Exp:B Nucleolus described by F. Fontana. It is a non-membrane bound structure which disappears in late prophase \& reappears in Telophase stage of cell division. Each nucleolus is produced by a Nucleolar organizing Region [NOR] of a chromosome.
JIPMER-2011 / AIPMT-1992
Cell : Structure and Functions
169579
Within the nucleus, DNA is organized along with proteins into material called :
1 nuclear lamina
2 chromatin
3 chromosome
4 chromatid
Explanation:
Exp:B Chromatin is the suspended material of nucleoplasm. It is the interphase chromosomal material, complex between eukaryotic DNA and protein. Protein of chromatin containing high proportion of basic amino acids and facilitate binding with DNA.
Punjab MET-2005
Cell : Structure and Functions
169580
Which of the following features is/are correct for heterochromatin of eukaryotic nucleus?
1 It is highly expanded in interphase
2 It stains densely with basic dyes
3 It is highly condensed in interphase
4 Both B and C
Explanation:
Exp:D In 1928, E. Heitz coined the term euchromatin and Heterochomatin to describe the parts of chromatin that are less coiled and those remain highly coiled condensed. In a typical nucleus. Some regtion of chromatin are loosely packed (and stains light) are referred to as euchromatin. The chromatin that is more densely packed and stains dark are called as Heterochromatin. Euchromatin is said to be transcriptionally active chromatin, whereas
WB JEE-2015
Cell : Structure and Functions
169564
Lampbrush chromosomes are seen in:
1 interphase
2 zygotene
3 diplotene
4 metaphase
Explanation:
Exp:C Lampbrush chromosomes was first observed by flemming in 1882 in amphibian oocytes. It develops during diplotene stage of meiotic prophase during oogenesis in oocytes of all vertebrates as well as invertebrates. These are meiotic bivalent, consisting of 2 pairs of sister chromatids held together by chiasmata. Due to pair of loops these chromosomes appears like lampbrush and hence called lampbrush chromosomes.
JCECE-2014
Cell : Structure and Functions
169565
One key function of nuclear pores is to
1 aid in the production of new nuclei
2 allow cells to communicate with each other
3 form connections between different organelles
4 allow molecules like protein to move in and out of the nucleus
Explanation:
Exp:D Bidirectional transport of molecules occurs through nuclear pore between cytosol and nucleus. RNA molecules and ribosomal subunits are exported to cytosol while all proteins that functions in nucleus are synthesized in cytosol and then imported. Proteins imported to or exported to nucleus through nuclear pores contains specific amino acid sequence that acts as "Nuclear locolization signals"
Exp:B Nucleolus described by F. Fontana. It is a non-membrane bound structure which disappears in late prophase \& reappears in Telophase stage of cell division. Each nucleolus is produced by a Nucleolar organizing Region [NOR] of a chromosome.
JIPMER-2011 / AIPMT-1992
Cell : Structure and Functions
169579
Within the nucleus, DNA is organized along with proteins into material called :
1 nuclear lamina
2 chromatin
3 chromosome
4 chromatid
Explanation:
Exp:B Chromatin is the suspended material of nucleoplasm. It is the interphase chromosomal material, complex between eukaryotic DNA and protein. Protein of chromatin containing high proportion of basic amino acids and facilitate binding with DNA.
Punjab MET-2005
Cell : Structure and Functions
169580
Which of the following features is/are correct for heterochromatin of eukaryotic nucleus?
1 It is highly expanded in interphase
2 It stains densely with basic dyes
3 It is highly condensed in interphase
4 Both B and C
Explanation:
Exp:D In 1928, E. Heitz coined the term euchromatin and Heterochomatin to describe the parts of chromatin that are less coiled and those remain highly coiled condensed. In a typical nucleus. Some regtion of chromatin are loosely packed (and stains light) are referred to as euchromatin. The chromatin that is more densely packed and stains dark are called as Heterochromatin. Euchromatin is said to be transcriptionally active chromatin, whereas
WB JEE-2015
Cell : Structure and Functions
169564
Lampbrush chromosomes are seen in:
1 interphase
2 zygotene
3 diplotene
4 metaphase
Explanation:
Exp:C Lampbrush chromosomes was first observed by flemming in 1882 in amphibian oocytes. It develops during diplotene stage of meiotic prophase during oogenesis in oocytes of all vertebrates as well as invertebrates. These are meiotic bivalent, consisting of 2 pairs of sister chromatids held together by chiasmata. Due to pair of loops these chromosomes appears like lampbrush and hence called lampbrush chromosomes.
