MCQ
Amniocentesis involves the analysis of :
- AAmnion
- BAmino acids of protein
- ✓Amniotic fluid
- DBoth (a) and (b)
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$(A)$ The earliest organisms that appeared on the earth were nongreen and presumably anaerobes.
$(B)$ The first autotrophic organisms were the chemoautotrophs that never released oxygen.Of the above statements which one of the following options is correct?
Statement $I:$
Restriction endonucleases recognise specific sequence to cut DNA known as palindromic nucleotide sequence.
Statement $II:$
Restriction endonucleases cut the $DNA$ strand a little away from the centre of the palindromic site.
In the light of the above statements, choose the most
appropriate answer from the options given below :