
A prokaryotic cell lacks
A. True nucleus
B. Nuclear membrane
C. Membrane bound organelles
D. All of the above
Answer
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Hint: Cell is the structural and functional unit of the organism, and there are different types of cells such as prokaryotic cells and eukaryotic cells, and the structure of the cell is different for both plants and animals.
Complete answer:
Prokaryotic cells are the primitive cells which are found in the early formed life on earth.
And some of the prokaryotes there is a presence of a cell wall which is absent in the eukaryotic cells.
There are large differences between the prokaryotic and eukaryotic cells, where in the prokaryotic cells there is absence of true nucleus, instead of that they have a piece of sequence of the DNA, as it is called as nucleoid.
And this nucleoid is not covered by any membrane which is present In the normal eukaryotic cells so nuclear membrane is absent in the prokaryotic cells.
These prokaryotic cells are mostly present in the unicellular organisms where the eukaryotic cells are present from the range of unicellular to multicellular organisms.
As prokaryotes are the primitive cell structure it do not possess the important cell organelles, and the membrane bound organelles are absent in the prokaryotes such as mitochondria, which is considered as powerhouse of the cells, where eukaryotic cells possess all the organelles that are surrounded by the plasma membrane .
Prokaryotic cells do not possess true nucleus and it is not surrounded by the nuclear membrane and membrane bound organelles are absent so all the above is the correct answer.
So, the correct answer is “Option D”.
Note: The first photoautotroph that formed on the earth is cyanobacteria, which is commonly called as prokaryotes, as it have all features of the prokaryotes, so from that one can say this prokaryotic cells are very primitive or first formed cells on the earth.
Complete answer:
Prokaryotic cells are the primitive cells which are found in the early formed life on earth.
And some of the prokaryotes there is a presence of a cell wall which is absent in the eukaryotic cells.
There are large differences between the prokaryotic and eukaryotic cells, where in the prokaryotic cells there is absence of true nucleus, instead of that they have a piece of sequence of the DNA, as it is called as nucleoid.
And this nucleoid is not covered by any membrane which is present In the normal eukaryotic cells so nuclear membrane is absent in the prokaryotic cells.
These prokaryotic cells are mostly present in the unicellular organisms where the eukaryotic cells are present from the range of unicellular to multicellular organisms.
As prokaryotes are the primitive cell structure it do not possess the important cell organelles, and the membrane bound organelles are absent in the prokaryotes such as mitochondria, which is considered as powerhouse of the cells, where eukaryotic cells possess all the organelles that are surrounded by the plasma membrane .
Prokaryotic cells do not possess true nucleus and it is not surrounded by the nuclear membrane and membrane bound organelles are absent so all the above is the correct answer.
So, the correct answer is “Option D”.
Note: The first photoautotroph that formed on the earth is cyanobacteria, which is commonly called as prokaryotes, as it have all features of the prokaryotes, so from that one can say this prokaryotic cells are very primitive or first formed cells on the earth.
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