Histones are basic proteins. They are found inside the nucleus of the eukaryotic cells. Their function is to package DNA into structural units called nucleosomes.
BIOXI08: CELL-THE UNIT OF LIFE
335125
Based on the position of centromere, the chromosomes are classified into how many types?
1 1
2 3
3 2
4 4
Explanation:
Based on the position of centromere, the chromosomes are classified into four types. The metacentric chromosome has middle centromere forming two equal arms of the chromosome. The sub-metacentric chromosome has centromere slightly away from the middle of the chromosome resulting into one shorter arm and one longer arm. In case of acrocentric chromosome the centromere is situated close to its end forming one extremely short and one very long arm, whereas the telocentric chromosome has a terminal centromere.
BIOXI08: CELL-THE UNIT OF LIFE
335126
Which of the following features is common to prokaryotes and eukaryotes?
1 DNA is genetic material
2 Cell wall present
3 Nuclear membrane present
4 Membrane-bound sub-cellular organelles present
Explanation:
Nuclear membrane and membrane bound organelles are absent in prokayrotes.
NCERT Exemplar
BIOXI08: CELL-THE UNIT OF LIFE
335127
In which part of the nucleus does ribosome is produced
Histones are basic proteins. They are found inside the nucleus of the eukaryotic cells. Their function is to package DNA into structural units called nucleosomes.
BIOXI08: CELL-THE UNIT OF LIFE
335125
Based on the position of centromere, the chromosomes are classified into how many types?
1 1
2 3
3 2
4 4
Explanation:
Based on the position of centromere, the chromosomes are classified into four types. The metacentric chromosome has middle centromere forming two equal arms of the chromosome. The sub-metacentric chromosome has centromere slightly away from the middle of the chromosome resulting into one shorter arm and one longer arm. In case of acrocentric chromosome the centromere is situated close to its end forming one extremely short and one very long arm, whereas the telocentric chromosome has a terminal centromere.
BIOXI08: CELL-THE UNIT OF LIFE
335126
Which of the following features is common to prokaryotes and eukaryotes?
1 DNA is genetic material
2 Cell wall present
3 Nuclear membrane present
4 Membrane-bound sub-cellular organelles present
Explanation:
Nuclear membrane and membrane bound organelles are absent in prokayrotes.
NCERT Exemplar
BIOXI08: CELL-THE UNIT OF LIFE
335127
In which part of the nucleus does ribosome is produced
Histones are basic proteins. They are found inside the nucleus of the eukaryotic cells. Their function is to package DNA into structural units called nucleosomes.
BIOXI08: CELL-THE UNIT OF LIFE
335125
Based on the position of centromere, the chromosomes are classified into how many types?
1 1
2 3
3 2
4 4
Explanation:
Based on the position of centromere, the chromosomes are classified into four types. The metacentric chromosome has middle centromere forming two equal arms of the chromosome. The sub-metacentric chromosome has centromere slightly away from the middle of the chromosome resulting into one shorter arm and one longer arm. In case of acrocentric chromosome the centromere is situated close to its end forming one extremely short and one very long arm, whereas the telocentric chromosome has a terminal centromere.
BIOXI08: CELL-THE UNIT OF LIFE
335126
Which of the following features is common to prokaryotes and eukaryotes?
1 DNA is genetic material
2 Cell wall present
3 Nuclear membrane present
4 Membrane-bound sub-cellular organelles present
Explanation:
Nuclear membrane and membrane bound organelles are absent in prokayrotes.
NCERT Exemplar
BIOXI08: CELL-THE UNIT OF LIFE
335127
In which part of the nucleus does ribosome is produced
Histones are basic proteins. They are found inside the nucleus of the eukaryotic cells. Their function is to package DNA into structural units called nucleosomes.
BIOXI08: CELL-THE UNIT OF LIFE
335125
Based on the position of centromere, the chromosomes are classified into how many types?
1 1
2 3
3 2
4 4
Explanation:
Based on the position of centromere, the chromosomes are classified into four types. The metacentric chromosome has middle centromere forming two equal arms of the chromosome. The sub-metacentric chromosome has centromere slightly away from the middle of the chromosome resulting into one shorter arm and one longer arm. In case of acrocentric chromosome the centromere is situated close to its end forming one extremely short and one very long arm, whereas the telocentric chromosome has a terminal centromere.
BIOXI08: CELL-THE UNIT OF LIFE
335126
Which of the following features is common to prokaryotes and eukaryotes?
1 DNA is genetic material
2 Cell wall present
3 Nuclear membrane present
4 Membrane-bound sub-cellular organelles present
Explanation:
Nuclear membrane and membrane bound organelles are absent in prokayrotes.
NCERT Exemplar
BIOXI08: CELL-THE UNIT OF LIFE
335127
In which part of the nucleus does ribosome is produced
