Which one of the following has its own DNA? from Biology NEET Y

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

Which one of the following structures between two adjacent cells is an effective transport pathway?

  • Plasmodesmata

  • Plastoquinones

  • Endoplasmic reticulum

  • Endoplasmic reticulum

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2.

Single -celled eukaryotes are included in 

  • Protista

  • Fungi 

  • Archaea

  • Archaea

597 Views

3.

In unilocular ovary with a single ovule, the placentation is 

  • marginal

  • basal

  • free central 

  • free central 

935 Views

4.

An element playing important role in nitrogen fixation is 

  • Molybdenum

  • copper

  • manganese

  • manganese

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5.

One example of animals having a single opening to the outside that serves both as mouth as well as anus is 

  • Octopus

  • Asterias

  • Ascidia

  • Ascidia

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6.

The chief water conducting elements of xylem in gymnosperms are 

  • vessels

  • fibres

  • tansfusion tissue

  • tansfusion tissue

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7.

which one of the following is not a micronutrient?

  • Molybdenum

  • Magnesium

  • Zinc

  • Zinc

475 Views

8.

Membrane -bound organelles are absent in 

  • Saccharomyces

  • Streptococcus

  • Chlamydomonas

  • Chlamydomonas

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9.

The kind of epithelium which forms the inner walls of blood vessels is 

  • cuboidal epithelium

  • columnar epithelium

  • ciliated columnar epithelium

  • ciliated columnar epithelium

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10.

Which one of the following has its own DNA?

  • Mitochondria

  • Dictyosome

  • Lysosome

  • Lysosome


A.

Mitochondria

In mitchondria, the inner membrane space is filled with a matrix which contains dense granules along with ribosomes and mitchondrial DNA.The mitochondrial DNA is circular in nature. There number varies from 2-6.Besides DNA, a mitochondrion has RNA and its ribosomes also. Thus, a complete protein synthesizing machinery is present in mitcochondria, which suggeststhe semi -autonomuous nature of mitochondria Dictyosome, lysosome and peroxisome do not have their own DNA.

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