1. Identification of Some Macromolecules 1) What are 2 types of treatment controls‚ and explain each. Positive control: gives positive result if experimental conditions were followed correctly Negative control: gives negative result if experimental conditions were followed correctly 2) What are the most abundant elements in living material? Carbon‚ Hydrogen‚ Oxygen‚ Nitrogen‚ Sulfur and Phosphorus 3) What are the 4 major biological macromolecules? Carbohydrates (monosaccharides &
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between cell divisions‚ called interphase or interkinesis‚ varies greatly but is considerably longer. During INTERPHASE the chromosomes are dispersed in the nucleus and appear as a network of long‚ thin threads or filaments‚ called the chromatin. At some point before prophase begins‚ the chromosomes replicate themselves to form pairs of identical sister chromosomes‚ or chromatids; the deoxyribose nucleic acid (DNA) of the chromosomes is synthesized only during interphase‚ not while mitosis is in process
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R E V I E W S H E E T EXERCISE 4 Print Form Anatomy of the Composite Cell 1. Define the following terms: are the metabolic machinery of the cell‚ the are highly organized tp carry out specific functions of the organelle: cell as a whole. the structural and functional unit of all living things. cell: 2. Although cells have differences that reflect their specific functions in the body‚ what functions do they have in common? All cells can maintain their own boundaries‚ metabolize
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The Cell Cycle Mitosis: the process by which cells reproduce themselves‚ resulting in daughter cells that contain the same amount of genetic material as the parent cell. Interphase Prophase Metaphase Anaphase Telophase Cytokinesis Cell Division Occurs in a series of stages of phases Interphase occurs before mitosis begins Chromosomes are copied (# doubles) Chromosomes appear as threadlike coils (chromatin) at the start‚ but each chromosome and its copy(sister chromosome) change to sister
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@ Mitosis begins Cell moves from interphase into mitosis-----DNA and chromosome (have been replicated and ready to separate) 细胞相间移动，DNA和chromosome已经复制，准备分离 Biologists often refer to the process in separate subphases because of significant events that occur. 一般当成单独的子阶段，因为重要 @The phases of mitosis 1. Prophase (before phase) Chromosomes become visible as thread-like form when using light microscope. Each chromosome is duplicated and consists of two sister chromatids‚ join together by a centromere
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in a cell leading to its division and duplication that produces two daughter cells. In cells without a nucleus‚ the cell cycle occurs via a process termed binary fission. In cells with a nucleus‚ the cell cycle can be divided in three periods: interphase—during which the cell grows‚ accumulating nutrients needed for mitosis preparing it for cell division and duplicating its DNA—and the mitotic phase‚ during which the cell splits itself into two distinct cells‚ often called "daughter cells" and
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What is the role of the nucleosome in supercoiling AND in the regulation of transcription (You will have to check Campbell Ch. 18pp.) The nucleosome is basically 3. Interphase is broken down into distinguishable phases. What are these parts of Interphase and what happens in the cell for each? Interphase is broken down into G S phase‚ and G . During G
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Discussion The various stages of nuclear division were observed in this experiment. These stages are prophase‚ metaphase‚ anaphase and telophase. There are two types of nuclear division include mitosis and meiosis. Mitotic cell division is involved in the formation of an adult organism from a fertilized egg‚ asexual reproduction‚ regeneration‚ and maintenance or repair of body parts. Mitosis typically results in new somatic‚ or body cells. Meiosis results in the formation of either gametes in animals
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the highest percentage of cells undergoing mitosis. The whitefish blastula is formed directly after the egg is fertilized. This is a period of rapid growth and numerous cellular divisions where mitosis can be observed. In mitosis the cell is in interphase‚ and have a distinct nucleus and nucleoli where the thin threads of chromatin thicken into distinct chromosomes and the nuclear evvelope breaks open releasing them into the cytoplasm. The firs signs of the spindle begin to appear‚ next the cell
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Mitosis is a way to help your body replace worn out cells. Mitosis has five phases‚ six if you include Cytokinesis. The phases of Mitosis are Interphase‚ Prophase‚ Metaphase‚ Anaphase‚ and Telophase. These phases all work together in order to help recover worn out muscles ‚ skin and other types of cells. Mitosis is when one cell divides into two daughter cells. Mitosis is very useful for organisms. Without Mitosis organisms would not be able to repair cuts and could result in death. It is also
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