I. Describe the structure and function of the nucleus and mitochondria. The mitochondria is a semi-autonomous organelle which reproduces by bynary fission and has its own DNA. Its main function is to produce the energy intermediate ATP‚ through ATP synthase. Mitochondria could be considered a cell inside a cell. It has its own membranes (inner and outer membranes)‚ its ribosomes (to produce the proteins encoded in its DNA)‚ a matrix -- where aerobic respiration occurs. The invaginations of the inner
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The nucleus is the largest and most prominent organelle‚ occupying about 10% of the total volume of a cell and can have a varying number of nuclei. It could be uni-nucleate – single nucleus; bi-nucleate – two nuclei or even multi-nucleate. The nucleus separates itself from the surrounding cytoplasm by the double membrane around it called the nuclear envelope‚ this helps to regulate the flow of certain substances going in and out of the nucleus. At varying points around the nucleus‚ the two membranes
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We all know that even though a cell is the basic unit of an organism it can be pretty complex inside of one. So why don’t we try and make it a little simpler by comparing it to something we’re all more comfortable with? Take Disneyland for example! Everyone is familiar with Disneyland and how it works. Let’s see just how similar these two can be. First‚ would be the entrance gate. The entrance gate could be our cytoplasm. Cytoplasm is the jelly-like fluid that fills a cell and inside is all the
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In an eukaryotic cell‚ DNA is tightly packaged into the nucleus. For a human cell‚ DNA measures approximately 2 meters‚ with its diameter being 2 nm. The total length of DNA present in one adult human is nearly 2.0 × 1013 meters‚ which is equivalent to nearly 70 trips from the earth to the sun and back. Since the size of the nucleus in human cell is about 6 μm‚ DNA should be tightly packaged to fit into it. At the same time‚ it should be easily accessible to express the genetic information. Inside
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All organisms that are considered to be alive must possess certain key characteristics or functions. These include: order‚ response to the environment‚ reproduction‚ growth and development‚ regulation‚ energy processing and evolution. Since we recognize life by what living things do‚ these seven characteristics serve to define life. Organisms consist of one or more cells and while they may be very complex they are highly organized and coordinated. Inside each cell‚ atoms make up molecules.
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Every living thing in the world‚ large‚ or small‚ plant or animal‚ are made up of cells. All living things are composed of basic building blocks of life called cells. Cells are special; they vary in shape and size. Cells can be round‚ square‚ spindle-shaped and star-like (Cells‚ 2017). Cells carry out many roles inside your body. For instance‚ the macrophage is large white blood cells that is part of our immune system and is responsible for locating and eating microscopic foreign bodies. Epithelial
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How organelles work together: The organelles have to work together‚ in cells‚ in order to carry out functions. One main process that requires the organelles to work together for is protein synthesis. Most animal cells make proteins. The nucleus is the organelle in the cell which contains the material needed to produce a protein. The nucleus holds DNA. A copy of part of the DNA is made which is called mRNA. This leaves the nucleus and interacts with ribosomes which are located in the cytoplasm or
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Image Example Function of each part Main Function Euglena Structure of a euglena: Flagellated protozoan that lives in the fresh waters. It is composed of chlorophyll and a rudimentary eye. Reservoir: part of a euglena that serves to accumulate. Nucleus: central organ of a Eugene. Contractile vacuole: cavity of a euglena that has the capacity to contract. Cell membrane: membrane that wraps euglena. Chloroplast: organelle of a euglena where photosynthesis is. Nucleolus: body shaped like a sphere
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What is Life Life is defined as a characteristic that distinguishes that have signaling and self sustaining processes from those that don’t. If an organism can perform certain functions such as movement‚ respiration‚ sensitivity‚ growth‚ reproduction‚ excretion‚ and nutrition‚ it is classified as a living organism. Life began from the basic building block of all living things‚ called cells. All organisms derived from single celled organisms. Cells are the basic building blocks of life and are
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The Evolution of Eukaryotic Cells from Prokaryotic Cells DNA- Deoxyribonucleic acid (DNA)‚ a self-replicating material present in nearly all living organisms‚ is the acid that carries genetic information. RNA- Ribonucleic acid (RNA)‚ is an acid that is present in all living cells‚ it’s main role is to act as messenger and carry instructions from DNA fro controlling the synthesis of proteins. What are Eukaryotic Cells and Eukaryotic Organisms? A eukaryotic cell is a cell that contains complex
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