Biology Q. 1. Biological organisation starts with: a. Atomic level b. Submicroscopic molecular level c. Cellular level d. Organismic level Sol. Correct choice: (2) Q. 2. About 98 percent of the mass of every living organism is composed of just six elements including carbon‚ hydrogen‚ nitrogen‚ oxygen and: a. calcium and phosphorous b. phosphorus and sulphur c. sulphur and magnesium d. magnesium and sodium Sol. Correct choice: (1) Q. 3. Which one of the following is an example of negative
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1. Taxol its generic name being palitaxel stabilises cytoskeletal microtubes and thus spindles cannot be formed so cell division is prevented. During telophase taxol causes the reversal of prophase events such as the chromosomes decondense‚ spindle disassembly‚ nuclear envelope reformation‚ the Golgi apparatus and E.R. reform and the nucleus also reforms. Cytokinesis effects are that the cell still divides for animal cells a cleavage furrow made of actin and myosin II constricts the middle of the
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David Stem Cell paper T-T 11:20 Stem Cells and Cloning 1. Cloning is one of the most widely talked about topics in this world. The people that defend cloning believe that cloning and genetic engineering will be the answer to most of the diseases in the future. On the other hand‚ the people against it think of it as ‘ playing God ’. Cloning is unethical because people will lose their identities if their clones come into
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Background Information: Cell Transport When molecules move from a high to low concentration it is called moving DOWN the concentration gradient. When molecules move from a low to high concentration it is called moving AGAINST the concentration gradient. When the concentration of a solute is the same throughout a system‚ the system is at EQUILIBRIUM. What kind of transport DOES NOT require energy? PASSIVE What kind of transport requires energy? ACTIVE Which CELL PART provides the energy for
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What I Want I always wanted to have lots of things since I was a kid. I wanted sport balls‚ toys‚ games‚ iPods‚ a brother and so much more‚ but the most I wanted was my very own phone. There was a time when I really wanted a phone but was not able to get it because it costs too much and because I am too young. Everyone in school and all my friends started getting a phone but I wasn’t able to. I was not too or desperate for getting a phone then until I started working. At first I would work with
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inactivity. Many schools are not required to have any physical education. Unfortunately‚ Davies’ states: “Many of those schools are so short of money they’ve scrapped physical-fitness classes” and “too few communities have athletic programs in place.” It is terrible that schools have a hand in this growing epidemic. Also‚ Spurlock’s Supersize Me documentary shows that “schools are cutting out recess to study for testing and only one state requires physical-fitness classes.” It is terrible
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Virtual Lab: The Cell Cycle and Cancer Worksheet 1. In which phase of mitosis do each of the following occur: a. Centromeres split and chromosomes move toward opposite sides of the cell anaphase b. Chromatin coils to form visible chromosomes prophase c. The nuclear membrane disappears prophase d. Sister chromatids line up in the center of the cell metaphase 2. In which phases of mitosis are sister chromatids visible‚ and attached to each other at the centromere? Prophase
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your ideal work culture is beneficial in every area of the work place. Organization‚ values‚ vision and work language are all‚ different forms‚ of work culture. This essay will examine the work culture; appropriate channels for communications‚ ways to improve the quality of the work culture‚ and steps that can take to create a better work culture. The first question we examine will be how can knowing your ideal work culture help you in determining appropriate channels for communication? Every
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Cell Membrane The Cell Membrane- The cell membrane is a semi-permeable membrane that surrounds the cytoplasm of a cell; the cell membrane is made up of phospholipids‚ proteins and carbohydrates. Its function is to protect the integrity of the interior of the cell allowing certain substances into the cell‚ while keeping other substances out. The phospholipids form a thin‚ flexible sheet while the proteins float in the phospholipid sheet like an ice berg‚ and the carbohydrates extend out from the
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EPIDERMAL CELLS INRODUCTION A living plant cell will shrinks or swells depending on the solute concentration of the cell in relation to the solute concentration of the fluid surrounding the cell (1). It follows that water will move from a region of high water concentration to a region of low water concentration therefore‚ if a cell is placed in a hypertonic solution water will move from the cell into the solution until the cell shrinks(1). Further water loss causes can cause the cells protoplasm
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