MCQ
Which of the following is a correctly matched pair?
- AWhite blood cell $-$ No nucleus.
- BSmooth muscle cell $-$ Multinucleated.
- CSmooth muscle $-$ Voluntary action.
- ✓Cardiac muscle $-$ Involuntary action.
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$A$. Mitochondria $B$. Endoplasmic reticulum $C$. Chloroplasts
$D$. Golgi complex $E$. Peroxisomes
Choose the most appropriate answer from the options given below:
| Column $I$ | Column $II$ | ||
| $A$ | Proximal convoluted tubule | $i.$ | Formation of concentrated urine |
| $B$ | Distal convoluted tubule | $ii.$ | Formation blood |
| $C$ | Henle’s loop | $iii.$ | Reabsorption of $70-80\%$ of electrolytes |
| $D$ | Counter$-$current mechanism | $iv.$ | Ionic balance |
| $E$ | Renal corpuscle medulla | $v.$ | Maintenance of concentration gradient in |
$R-$ During meiosis the genetic material is replicated twice and cell divides twice.
