Which of the cell organelle lacks membrane? from Biology NEET Ye

Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

31.

Quiescent centre is found in plants at

  • root tip

  • cambium

  • shoot tip

  • leaf tip


32.

When the cell is fully turgid, its

  • DPD = OP

  • DPD = zero

  • WP = TP

  • OP = zero


33.

Which one is true for ATP?

  • ATP is a prosthetic part of an enzyme

  • ATP is an enzyme

  • ATP is the organic ions of enzyme

  • ATP is a coenzyme


34.

Purines possess nitrogen at

  • 1, 2, 4 and 6 position

  • 1, 3, 5 and 7 position

  • 1, 3, 7 and 9 position

  • 1, 2, 6 and 8 position


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35.

Thylakoids occur inside

  • mitochondria

  • chloroplast

  • Golgi apparatus

  • endoplasmic reticulum


36.

Chitin is a

  • polysaccharide

  • nitrogenous polysaccharide

  • lipoprotein

  • protein


37.

Mitochondria are semiautonomous as they possess

  • DNA

  • DNA and RNA

  • DNA, RNA and ribosomes

  • Protein


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38.

Which of the cell organelle lacks membrane?

  • Mesosome

  • Mitochondria

  • Ribosome

  • Liposome


C.

Ribosome

Ribosomes are the granular structures, composed of ribonucleic acid (RNA) and proteins acid and hence,  are not surrounded by any membrane. They were first observed by George Palade (1953) under the electron microscope as dense particles. The eukaryotic ribosomes are 80S, while the prokaryotic ribosomes are 70S.


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39.

Interfascicular cambium is a

  • primary meristematic tissue

  • primordial meristem

  • type of protoderm

  • secondary meristematic tissue


40.

Chloroplast dimorphism is a characteristic feature of

  • plants with Calvin cycle

  • C4 -plants

  • all plants

  • only in algae


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