) Over - exploitation (b) Deforestation (c) Alien species invasion (d) More than one option is correct

Monozygotic twins develops from (a) Different zygotes (b) Different ova (c) Different sperms (d) Same zygote

Vernier constant is the (One or more than one correct option may be correct )

The coenzymes NAD^+ , FAD and NADP^+ are : (a) allosteric enzymes (b) metal ions (c) cofactors (d) both (a) and (c)

Infectious RNA particles without protein coat (a) Have high molecular weight (b) Were discovered by Alper (c) Known to cause disease in plants (d) More than one option is correct

DNA fingerprinting can be used (a) To solve cases of disputed paternity and maternity (b) For criminal identification and forensics (c) For personal identification (d) More than one option is correct.

Four vessels A, B, C and D have different shapes and hold different amount of water. Which of the following is correct.

Which of the following does not confer stability to the helical structure of DNA ? (a) Phosphodiester bond (b) H-bond (c) N-glycosidic linkage (d) More than one option is correct.

Select the correct option for A, B,C & D