MCQ
Pithecanthropus erectus fossil was found in
- AChina
- BJapan
- ✓Java
- DTexas
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Reason : Zona pellucida remains undivided till cleavage is complete.
$I.$ Anabaena
$II.$ Oscillatoria
$III.$ Nostoc
Choose the correct option

| List $-I$ | List $-II$ |
| $a$ In lac operon $i$ gene codes for | $i$ transacetylase |
| $b$ In lac operon $z$ gene codes for | $ii$ permease |
| $c$ In lac operon $y$ gene codes for | $iii$ $\beta$ - galactosidase |
| $d$ In lac operon $a$ gene codes for | $iv$ Repressor |
Choose the correct answer from the options given below :