Chromosomal Landmarks Quiz
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Questions and Answers

Where are the nucleolar organizer regions (NORs) located in humans?

  • Centromeres of chromosomes 4, 8, and 12
  • Long arms of chromosomes 1, 6, and 18
  • Telomeres of chromosomes 3, 7, and 19
  • Short arms of chromosomes 13, 14, 15, 21, and 22 (correct)

What is the composition of each unit in the nucleolar organizer regions (NORs) in eukaryotes?

  • Four genes coding for 22S, 7.8S, and 25S ribosomal RNA
  • Three genes coding for 18S, 5.8S, and 28S ribosomal RNA (correct)
  • Two genes coding for 20S and 35S ribosomal RNA
  • Five genes coding for 16S, 6.8S, and 30S ribosomal RNA

Where are the 5S rDNA genes found in higher eukaryotes?

  • In the centromeres of chromosomes
  • On the long arms of chromosomes
  • On the telomeres of chromosomes
  • In clusters in regions distinct from the major unit rDNA repeats (correct)

What type of chromosomal landmarks are nucleolar organizer regions (NORs)?

<p>Chromosomal landmarks consisting of tandemly repeated sequences of ribosomal genes (C)</p> Signup and view all the answers

Which chromosomes have the NORs in humans?

<p>13, 14, 15, 21, and 22 (B)</p> Signup and view all the answers

মানুষের কোন ক্রোমোসোমে নিউক্লিওলার অর্গানাইজার রিজন (NORs) অবস্থিত?

<p>ক্রোমোসোম 13 (B)</p> Signup and view all the answers

নিউক্লিওলার অর্গানাইজার রিজন (NORs) এর কি বিশেষ উদ্দেশ্য আছে?

<p>Ribosomal RNA synthesis (D)</p> Signup and view all the answers

উচ্চ ইউকারিওটে কোন অঞ্চলে 5S rDNA জিন গুলি পাওয়া যায়?

<p>নিউক্লিওলার অর্গানাইজার রিজন (NORs) (A)</p> Signup and view all the answers

18S, 5.8S, 28S rRNA-র coding genes-এর প্রতিটি unit-ের composition হ'ল:

<p>$3$ genes (C)</p> Signup and view all the answers

POLYTENE CHROMOSOME-র কি বৈশিষ্ট্য?

<p>Multiple copies of the same chromosome attached together (C)</p> Signup and view all the answers

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