168879
Animal cell differs form plant cells in not having the:
1 Cell wall
2 plastids
3 glyoxysomes
4 all of these J\
K CET-2002
Explanation:
D Animal cell differ from plant cell in possessing a centrosome that participates in the formation of spindle apparatus during ell division. Plant cell have plastids but animal cell do not have Plastids centrosomes are absent in plant cells, animal cell have centrosome, Glyoxysomes are micro bodies which occur only in fat rich plant cell.
Cell : Structure and Functions
168881
Choose the wrong statement regarding AIDS
1 AIDS is an immunodeficiency disease
2 It is caused by a retrovirus, HIV
3 HIV selectively infects and kills Blymphocytes
4 Retroviruses have RNA genomes that replicate via DNA intermediate
5 Viral RNA genome is converted into DNA copy by reverse transcriptase
Explanation:
C A retro virus is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that in invades, thus changing the genome of the cell HIV is an enveloped retrovirus. Each virus particles contains two copies of an RNA genome. RNA virus such as HIV have RNA genomes, which can also be either double stranded or single stranded. Their genomes can be either RNA or DNA. Retroviruses are ssRNA viruses that replicate through a DNA.
Kerala PMT-2009
Cell : Structure and Functions
168883
Consider the following statement: (1) In plant cells, cytokinesis start with the formation of the phragmoplast (2) phragmoplast comprises interzonal macrotubules and Golgi vesicles (3) Primary cell wall is produced by microtubules (4) Phragmoplast is formed by nucleus
1 1,2 and 3 are correct
2 1 and 2 are correct
3 1,2 and 4 are correct
4 1 and 3 are correct
Explanation:
A The phragmoplast is a plant cell specific structure that form during late cytokinesis. This complex assembly of microtubules actin filaments and associated molecules acts as a framework for cell plate assembly and subsequent formation of the future cell wall separating the two daughter cells cellular component. The phragmoplast (form from golgi body) initially contains the congruent orientation of the cortical array of microtubules which lies just inside the plasma membranes and cellulose micro fibrils lying just outside. In the progressive stages phragmoplast forms barrel shaped organ with microtubules golgi apparatus, ribosome and endoplasmic reticulum. The primary cell wall is assembled by the deposition of polymers, hemicelluloses pectin.
BHU PMT (Mains)-2006
Cell : Structure and Functions
168884
Double membrane structure of cell are:
1 Nucleus
2 chloroplast
3 mitochondria
4 all of these
Explanation:
D Nucleus is a spherical cellular component that is surrounded by a nuclear double membrane nucleus is a cellular comportment of the cell containing the genetic material. The chloroplast is the plant organelle that consist of flattened discoid sacs called thylakoids this organelle consumes carbon dioxide and liberates oxygen. Mitochondria shows catabolism which is defined to be the set of reactions that allows the breakdown of large molecules along with the release of energy.
168879
Animal cell differs form plant cells in not having the:
1 Cell wall
2 plastids
3 glyoxysomes
4 all of these J\
K CET-2002
Explanation:
D Animal cell differ from plant cell in possessing a centrosome that participates in the formation of spindle apparatus during ell division. Plant cell have plastids but animal cell do not have Plastids centrosomes are absent in plant cells, animal cell have centrosome, Glyoxysomes are micro bodies which occur only in fat rich plant cell.
Cell : Structure and Functions
168881
Choose the wrong statement regarding AIDS
1 AIDS is an immunodeficiency disease
2 It is caused by a retrovirus, HIV
3 HIV selectively infects and kills Blymphocytes
4 Retroviruses have RNA genomes that replicate via DNA intermediate
5 Viral RNA genome is converted into DNA copy by reverse transcriptase
Explanation:
C A retro virus is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that in invades, thus changing the genome of the cell HIV is an enveloped retrovirus. Each virus particles contains two copies of an RNA genome. RNA virus such as HIV have RNA genomes, which can also be either double stranded or single stranded. Their genomes can be either RNA or DNA. Retroviruses are ssRNA viruses that replicate through a DNA.
Kerala PMT-2009
Cell : Structure and Functions
168883
Consider the following statement: (1) In plant cells, cytokinesis start with the formation of the phragmoplast (2) phragmoplast comprises interzonal macrotubules and Golgi vesicles (3) Primary cell wall is produced by microtubules (4) Phragmoplast is formed by nucleus
1 1,2 and 3 are correct
2 1 and 2 are correct
3 1,2 and 4 are correct
4 1 and 3 are correct
Explanation:
A The phragmoplast is a plant cell specific structure that form during late cytokinesis. This complex assembly of microtubules actin filaments and associated molecules acts as a framework for cell plate assembly and subsequent formation of the future cell wall separating the two daughter cells cellular component. The phragmoplast (form from golgi body) initially contains the congruent orientation of the cortical array of microtubules which lies just inside the plasma membranes and cellulose micro fibrils lying just outside. In the progressive stages phragmoplast forms barrel shaped organ with microtubules golgi apparatus, ribosome and endoplasmic reticulum. The primary cell wall is assembled by the deposition of polymers, hemicelluloses pectin.
BHU PMT (Mains)-2006
Cell : Structure and Functions
168884
Double membrane structure of cell are:
1 Nucleus
2 chloroplast
3 mitochondria
4 all of these
Explanation:
D Nucleus is a spherical cellular component that is surrounded by a nuclear double membrane nucleus is a cellular comportment of the cell containing the genetic material. The chloroplast is the plant organelle that consist of flattened discoid sacs called thylakoids this organelle consumes carbon dioxide and liberates oxygen. Mitochondria shows catabolism which is defined to be the set of reactions that allows the breakdown of large molecules along with the release of energy.
