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Which of the following are not membra...

Which of the following are not membrance bounds ?

A

Vacuoles

B

ribosomes

C

Lysosomes

D

Mesosomes

Text Solution

AI Generated Solution

The correct Answer is:
To determine which of the following structures are not membrane-bound, we will analyze each option provided in the question. 1. **Vacuole**: - Vacuoles are membrane-bound structures. They are surrounded by a membrane called the tonoplast. Therefore, vacuoles are not the answer. 2. **Ribosomes**: - Ribosomes are not membrane-bound organelles. They are made up of ribosomal RNA and proteins and can be found either floating freely in the cytoplasm or attached to the endoplasmic reticulum. Thus, ribosomes are not the answer. 3. **Lysosomes**: - Lysosomes are also membrane-bound structures. They contain enzymes for digestion and are surrounded by a single membrane. Therefore, lysosomes are not the answer. 4. **Mesosome**: - Mesosomes are structures found in bacteria, formed by the infolding of the plasma membrane. They are not bound by any additional membrane, as they are simply extensions of the plasma membrane. Therefore, mesosomes are the answer to the question. **Final Answer**: Mesosome is not a membrane-bound structure.
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Knowledge Check

  • Which of the following is not membrane bound?

    A
    endoplasmic reticulum
    B
    Centriole
    C
    Chloroplast
    D
    Vacuoles
  • Which of the following structure is not bounded by a cell membrane?

    A
    Ribosomes
    B
    Lysosomes
    C
    Mitochondria
    D
    Spherosomes
  • Which of the following organelles is bounded by a double membrane?

    A
    Lysosome
    B
    Nucleolus
    C
    Ribosome
    D
    Plastid
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