हिंदी

A structure not present in all chromosomes is ______.

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प्रश्न

A structure not present in all chromosomes is ______.

विकल्प

  • centromere

  • chromonemata

  • secondary constriction

  • telomere

MCQ
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उत्तर

A structure not present in all chromosomes is secondary constriction.

Explanation:

Structures like the centromere, chromonemata, and telomeres are essential components found in all functional chromosomes for stability and replication. In contrast, secondary constrictions are only present on specific chromosomes at fixed locations, where they often function as nucleolar organiser regions (NORs). Chromosomes containing this distinct structure are known as satellite chromosomes (or SAT-chromosomes).
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अध्याय 2: Structure of Chromosomes - Exercises [पृष्ठ २१]

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फ्रैंक Biology Part 2 [English] Class 10 ICSE
अध्याय 2 Structure of Chromosomes
Exercises | Q 1. (c) | पृष्ठ २१
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