169420
The two subunits of ribosome remain united at a critical ion level of :
1 magnesium
2 calcium
3 copper
4 manganese
Explanation:
Exp:A The two subunits of ribosomes unite only during the process of translation. Magnesium ion is essential for binding the ribosome subunits. The value is 1 to 2 millimoles for eukaryotes and 0.5 millimoles for prokaryotes. The subunits separate below this concentration. Disintegration of ribosome units occurs at a magnesium ion value of 0.5 millimoles in eukaryotes and below 0.3 millimoles in prokaryotes. The ribosome form dimers when magnesium concentration is higher.
BHU PMT (Screening)-2010 AIPMT-2008
Cell : Structure and Functions
169422
A complex of ribosomes attached to a single strand of RNA is konwn as
1 OKazaki fragment
2 Polysome
3 Polymer
4 Polypeptide
Explanation:
Exp:B Single strand of ribosome on mRNA molecule during translation is known as Polysome. Polysomes are connected by a single molecule of mRNA that is being translated simultaneously by many closely spaced ribosomes. Polymers are large molecules composed of many monomer units. Polypeptide is large linear polymer of amino acids bonded together by peptide linkage. During DNA replication fragments present on lagging strand called Okazaki fragments.
NEET-2016 Phase-I
Cell : Structure and Functions
169425
In which cell orgenelles a lipoprotein covering is absent?
1 Ribosomes
2 Lysosomes
3 Mitochondria
4 Peroxisomes
Explanation:
Exp:A Ribosomes is one of the cell organelles in which lipoprotein covering is absents. It are large nonmembranous RNA protein complexes which are necessary for protein synthesis. These are dense granules of 150to 200 \(\mathrm{A}^{\mathrm{o}}\) diameters (as revealed by electron microspore) and found either in free state or attached to the outside of cytoplasmic membrane just like that of ER or nuclear membrane etc. through ribophorins. These are also called Palade particles as in animal cell first of all observed by Palade in 1955. In plant however these are reported two year early i.e in 1953 by Robinson and Brown in bean root.
UP CPMT-2006
Cell : Structure and Functions
169426
Ribosome may also be called
1 Microsome
2 Dictyosome
3 Ribonucleo protein
4 Oxysomes
Explanation:
Exp:C Ribosome is also called as Ribonucleoprotein. It is protein manufacturing naked granular nucleo protein organelles made up of rRNA and proteins. Oxysomes are found within mitochondria and are concerned with synthesis of ATP through oxidative phosphorylation. In plant cell and lower invertebrates Golgi complex called dictyosomes - Microsomes refer to cellular membrane which is recovered through differential centrifugation.
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Cell : Structure and Functions
169420
The two subunits of ribosome remain united at a critical ion level of :
1 magnesium
2 calcium
3 copper
4 manganese
Explanation:
Exp:A The two subunits of ribosomes unite only during the process of translation. Magnesium ion is essential for binding the ribosome subunits. The value is 1 to 2 millimoles for eukaryotes and 0.5 millimoles for prokaryotes. The subunits separate below this concentration. Disintegration of ribosome units occurs at a magnesium ion value of 0.5 millimoles in eukaryotes and below 0.3 millimoles in prokaryotes. The ribosome form dimers when magnesium concentration is higher.
BHU PMT (Screening)-2010 AIPMT-2008
Cell : Structure and Functions
169422
A complex of ribosomes attached to a single strand of RNA is konwn as
1 OKazaki fragment
2 Polysome
3 Polymer
4 Polypeptide
Explanation:
Exp:B Single strand of ribosome on mRNA molecule during translation is known as Polysome. Polysomes are connected by a single molecule of mRNA that is being translated simultaneously by many closely spaced ribosomes. Polymers are large molecules composed of many monomer units. Polypeptide is large linear polymer of amino acids bonded together by peptide linkage. During DNA replication fragments present on lagging strand called Okazaki fragments.
NEET-2016 Phase-I
Cell : Structure and Functions
169425
In which cell orgenelles a lipoprotein covering is absent?
1 Ribosomes
2 Lysosomes
3 Mitochondria
4 Peroxisomes
Explanation:
Exp:A Ribosomes is one of the cell organelles in which lipoprotein covering is absents. It are large nonmembranous RNA protein complexes which are necessary for protein synthesis. These are dense granules of 150to 200 \(\mathrm{A}^{\mathrm{o}}\) diameters (as revealed by electron microspore) and found either in free state or attached to the outside of cytoplasmic membrane just like that of ER or nuclear membrane etc. through ribophorins. These are also called Palade particles as in animal cell first of all observed by Palade in 1955. In plant however these are reported two year early i.e in 1953 by Robinson and Brown in bean root.
UP CPMT-2006
Cell : Structure and Functions
169426
Ribosome may also be called
1 Microsome
2 Dictyosome
3 Ribonucleo protein
4 Oxysomes
Explanation:
Exp:C Ribosome is also called as Ribonucleoprotein. It is protein manufacturing naked granular nucleo protein organelles made up of rRNA and proteins. Oxysomes are found within mitochondria and are concerned with synthesis of ATP through oxidative phosphorylation. In plant cell and lower invertebrates Golgi complex called dictyosomes - Microsomes refer to cellular membrane which is recovered through differential centrifugation.