JCECE-2014
Cell : Structure and Functions
169565
One key function of nuclear pores is to
1 aid in the production of new nuclei
2 allow cells to communicate with each other
3 form connections between different organelles
4 allow molecules like protein to move in and out of the nucleus
Explanation:
Exp:D Bidirectional transport of molecules occurs through nuclear pore between cytosol and nucleus. RNA molecules and ribosomal subunits are exported to cytosol while all proteins that functions in nucleus are synthesized in cytosol and then imported. Proteins imported to or exported to nucleus through nuclear pores contains specific amino acid sequence that acts as "Nuclear locolization signals"
NEET Test Series from KOTA - 10 Papers In MS WORD
WhatsApp Here
Cell : Structure and Functions
169578
Membrane is absent in
1 nucleus
2 nucleolus
3 vaculoe
4 lysosome
Explanation:
Exp:B Nucleolus described by F. Fontana. It is a non-membrane bound structure which disappears in late prophase \& reappears in Telophase stage of cell division. Each nucleolus is produced by a Nucleolar organizing Region [NOR] of a chromosome.
JIPMER-2011 / AIPMT-1992
Cell : Structure and Functions
169579
Within the nucleus, DNA is organized along with proteins into material called :
1 nuclear lamina
2 chromatin
3 chromosome
4 chromatid
Explanation:
Exp:B Chromatin is the suspended material of nucleoplasm. It is the interphase chromosomal material, complex between eukaryotic DNA and protein. Protein of chromatin containing high proportion of basic amino acids and facilitate binding with DNA.
Punjab MET-2005
Cell : Structure and Functions
169580
Which of the following features is/are correct for heterochromatin of eukaryotic nucleus?
1 It is highly expanded in interphase
2 It stains densely with basic dyes
3 It is highly condensed in interphase
4 Both B and C
Explanation:
Exp:D In 1928, E. Heitz coined the term euchromatin and Heterochomatin to describe the parts of chromatin that are less coiled and those remain highly coiled condensed. In a typical nucleus. Some regtion of chromatin are loosely packed (and stains light) are referred to as euchromatin. The chromatin that is more densely packed and stains dark are called as Heterochromatin. Euchromatin is said to be transcriptionally active chromatin, whereas
WB JEE-2015
Cell : Structure and Functions
169564
Lampbrush chromosomes are seen in:
1 interphase
2 zygotene
3 diplotene
4 metaphase
Explanation:
Exp:C Lampbrush chromosomes was first observed by flemming in 1882 in amphibian oocytes. It develops during diplotene stage of meiotic prophase during oogenesis in oocytes of all vertebrates as well as invertebrates. These are meiotic bivalent, consisting of 2 pairs of sister chromatids held together by chiasmata. Due to pair of loops these chromosomes appears like lampbrush and hence called lampbrush chromosomes.
JCECE-2014
Cell : Structure and Functions
169565
One key function of nuclear pores is to
1 aid in the production of new nuclei
2 allow cells to communicate with each other
3 form connections between different organelles
4 allow molecules like protein to move in and out of the nucleus
Explanation:
Exp:D Bidirectional transport of molecules occurs through nuclear pore between cytosol and nucleus. RNA molecules and ribosomal subunits are exported to cytosol while all proteins that functions in nucleus are synthesized in cytosol and then imported. Proteins imported to or exported to nucleus through nuclear pores contains specific amino acid sequence that acts as "Nuclear locolization signals"
Exp:B Nucleolus described by F. Fontana. It is a non-membrane bound structure which disappears in late prophase \& reappears in Telophase stage of cell division. Each nucleolus is produced by a Nucleolar organizing Region [NOR] of a chromosome.
JIPMER-2011 / AIPMT-1992
Cell : Structure and Functions
169579
Within the nucleus, DNA is organized along with proteins into material called :
1 nuclear lamina
2 chromatin
3 chromosome
4 chromatid
Explanation:
Exp:B Chromatin is the suspended material of nucleoplasm. It is the interphase chromosomal material, complex between eukaryotic DNA and protein. Protein of chromatin containing high proportion of basic amino acids and facilitate binding with DNA.
Punjab MET-2005
Cell : Structure and Functions
169580
Which of the following features is/are correct for heterochromatin of eukaryotic nucleus?
