Ribosomes are the granular structures first observed under the electron microscope as dense particles by George Palade (1953). They are composed of ribonucleic acid (RNA) and proteins and are not surrounded by any membrane. Palade granules are ribosomes.
BIOXI08: CELL-THE UNIT OF LIFE
335399
In both 70s and 80s ribosomes “s” stands for
1 Sedimentation co-efficient
2 Svedberg’s unit
3 Both a and b
4 None of these
Explanation:
The eukaryotic ribosomes are 80s while prokaryotic ribosomes are 70s; here s (Svedberg unit) stands for Sedimentation coefficient.
BIOXI08: CELL-THE UNIT OF LIFE
335400
Select one which is not true for ribosome
1 Made of two sub units
2 Form polysome
3 May attach to mRNA
4 Have no role in protein synthesis
Explanation:
Ribosome are responsible for protein synthesis
NCERT Exemplar
BIOXI08: CELL-THE UNIT OF LIFE
335401
Statement A : Ribosomes are composed of deoxy ribonucleic acid and proteins. Statement B : Ribosomes are surrounded by membrane.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Ribosomes are composed of ribonucleic acid and proteins. Ribosomes are not surrounded by membrane.
Ribosomes are the granular structures first observed under the electron microscope as dense particles by George Palade (1953). They are composed of ribonucleic acid (RNA) and proteins and are not surrounded by any membrane. Palade granules are ribosomes.
BIOXI08: CELL-THE UNIT OF LIFE
335399
In both 70s and 80s ribosomes “s” stands for
1 Sedimentation co-efficient
2 Svedberg’s unit
3 Both a and b
4 None of these
Explanation:
The eukaryotic ribosomes are 80s while prokaryotic ribosomes are 70s; here s (Svedberg unit) stands for Sedimentation coefficient.
BIOXI08: CELL-THE UNIT OF LIFE
335400
Select one which is not true for ribosome
1 Made of two sub units
2 Form polysome
3 May attach to mRNA
4 Have no role in protein synthesis
Explanation:
Ribosome are responsible for protein synthesis
NCERT Exemplar
BIOXI08: CELL-THE UNIT OF LIFE
335401
Statement A : Ribosomes are composed of deoxy ribonucleic acid and proteins. Statement B : Ribosomes are surrounded by membrane.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Ribosomes are composed of ribonucleic acid and proteins. Ribosomes are not surrounded by membrane.
Ribosomes are the granular structures first observed under the electron microscope as dense particles by George Palade (1953). They are composed of ribonucleic acid (RNA) and proteins and are not surrounded by any membrane. Palade granules are ribosomes.
BIOXI08: CELL-THE UNIT OF LIFE
335399
In both 70s and 80s ribosomes “s” stands for
1 Sedimentation co-efficient
2 Svedberg’s unit
3 Both a and b
4 None of these
Explanation:
The eukaryotic ribosomes are 80s while prokaryotic ribosomes are 70s; here s (Svedberg unit) stands for Sedimentation coefficient.
BIOXI08: CELL-THE UNIT OF LIFE
335400
Select one which is not true for ribosome
1 Made of two sub units
2 Form polysome
3 May attach to mRNA
4 Have no role in protein synthesis
Explanation:
Ribosome are responsible for protein synthesis
NCERT Exemplar
BIOXI08: CELL-THE UNIT OF LIFE
335401
Statement A : Ribosomes are composed of deoxy ribonucleic acid and proteins. Statement B : Ribosomes are surrounded by membrane.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Ribosomes are composed of ribonucleic acid and proteins. Ribosomes are not surrounded by membrane.
Ribosomes are the granular structures first observed under the electron microscope as dense particles by George Palade (1953). They are composed of ribonucleic acid (RNA) and proteins and are not surrounded by any membrane. Palade granules are ribosomes.
BIOXI08: CELL-THE UNIT OF LIFE
335399
In both 70s and 80s ribosomes “s” stands for
1 Sedimentation co-efficient
2 Svedberg’s unit
3 Both a and b
4 None of these
Explanation:
The eukaryotic ribosomes are 80s while prokaryotic ribosomes are 70s; here s (Svedberg unit) stands for Sedimentation coefficient.
BIOXI08: CELL-THE UNIT OF LIFE
335400
Select one which is not true for ribosome
1 Made of two sub units
2 Form polysome
3 May attach to mRNA
4 Have no role in protein synthesis
Explanation:
Ribosome are responsible for protein synthesis
NCERT Exemplar
BIOXI08: CELL-THE UNIT OF LIFE
335401
Statement A : Ribosomes are composed of deoxy ribonucleic acid and proteins. Statement B : Ribosomes are surrounded by membrane.
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both Statements are correct.
4 Both Statements are incorrect.
Explanation:
Ribosomes are composed of ribonucleic acid and proteins. Ribosomes are not surrounded by membrane.
