میں کرومیٹن کا جینیاتی مواد؟ ______
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A. None of these
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B. RNA
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C. Protein
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D. DNA
Explanation
- Chromatin is composed of DNA.
- It is wrapped around histone proteins.
- It is the form in which genetic material is stored in the nucleus of eukaryotic cells.
جانوروں کے خلیے میں مائٹوسس کے پروفیز کے دوران کون سا عمل ہوتا ہے؟
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A. Division of centromeres
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B. Separation of centrioles
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C. Replication of DNA
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D. Formation of chromosomes
Explanation
- During prophase of mitosis in an animal cell, separation of centrioles occurs.
- The centrioles move to opposite poles of the cell to help organize the mitotic spindle.
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A. Chromosomes include a long molecule of DNA divided into sections called genes
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B. Genes include long DNA molecules called chromosomes
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C. Chromosomes are long DNA molecules divided into sections called genes
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D. Chromosomes include genes which are divided into sections called DNA molecules
Explanation
A chromosome is a long, thread-like structure made up of DNA, and within that DNA are smaller segments called genes.
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A. DNA and RNA
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B. DNA and protein
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C. RNA and proteins
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D. RNA and lipids
Explanation
A chromosome is typically made up of DNA and proteins, particularly histones, which help in the packaging of DNA.
نیوکلئس ______ کی موجودگی کی وجہ سے رنگ لیتا ہے؟
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A. Lipid
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B. Metal ions
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C. Chromatin
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D. Thylakoids
Explanation
The nucleus takes dyes due to the presence of chromatin.
It is a complex of DNA and proteins that make up the chromosome.
Chromatin is responsible for staining with basic dyes, such as hematoxylin and eosin.
They are commonly used in histology and cytology to visualize cell nuclei.
Chromatin is composed of:
- DNA (the genetic material)
- Histone proteins (which form a structure called a nucleosome)
- Non-histone proteins (which regulate gene expression and chromatin structure)
کروموسوم کس خلیے کے مرحلے پر نظر آتے ہیں؟
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A. Prometaphase
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B. Telophase
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C. None of these
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D. Anaphase
Explanation
- Chromosomes become distinctly visible as condensed structures during prometaphase in mitosis.
- This stage follows prophase, and the nuclear envelope begins to break down.
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