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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Chapter 3: The Multiple Choice 1. a. b. c. d. e. 2. a. b. c. d. e. 3. a. b. c. d. Cellular Level of Organization What are the three main parts of a eukaryotic cell? Plasma membrane‚ organelles‚ cytoplasm Plasma membrane‚ organelles‚ nucleus Plasma membrane‚ cytoplasm‚ organelles Plasma membrane‚ cytoplasm‚ nucleus Plasma membrane‚ cytosol‚ organelles Plasma membranes consist of what three components? Phospholipids‚ glycoproteins‚ water Proteins‚ cholesterol‚ fatty acids Cholesterol‚ fatty acids
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1. water molecules have +0 charged ends and can form weak hydrogen bonds . water is said to be a dipolar molecule. 2. The basic uits of CO2 are monosaccharides ‚ characterized by the number of carbon atoms‚ e.g pentose sugars have 5 carbons 3. Two monossaccharids can link together to form a disaccharide . the bond between them is a glycosidic linkage formed in a condensation reaction 4. Starch is a polysaccharide composed of amylose and amylopectin. Its main function is as a storage
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Damn Near Everything There Is To Know About Cells: Biology Cell Report There are many parts of a cell‚ they all have specific duties‚ and are all needed to continue the life of the cell. Some cells exist as single-celled organisms that perform all of the organism’s metabolism within a single cell. Such single-celled organisms are called unicellular. Other organisms are made up of many cells‚ with their cells specialized to perform distinct metabolic functions. One cell within an organism may
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Chapter-8 Cell: The Unit Of Life What is a cell? Cell is the basic or fundamental structural and functional unit of an organism. What is cell biology? The branch of biology that deals with the study of cell structure and function is called cell biology. DISCOVERIES; Who discovered cell? Robert Hooke observed a live cell in 1665. He observed the cell(actually the cell walls) in the slice of cork under his compound microscope ‚coined the term cell‚ recorded his observations in micrographic
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MEMBRANE is a selectively permeable passage way. CELL MEMBRANE is made up of protein‚ lipid‚ & carbohydrate molecules Cell membrane is BILAYER of phospholipid molecules CYTOPLASM –contains organelles‚ cytoskeleton‚ suspended in CYTOSOL ENDOPLASMIC RETICULUM transports protein & lipids in cytoplasm RIBOSOMS synthesize protein CENTROSOME contains centrioles that aid in distributing chromosomes during cell division VESICLES contain
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directing all of the cells activities g. Ribosomes- produce proteins h. Cytoplasm- fill between cell membrane and nucleus i. Mitochondria- convert energy stored in food to energy the cell can use to live and function j. Endoplasmic reticulum- (ER) in an organelle w/ a network of membranes that produces many substances k. Golgi apparatus- receives proteins and other newly formed materials from the ER‚ packages them and distributes them to other parts of the cell l
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where the axons split off and releases neurotransmitters 4.) The nissl body is a large granule body found in neurons. They are so highly concentrated they can be seen with a light microscope when properly stained. They are made of rough endoplasmic reticulum and are the site of protein synthesis. They manufacture the neurotransmitters which the neuron must
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Name and describe the three main parts of a cell. plasma membrane-forms a cell’s flexible outer surface‚ separating the cell’s internal environment (inside the cell) from its external environment (outside the cell) cytoplasm- consists of all the cellular contents between the plasma membrane and the nucleus. nucleus- is the largest organelle of a cell. The nucleus acts as the control center for a cell because it contains the genes‚ which control cellular structure and most cellular activities
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|This is the center of the cell where the majority of the genetic material‚ such as DNA‚ | |(Eukaryotic) |is stored. | |Endoplasmic Reticulum |This is a system of membrane-enclosed sacs and tubules within the cell. It is | |(Eukaryotic) |responsible for the manufacturing of the other membranes‚ proteins‚ and lipids.
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