168879
Animal cell differs form plant cells in not having the:
1 Cell wall
2 plastids
3 glyoxysomes
4 all of these J\
K CET-2002
Explanation:
D Animal cell differ from plant cell in possessing a centrosome that participates in the formation of spindle apparatus during ell division. Plant cell have plastids but animal cell do not have Plastids centrosomes are absent in plant cells, animal cell have centrosome, Glyoxysomes are micro bodies which occur only in fat rich plant cell.
Cell : Structure and Functions
168881
Choose the wrong statement regarding AIDS
1 AIDS is an immunodeficiency disease
2 It is caused by a retrovirus, HIV
3 HIV selectively infects and kills Blymphocytes
4 Retroviruses have RNA genomes that replicate via DNA intermediate
5 Viral RNA genome is converted into DNA copy by reverse transcriptase
Explanation:
C A retro virus is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that in invades, thus changing the genome of the cell HIV is an enveloped retrovirus. Each virus particles contains two copies of an RNA genome. RNA virus such as HIV have RNA genomes, which can also be either double stranded or single stranded. Their genomes can be either RNA or DNA. Retroviruses are ssRNA viruses that replicate through a DNA.
Kerala PMT-2009
Cell : Structure and Functions
168883
Consider the following statement: (1) In plant cells, cytokinesis start with the formation of the phragmoplast (2) phragmoplast comprises interzonal macrotubules and Golgi vesicles (3) Primary cell wall is produced by microtubules (4) Phragmoplast is formed by nucleus
1 1,2 and 3 are correct
2 1 and 2 are correct
3 1,2 and 4 are correct
4 1 and 3 are correct
Explanation:
A The phragmoplast is a plant cell specific structure that form during late cytokinesis. This complex assembly of microtubules actin filaments and associated molecules acts as a framework for cell plate assembly and subsequent formation of the future cell wall separating the two daughter cells cellular component. The phragmoplast (form from golgi body) initially contains the congruent orientation of the cortical array of microtubules which lies just inside the plasma membranes and cellulose micro fibrils lying just outside. In the progressive stages phragmoplast forms barrel shaped organ with microtubules golgi apparatus, ribosome and endoplasmic reticulum. The primary cell wall is assembled by the deposition of polymers, hemicelluloses pectin.
BHU PMT (Mains)-2006
Cell : Structure and Functions
168884
Double membrane structure of cell are:
1 Nucleus
2 chloroplast
3 mitochondria
4 all of these
Explanation:
D Nucleus is a spherical cellular component that is surrounded by a nuclear double membrane nucleus is a cellular comportment of the cell containing the genetic material. The chloroplast is the plant organelle that consist of flattened discoid sacs called thylakoids this organelle consumes carbon dioxide and liberates oxygen. Mitochondria shows catabolism which is defined to be the set of reactions that allows the breakdown of large molecules along with the release of energy.
168879
Animal cell differs form plant cells in not having the:
1 Cell wall
2 plastids
3 glyoxysomes
4 all of these J\
K CET-2002
Explanation:
D Animal cell differ from plant cell in possessing a centrosome that participates in the formation of spindle apparatus during ell division. Plant cell have plastids but animal cell do not have Plastids centrosomes are absent in plant cells, animal cell have centrosome, Glyoxysomes are micro bodies which occur only in fat rich plant cell.
Cell : Structure and Functions
168881
Choose the wrong statement regarding AIDS
1 AIDS is an immunodeficiency disease
2 It is caused by a retrovirus, HIV
3 HIV selectively infects and kills Blymphocytes
4 Retroviruses have RNA genomes that replicate via DNA intermediate
5 Viral RNA genome is converted into DNA copy by reverse transcriptase
Explanation:
C A retro virus is a type of RNA virus that inserts a copy of its genome into the DNA of a host cell that in invades, thus changing the genome of the cell HIV is an enveloped retrovirus. Each virus particles contains two copies of an RNA genome. RNA virus such as HIV have RNA genomes, which can also be either double stranded or single stranded. Their genomes can be either RNA or DNA. Retroviruses are ssRNA viruses that replicate through a DNA.
Kerala PMT-2009
Cell : Structure and Functions
168883
Consider the following statement: (1) In plant cells, cytokinesis start with the formation of the phragmoplast (2) phragmoplast comprises interzonal macrotubules and Golgi vesicles (3) Primary cell wall is produced by microtubules (4) Phragmoplast is formed by nucleus
1 1,2 and 3 are correct
2 1 and 2 are correct
3 1,2 and 4 are correct
4 1 and 3 are correct
Explanation:
A The phragmoplast is a plant cell specific structure that form during late cytokinesis. This complex assembly of microtubules actin filaments and associated molecules acts as a framework for cell plate assembly and subsequent formation of the future cell wall separating the two daughter cells cellular component. The phragmoplast (form from golgi body) initially contains the congruent orientation of the cortical array of microtubules which lies just inside the plasma membranes and cellulose micro fibrils lying just outside. In the progressive stages phragmoplast forms barrel shaped organ with microtubules golgi apparatus, ribosome and endoplasmic reticulum. The primary cell wall is assembled by the deposition of polymers, hemicelluloses pectin.
BHU PMT (Mains)-2006
Cell : Structure and Functions
168884
Double membrane structure of cell are:
1 Nucleus
2 chloroplast
3 mitochondria
4 all of these
Explanation:
D Nucleus is a spherical cellular component that is surrounded by a nuclear double membrane nucleus is a cellular comportment of the cell containing the genetic material. The chloroplast is the plant organelle that consist of flattened discoid sacs called thylakoids this organelle consumes carbon dioxide and liberates oxygen. Mitochondria shows catabolism which is defined to be the set of reactions that allows the breakdown of large molecules along with the release of energy.
