Tag: organization of life
Questions Related to organization of life
Prokaryotic cells bear smaller nucleus as compared to eukaryotic cells.
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True
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False
Prokaryotic cells are primitive cells. They do not have well defined membrane bound nucleus. Nuclear material of a prokaryotic cell consists of a single chromosome which is in direct contact with cytoplasm. Here, the undefined nuclear region in the cytoplasm is called as nucleoid, i.e., there is no nuclear membrane.
How is a prokaryotic cell different from a eukaryotic cell ?
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Prokaryotic cells- nucleoid, Eukaryotic cells- nucleus
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Prokaryotic cells- 70S type of ribosomes, Eukaryotic cells- 80S type of ribosomes
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Both A and B
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None of these
So, the correct answer is option C.
Bacteria differ from other plants in that, they do not have
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DNA
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RNA
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Cell wall
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A well defined nucleus
Bacteria and plant cells possess DNA, RNA and cell wall. Bacteria being a prokaryote, lacks membrane bounded nucleus. Their genetic material is present in undefined nuclear region in the cytoplasm is called as nucleoid. while plant is a eukaryote, which has organized nucleus with double wall nuclear membrane.
An animal cell, a plant cell and a bacterium share the following structural features.
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Cell membrane, endoplasmic reticulum, vacuoles
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Cell wall, plasma membrane, mitochondria
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Cell wall, nucleus, cytoplasm
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Plasma membrane, cytoplasm, ribosomes
Animal cell, plant cell and bacterium have plasma membrane, cytoplasm and ribosomes as common parts. Cell organelles and nucleus are absent in bacterial cell but present in animal and plant cells.
Choose the difference between prokaryotes and eukaryotes?
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Prokaryotes have RNA, eukaryotes have DNA.
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Prokaryotes have a nucleoid, eukaryotes have a nucleus.
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Prokaryotes have DNA, eukaryotes have RNA.
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Prokaryotes have a nucleus, eukaryotes have a nucleoid.
Prokaryotic cells are primitive cells. They
do not possess many membrane bound organelles as mitochondria, lysosomes etc.
They also do not have well defined membrane bound nucleus. Nuclear
material of a prokaryotic cell consists of a single chromosome which is
in direct contact with cytoplasm. Here, the undefined nuclear region
in the cytoplasm is called as nucleoid, i.e., there is no nuclear membrane.
Eukaryotes possess well defined nucleus and membrane bound organelles as mitochondria, Golgi complex, etc. Nucleus is bound with double membrane in eukaryotic cell in which most of the genetic material is present.
The main difference between the prokaryotic cell and the eukaryotic cell is that in the prokaryotic cell there is no
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Mitochondria
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Cell wall
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Genetic system
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Distinct nucleus
In the prokaryotic cell, there is no definite nucleus with a nuclear membrane. But the genetic material is distributed throughout the cytoplasm of the cell. Along with some of them may have cell wall and mitochondria.
All animals are eukaryotes and multi-cellular.
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True
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False
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Ambiguous
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Data insufficient
Organisms are divided into five kingdoms by R.H.Whittaker. According to this classification all the prokaryotes and unicellular organisms are grouped under kingdom Monera and some in kingdom Protista.
Most of the animals are motile.
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True
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False
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Ambiguous
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Data insufficient
Animals are multi-cellular and eukaryotic. Most of them are highly developed as compared to plants. They have a specific locomotory organ for moving from one place to another.
The numbers of vacuoles are __________ in animals are compared to plants.
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More
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Less
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Same
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Can't define
Plants don't have excretory system, thus possess larger vacuole to store their waste metabolites. Whereas animals have comparatively smaller vacuoles used for storage's of food materials. Thus the number of vacuoles in animal cell would be larger due to its size as compared to plants.
Bacteria differ from eukaryotes in absence of
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DNA
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Basic proteins
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Histones
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Both B and C
Prokaryotic cells synthesize a set of small, usually basic proteins that bind DNA and are collectively called histone- like proteins because their biochemical properties resemble eukaryotic histones but histones are absent in Bacteria