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Standard XII
Biology
Question

Which of the following statements is/are correct?
  1. Prokaryotic cells are always multicellular.
  2. Nuclear membrane is absent in prokaryotes.
  3. Prokaryotic cells contains multiple chromosomes.
  4. None of these

A
Prokaryotic cells contains multiple chromosomes.
B
Nuclear membrane is absent in prokaryotes.
C
None of these
D
Prokaryotic cells are always multicellular.
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Solution
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  • Prokaryotes lack a true nucleus with a well-defined nuclear membrane and other membrane-bound organelles.
  • They have a simple structural organization. They are unicellular and division of labour is absent.

So, the correct answer is option B.

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Similar Questions
Q1
Which is correct option amongst the following statements?
(a) Nuclear membrane, chloroplast, mitochondria, microtubules and pili are absent in prokaryotic cells.
(b) Nuclear membrane, chloroplast, mitochondria, microtubules and pili are present in eukaryotic cells
(c) Ribosomes are 70S in prokaryotic cells and mitochondria. They are 80 S in animal cells.
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Q2
Which of the following is always absent in prokaryotic cells?
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Q3

The single nuclear material without nuclear membrane present in the prokaryotic cell is called:


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Q4
Which of these statements is/are true?

(i) The surface area available for cellular functions in a prokaryotic cell is less than that in a eukaryotic cell.
(ii) The total genome size of a prokaryotic cell is always less than that of a eukaryotic cell.
(iii) Unlike eukaryotes, no special respiratory organelles are found in prokaryotes. Hence they respire at a much less rate than eukaryotes.
(iv) Eukaryotic cells show various membrane-bound organelles such as chloroplasts and nucleus while ribosomes are the only membrane-bound organelles found in prokaryotes.

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Q5
Read the following statements and identify the correct option given.
I. In prokaryotic cell. The nuclear membrane, chloroplast, mitochondria, microtubules and different kinds of pili are absent.
II. In eukaryotic cell, the nuclear membrane, chloroplast, mitochondria and pili are present.
III. In prokaryotic cell, the ribosome is of 70 S type and in mitochondria of eukaryotic animal cell, the ribosome is of 80 S type.
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