Class 11 · Cell: The Unit of Life

Eukaryotic Cell Structure & Functions — NEET Biology

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A typical eukaryotic cell consists of a cell membrane, nucleus and cytoplasm. Plant cells have a cell wall outside the cell membrane. The plasma membrane is selectively permeable to ions and organic molecules and controls the movement of substances in and out of cells. The endomembrane system includes ER, golgi complex, lysosomes and vacuoles. All the cell organelles perform different but specific functions.Centriosomes and centrioles form the basal body of cilia and flagella that facilitate locomotion. In animal cells, centrioles also form spindle apparatus during cell division. Nucleus contains chromatin material which contains the DNA. The nucleus not only controls the activities of organelles but also plays a major role in heredity.

NCERT Biology · Class 11 · Chapter 8 · Paragraph 74
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Which of the following statements concerning eukaryotic cell organelles are correct? S1: Ribosomes are non-membrane bound organelles found in the cytoplasm, as well as within chloroplasts (in plants) and mitochondria. S2: Centrosomes are non-membrane bound organelles present in plant cells, helping in cell division. S3: The endomembrane system includes endoplasmic reticulum, golgi complex, lysosomes, vacuoles, and mitochondria due to their coordinated functions. S4: Plant cells possess cell walls, plastids, and a large central vacuole, which are generally absent in animal cells. S5: Eukaryotic ribosomes are 80S, composed of 60S and 40S subunits, while prokaryotic ribosomes are 70S, with 50S and 30S subunits.

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