169420
The two subunits of ribosome remain united at a critical ion level of :
1 magnesium
2 calcium
3 copper
4 manganese
Explanation:
Exp:A The two subunits of ribosomes unite only during the process of translation. Magnesium ion is essential for binding the ribosome subunits. The value is 1 to 2 millimoles for eukaryotes and 0.5 millimoles for prokaryotes. The subunits separate below this concentration. Disintegration of ribosome units occurs at a magnesium ion value of 0.5 millimoles in eukaryotes and below 0.3 millimoles in prokaryotes. The ribosome form dimers when magnesium concentration is higher.
BHU PMT (Screening)-2010 AIPMT-2008
Cell : Structure and Functions
169422
A complex of ribosomes attached to a single strand of RNA is konwn as
1 OKazaki fragment
2 Polysome
3 Polymer
4 Polypeptide
Explanation:
Exp:B Single strand of ribosome on mRNA molecule during translation is known as Polysome. Polysomes are connected by a single molecule of mRNA that is being translated simultaneously by many closely spaced ribosomes. Polymers are large molecules composed of many monomer units. Polypeptide is large linear polymer of amino acids bonded together by peptide linkage. During DNA replication fragments present on lagging strand called Okazaki fragments.
NEET-2016 Phase-I
Cell : Structure and Functions
169425
In which cell orgenelles a lipoprotein covering is absent?
1 Ribosomes
2 Lysosomes
3 Mitochondria
4 Peroxisomes
Explanation:
Exp:A Ribosomes is one of the cell organelles in which lipoprotein covering is absents. It are large nonmembranous RNA protein complexes which are necessary for protein synthesis. These are dense granules of 150to 200 \(\mathrm{A}^{\mathrm{o}}\) diameters (as revealed by electron microspore) and found either in free state or attached to the outside of cytoplasmic membrane just like that of ER or nuclear membrane etc. through ribophorins. These are also called Palade particles as in animal cell first of all observed by Palade in 1955. In plant however these are reported two year early i.e in 1953 by Robinson and Brown in bean root.
UP CPMT-2006
Cell : Structure and Functions
169426
Ribosome may also be called
1 Microsome
2 Dictyosome
3 Ribonucleo protein
4 Oxysomes
Explanation:
Exp:C Ribosome is also called as Ribonucleoprotein. It is protein manufacturing naked granular nucleo protein organelles made up of rRNA and proteins. Oxysomes are found within mitochondria and are concerned with synthesis of ATP through oxidative phosphorylation. In plant cell and lower invertebrates Golgi complex called dictyosomes - Microsomes refer to cellular membrane which is recovered through differential centrifugation.
169420
The two subunits of ribosome remain united at a critical ion level of :
1 magnesium
2 calcium
3 copper
4 manganese
Explanation:
Exp:A The two subunits of ribosomes unite only during the process of translation. Magnesium ion is essential for binding the ribosome subunits. The value is 1 to 2 millimoles for eukaryotes and 0.5 millimoles for prokaryotes. The subunits separate below this concentration. Disintegration of ribosome units occurs at a magnesium ion value of 0.5 millimoles in eukaryotes and below 0.3 millimoles in prokaryotes. The ribosome form dimers when magnesium concentration is higher.
BHU PMT (Screening)-2010 AIPMT-2008
Cell : Structure and Functions
169422
A complex of ribosomes attached to a single strand of RNA is konwn as
1 OKazaki fragment
2 Polysome
3 Polymer
4 Polypeptide
Explanation:
Exp:B Single strand of ribosome on mRNA molecule during translation is known as Polysome. Polysomes are connected by a single molecule of mRNA that is being translated simultaneously by many closely spaced ribosomes. Polymers are large molecules composed of many monomer units. Polypeptide is large linear polymer of amino acids bonded together by peptide linkage. During DNA replication fragments present on lagging strand called Okazaki fragments.
NEET-2016 Phase-I
Cell : Structure and Functions
169425
In which cell orgenelles a lipoprotein covering is absent?
1 Ribosomes
2 Lysosomes
3 Mitochondria
4 Peroxisomes
Explanation:
Exp:A Ribosomes is one of the cell organelles in which lipoprotein covering is absents. It are large nonmembranous RNA protein complexes which are necessary for protein synthesis. These are dense granules of 150to 200 \(\mathrm{A}^{\mathrm{o}}\) diameters (as revealed by electron microspore) and found either in free state or attached to the outside of cytoplasmic membrane just like that of ER or nuclear membrane etc. through ribophorins. These are also called Palade particles as in animal cell first of all observed by Palade in 1955. In plant however these are reported two year early i.e in 1953 by Robinson and Brown in bean root.
UP CPMT-2006
Cell : Structure and Functions
169426
Ribosome may also be called
1 Microsome
2 Dictyosome
3 Ribonucleo protein
4 Oxysomes
Explanation:
Exp:C Ribosome is also called as Ribonucleoprotein. It is protein manufacturing naked granular nucleo protein organelles made up of rRNA and proteins. Oxysomes are found within mitochondria and are concerned with synthesis of ATP through oxidative phosphorylation. In plant cell and lower invertebrates Golgi complex called dictyosomes - Microsomes refer to cellular membrane which is recovered through differential centrifugation.
