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STD 11 - 8. Cell the unit of life — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 8. Cell the unit of life1 Mark
MCQ
The following diagram represents a structure chromosome. Identify the structures marked as $A , B$ and $C .$
  • A
    $A-$ Satellite, $B -$ Primary constriction, $C -$ Acrocentric
  • ✓
    $A -$ Satellite, $B -$ Secondary constriction, $C -$ Metacentric
  • C
    $A-$ Satellite, $B -$ Centromere, $C -$ Telocentric
  • D
    $A -$ Satellite, $B -$ Centromere, $C -$ Submetacentric
✓

Answer

Correct option: B.
$A -$ Satellite, $B -$ Secondary constriction, $C -$ Metacentric
b
The figure shows the structure of metacentric $(C)$ chromosomes. The parts marked as $A$ and $B$ are respectively are satellite and secondary constriction. Metacentric chromosomes have the centromere in the centre, due to which both sections are of equal

length. Human chromosome $1$ and $3$ are metacentric.

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