MCQ
Which of the following is not a macronutrient.
- AIron.
- BCalcium.
- ✓Manganese.
- DPhosphorus.
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| Column $I$ | Column $II$ | ||
| $A$ | Chromosomes are moved to spindle equator |
$I$ | Pachytene |
| $B$ | Centromere splits and chromatids move apart |
$II$ | Zygotene |
| $C$ | Pairing between homologous chromosomes takes place |
$III$ | Anaphase |
| $D$ | Crossing between homologous chromosomes |
$IV$ | Metaphase |
$I.$ Each myosin is a polymerized protein
$II.$ Many meromyosin constitutes one thick filament (myosin)
$III.$ Each meromyosin's tail is called heavy meromyosin $(HMM)$ and head is called light meromyosin $(LMM)$
$IV.$ The globular head is an active $ATP$ ase enzyme and has binding sites for $ATP$ and active sites for actin
Choose the option with correct statements
$a$. Large and more numerous nucleoli are present in cells actively carrying out protein synthesis.
$b$. Nuclear pores allow bidirectional movement of molecules.
$c$. Cytoskeleton is a glycolipid structure for mechanical support, motility and maintenance of the shape of the cell.
$d$. Steroidal hormones are synthesized by Golgi complex.
| Excretory structure$/$ organ | Animals | ||
| $A$ | Protonephridia | $i.$ | Prawn |
| $B$ | Nephridia | $ii.$ | Cockroach |
| $C$ | Malpighian tubules | $iii.$ | Earthworm |
| $D$ | Green gland or Antennal gland | $iv.$ | Flatworms |