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9.Biotechnology Principals and Process
medium
Study the given figure carefully and select the correct statements regarding this
$I.$ It represents typical agarose gel electrophoresis which showing differential migration of $DNA$ fragments
$II.$ Lane $1$ contains undigested $DNA$ fragments
$III.$ Lanes $2$ to $4$ contains digested $DNA$ fragment
$IV.$ Smallest $DNA$ bands are present at ( $A$ ) position and largest $DNA$ bands are present at ( $B$ ) position

A
$I, II\; and \;III$
B
$I, II\; and \;IV$
C
$II\; and \;III$
D
$III\; and\; IV$
Solution
Largest $DNA$ bands will be at $(A)$ and smallest $DNA$ bands will be at $(B)$ because in this $DNA$ is move according to their size in agarose small $DNA$ fragment will have small resistant so this fragment move to long distance as compared to large $DNA$ fragment
Standard 12
Biology