Which one of the following cell organelles is enclosed by a single membrane ? [2016]a)Mitochondriab)Chloroplastsc)Lysosomesd)NucleiCorrect answer is option 'C'. Can you explain this answer?

Question

Which one of the following cell organelles is enclosed by a single membrane ?    [2016]a)Mitochondriab)Chloroplastsc)Lysosomesd)NucleiCorrect answer is option 'C'. Can you explain this answer?

Answer

Nuclei, mitochondria and chloroplasts are all double membrane bound organelles. Lysosomes are bound by single layer of typical phospholipids. So, the correct answer is option C.

Answer

Indian army you are like

Answer

Endomembrane system

Answer

Single membrane bound organelles lysosomes , peroxisomes , vacuoles organelles lacking any membrane , ribosomes , centrioles , nucleolus , nucleus and ribosomes , genetic control of the cell nucleus is the most distinct structure inside cell visible with light microscope

Answer

Lysosome → Single membrane bound,.

Chloroplast, nucleus & mitochondria → Double membrane bound

Answer

C) Lysosomes

Answer

C

Answer

Lysosomes

Answer

All the organalles forming Endomembrane system are single membrane bound. Lysosome is one of them
other three are double membrane bound.

Answer

C Lysosome

Answer

Answer

All of them (except lysosome ) are double membrane organelle

Answer

C answer is correct because lysosome's are bounded with single layer ( lysoaomes are also called suisidal bags of cell)

Answer

It is covered by tonoplast..

see ncert class 11 for ur reference

Answer

Cell Organelles Enclosed by a Single Membrane

Lysosomes
Lysosomes are cell organelles that are enclosed by a single membrane. They are often referred to as the 'suicide bags' of the cell because they contain powerful enzymes that can break down various molecules. Lysosomes are responsible for the digestion of cellular waste materials, old organelles, and foreign substances that enter the cell.

Structure of Lysosomes
Lysosomes are small spherical organelles that are formed by the Golgi apparatus. They contain hydrolytic enzymes, such as proteases, lipases, and nucleases, which are responsible for breaking down proteins, lipids, and nucleic acids, respectively. These enzymes work optimally in an acidic environment, which is maintained by the proton pumps present in the lysosomal membrane.

Functions of Lysosomes
1. Digestion: Lysosomes play a crucial role in the intracellular digestion of macromolecules. They fuse with endocytic vesicles formed during the process of endocytosis, allowing the enzymes to break down the engulfed substances.
2. Autophagy: Lysosomes are involved in autophagy, which is the process of self-degradation of unnecessary or damaged cellular components. They fuse with autophagosomes, which are double-membrane vesicles containing cellular waste, and digest their contents.
3. Defense: Lysosomes also participate in the defense mechanisms of the cell. They can engulf and destroy bacteria, viruses, and other foreign particles through a process called phagocytosis.
4. Recycling: Lysosomes break down old or dysfunctional organelles through a process called autophagy. This allows the cell to recycle the components and reuse them for cellular processes.

Comparison with Other Organelles
- Mitochondria and chloroplasts are double-membrane organelles involved in energy production through cellular respiration and photosynthesis, respectively.
- Nuclei are membrane-bound organelles that contain the cell's genetic material and are responsible for controlling gene expression and cell division.

Conclusion
Lysosomes are cell organelles enclosed by a single membrane. They are involved in the digestion of cellular waste, autophagy, defense mechanisms, and recycling of cellular components. By understanding the structure and functions of lysosomes, we can appreciate their importance in maintaining cellular homeostasis and overall cell function.

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