1 It is highly expanded in interphase
2 It stains densely with basic dyes
3 It is highly condensed in interphase
4 Both B and C
Explanation:
Exp:D In 1928, E. Heitz coined the term euchromatin and Heterochomatin to describe the parts of chromatin that are less coiled and those remain highly coiled condensed. In a typical nucleus. Some regtion of chromatin are loosely packed (and stains light) are referred to as euchromatin. The chromatin that is more densely packed and stains dark are called as Heterochromatin. Euchromatin is said to be transcriptionally active chromatin, whereas
WB JEE-2015
Cell : Structure and Functions
169564
Lampbrush chromosomes are seen in:
1 interphase
2 zygotene
3 diplotene
4 metaphase
Explanation:
Exp:C Lampbrush chromosomes was first observed by flemming in 1882 in amphibian oocytes. It develops during diplotene stage of meiotic prophase during oogenesis in oocytes of all vertebrates as well as invertebrates. These are meiotic bivalent, consisting of 2 pairs of sister chromatids held together by chiasmata. Due to pair of loops these chromosomes appears like lampbrush and hence called lampbrush chromosomes.
JCECE-2014
Cell : Structure and Functions
169565
One key function of nuclear pores is to
1 aid in the production of new nuclei
2 allow cells to communicate with each other
3 form connections between different organelles
4 allow molecules like protein to move in and out of the nucleus
Explanation:
Exp:D Bidirectional transport of molecules occurs through nuclear pore between cytosol and nucleus. RNA molecules and ribosomal subunits are exported to cytosol while all proteins that functions in nucleus are synthesized in cytosol and then imported. Proteins imported to or exported to nucleus through nuclear pores contains specific amino acid sequence that acts as "Nuclear locolization signals"
Exp:B Nucleolus described by F. Fontana. It is a non-membrane bound structure which disappears in late prophase \& reappears in Telophase stage of cell division. Each nucleolus is produced by a Nucleolar organizing Region [NOR] of a chromosome.
JIPMER-2011 / AIPMT-1992
Cell : Structure and Functions
169579
Within the nucleus, DNA is organized along with proteins into material called :
1 nuclear lamina
2 chromatin
3 chromosome
4 chromatid
Explanation:
Exp:B Chromatin is the suspended material of nucleoplasm. It is the interphase chromosomal material, complex between eukaryotic DNA and protein. Protein of chromatin containing high proportion of basic amino acids and facilitate binding with DNA.
Punjab MET-2005
Cell : Structure and Functions
169580
Which of the following features is/are correct for heterochromatin of eukaryotic nucleus?
1 It is highly expanded in interphase
2 It stains densely with basic dyes
3 It is highly condensed in interphase
4 Both B and C
Explanation:
Exp:D In 1928, E. Heitz coined the term euchromatin and Heterochomatin to describe the parts of chromatin that are less coiled and those remain highly coiled condensed. In a typical nucleus. Some regtion of chromatin are loosely packed (and stains light) are referred to as euchromatin. The chromatin that is more densely packed and stains dark are called as Heterochromatin. Euchromatin is said to be transcriptionally active chromatin, whereas
WB JEE-2015
Cell : Structure and Functions
169564
Lampbrush chromosomes are seen in:
1 interphase
2 zygotene
3 diplotene
4 metaphase
Explanation:
Exp:C Lampbrush chromosomes was first observed by flemming in 1882 in amphibian oocytes. It develops during diplotene stage of meiotic prophase during oogenesis in oocytes of all vertebrates as well as invertebrates. These are meiotic bivalent, consisting of 2 pairs of sister chromatids held together by chiasmata. Due to pair of loops these chromosomes appears like lampbrush and hence called lampbrush chromosomes.
JCECE-2014
Cell : Structure and Functions
169565
One key function of nuclear pores is to
1 aid in the production of new nuclei
2 allow cells to communicate with each other
3 form connections between different organelles
4 allow molecules like protein to move in and out of the nucleus
Explanation:
Exp:D Bidirectional transport of molecules occurs through nuclear pore between cytosol and nucleus. RNA molecules and ribosomal subunits are exported to cytosol while all proteins that functions in nucleus are synthesized in cytosol and then imported. Proteins imported to or exported to nucleus through nuclear pores contains specific amino acid sequence that acts as "Nuclear locolization signals"