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How many of the following concern with n...

How many of the following concern with nucleus?
Oxysomes, Cristae, Double membrane, Stroma, Nucleoplasm, Porins, Chromatin, Nuclear pores, Nucleolus, Thylakoids, 9 + 2 arrangement of Microtubules, Chlorophyll, r-RNA synthesis, Lamins protein

A

Seven

B

Five

C

Nine

D

Ten

Text Solution

AI Generated Solution

The correct Answer is:
To determine how many of the given items are concerned with the nucleus, we will analyze each item one by one: 1. **Oxysomes**: These are structures found in mitochondria and are not related to the nucleus. - **Concerned with nucleus?** No 2. **Cristae**: These are the inner folds of the mitochondria and are also not related to the nucleus. - **Concerned with nucleus?** No 3. **Double membrane**: The nucleus indeed has a double membrane structure (nuclear envelope). - **Concerned with nucleus?** Yes 4. **Stroma**: This refers to the fluid matrix of chloroplasts, not the nucleus. - **Concerned with nucleus?** No 5. **Nucleoplasm**: This is the viscous fluid inside the nucleus where the chromatin and nucleolus are suspended. - **Concerned with nucleus?** Yes 6. **Porins**: These are proteins that form pores in membranes, but they are not specific to the nucleus. - **Concerned with nucleus?** No 7. **Chromatin**: This is the material that makes up chromosomes, found within the nucleus. - **Concerned with nucleus?** Yes 8. **Nuclear pores**: These are channels in the nuclear envelope that regulate the transport of molecules in and out of the nucleus. - **Concerned with nucleus?** Yes 9. **Nucleolus**: This is a prominent sub-structure within the nucleus responsible for ribosomal RNA synthesis. - **Concerned with nucleus?** Yes 10. **Thylakoids**: These are membrane-bound structures within chloroplasts and are not related to the nucleus. - **Concerned with nucleus?** No 11. **9 + 2 arrangement of Microtubules**: This refers to the arrangement found in cilia and flagella, not related to the nucleus. - **Concerned with nucleus?** No 12. **Chlorophyll**: This is a pigment found in chloroplasts, not in the nucleus. - **Concerned with nucleus?** No 13. **r-RNA synthesis**: This process occurs in the nucleolus, which is part of the nucleus. - **Concerned with nucleus?** Yes 14. **Lamins protein**: These are intermediate filaments that provide structural support to the nuclear envelope. - **Concerned with nucleus?** Yes Now, let's count the items that are concerned with the nucleus: - Double membrane - Nucleoplasm - Chromatin - Nuclear pores - Nucleolus - r-RNA synthesis - Lamins protein Total: 7 items are concerned with the nucleus. ### Final Answer: **7**
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