e -DNA is formed from m-RNA by which enzyme:
restriction endonuclease
reverse transcriptase
DNA polymerase
RNA polymerase
B.
reverse transcriptase
C-DNA or complementary DNA is formed from m-RNA by the enzyme reverse transcriptase and the process of formation of C-DNA on the template of m-RNA is called C-DNA. It is formed through reverse transcription and is shorter than the actual or in- vivo gene because of the absence of introns and other non-coding regions.
On high mountains, difficulty in breathing is due to :
decrease in partial pressure of O2
decrease in amount of O2
increase in CO2 conc
all of the above
Example of Analogous organs is :
wings of bird and insect
forelimbs of horse and man
teeth of elephant and man
none of the above
'Convergent Evolution' is shown by :
homologous organs
analogous organs
vestigial organs
above three
Set which includes only analogous organs is :
wings of butterfly, housefly and bat
hindlegs of horse, grasshopper and bat
wings of btterfly and Wingspread of bat and birds
mandibles of cockrach, mosquito and honey bee
Mutation is more common when it is present in:
dominant condition
recessive condition
constant in population
none of the above
