Answer:
Endosymbiotic theory explains that at a certain point of evolution both mitochondria and chloroplast (cyano bacteria) existed independently as prokaryotic organisms. Which were "engulfed" by eukaryotic cells but instead of being consumed a symbiotic association was developed between the cells, which over various stages of evolution became components / organelles of the eukaryotic cell due to migration of some prokaryotic genes to the eukaryotic nucleus. However, they retained their capacity of duplication due to presence of circular DNA
So, the correct answer is'The mitochondria and chloroplast have their own DNA'
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Answer:
Cytoskeleton is the lattice-like structure of microtubules that support the cytoplasm and anchors organelles and also function in cytoplasmic streaming during cell crawling.
Explanation:
A group or network of protein fibers found within the cytoplasm is known as the cytoskeleton. It provides structural support for cells and is responsible for cell movement, cell stability, cell reproduction, cytoplasmic streaming or transportation of substances, etc. The movement of the cytoplasm within a plant or animal cell which helps to transport nutrients, proteins, and organelles within the cells is known as cytoplasmic streaming or protoplasmic streaming. The main three different types of protein-based filaments found in the cytoskeleton are microtubules, intermediate filaments, and microfilaments.
They are small, thick tubes made up of a protein called tubulin. They help to maintain cell shape and structure and are a part of the mitotic spindle which pulls homologous chromosomes apart during the cell division. The structures involved in cell movements such as cilia and flagella are also made up of microtubules. They help to resist the compression of the cell, provide pathways for secretory vesicles to move through the cell and also have a role in positioning the organelles within the cell.
They are thin filaments made up of a strong and flexible protein called actin. Actin filaments along with the protein myosin are responsible for cell movement and muscle contraction. Both proteins also have a role in splitting of a parent cell into daughter cells during cell division.
Their thickness is intermediate between the microfilaments (thinnest structure) and microtubules (thickest structure). They are made up of a protein called keratin and provide structure to the nuclear envelope and help anchor organelles together within a cell. Intermediate filaments along with the microtubules help to maintain cell shape and structure. They help to resist the tension of the cells and also link cells to other cells.
Answer: Option A
Explanation:
Kinesin -1 is the major anterograde motor which helps in the transportation along micro tubules. This is important for the proper transport of the mitochondria, Golgi derived vesicles, endoplasmic reticulum tubulin, mRNA and intermediate filament sub units.
It moves along the micro tubules and for this task it gets energy from the adenosine triphosphate.
The heavy chain of KInesin 1 is made of globular head via short flexible neck and has a light chain as well which ends in the carboxy terminal.
All of the following are functions of the sensory somatic nervous system except it sends signals from the peripheral nervous system. The correct option among all the options that are given in the question is the second option. I hope that this is the answer that has actually come to your desired help.
