OnlineCBT Logo OnlineCBT

Biology · CELL CYCLE AND CELL DIVISION

हिन्दी

At which mitotic stage does the complete disappearance of the nuclear envelope occur, and what is the specific site for spindle fibre attachment on the chromosomes?

  1. Prophase; Telomeres located at the ends of chromatids
  2. Metaphase; Kinetochores located on the surface of centromeres
  3. Anaphase; Secondary constrictions of chromosomes
  4. Telophase; Recombination nodules on the chromatin

Correct answer · Option 2

Metaphase; Kinetochores located on the surface of centromeres

Explanation

The complete disintegration of the nuclear envelope marks the start of metaphase, where small disc-shaped structures called kinetochores on the surface of centromeres serve as sites of spindle attachment.
पता संपर्क करें

+91 7877547686

ई-मेल

onlinecbtportal@gmail.com

हेल्पलाइन नंबर

+91 7877547686


डाउनलोड करने के लिए क्लिक करें
Get it on Google Play

ऐप डाउनलोड करने
के लिए Google Play पर
उपलब्ध है

WhatsApp Chat