c. Chloroplasts d. Lysosomes 5. Which of the following is not a component of the cell membrane a. Phospholipids b. Proteins c. Nucleic acids d. Carbohydrates 6. Transport across the cell membrane that requires energy is known as a. Diffusion b. Facilitated diffusion c. Active transport d. Endocytosis 7. During which state of the cell cycle does a cell duplicate its genetic material? a. Gap 1 b. Gap 2 c. Synthesis d. Mitosis 8. Which of the following statements about enzymes is true a. Enzymes
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AS Biology - Unit 1 ------------------------------------------------- Metabolism Metabolism is a term to describe all reaction which is taking place within a cell and is separated into two types which are * anabolic = compounds being built up * catabolic = compounds being broken down ------------------------------------------------- Water The water molecule is a molecule which is made up from 2 hydrogen atoms and 1 oxygen atom. It is bounded by 2 covalent bonds and has is polar.
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(2014). Everything You Ever Wanted to Know About Cell Membranes. [online] About. Available at: http://biology.about.com/od/cellanatomy/ss/cell-membrane.htm [Accessed 1 Oct. 2014]. Bailey‚ R. (2014). Spread Out and Make Yourself Comfortable with Diffusion. [online] About. Available at: http://biology.about.com/od/cellularprocesses/ss/diffusion_3.htm [Accessed 2 Oct. 2014]. Bailey‚ R. (2014). What Are Lysosomes‚ and What ’s Their Function in Your Body?. [online] About. Available at: http://biology
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Using dialysis tubing to model diffusion of a cell membrane and investigating the influence of solute concentration on osmosis Purpose * Discover how dialysis tubing diffuses the cell membrane * Explore the effect of solute concentration on osmosis Background A cell membrane is a very significant function in the human body. In one sense‚ it is used as a barrier to keep the enzymes‚ DNA‚ and metabolic pathways that bundles everything together. Cell membranes are also used as a gateway
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This week we explore a number of important concepts in Chapter 5 concerning energy and how reactions are facilitated in cells. In this conference please provide a brief description of one of the following topics: What is energy? The capacity to cause change‚ or to move matter in a direction it would not move if left alone. A child pushing a ball‚ the energy is transferred from the muscle of the child to the ball forcing the ball to move. What is kinetic energy? The energy of motion‚ moving
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solid mechanics‚ or even the study of dynamic movement of bodies and forces‚ fluid mechanics posed a problem for many scientists. This was mainly due to the amorphous nature of fluids. The study of forces on solid structures and objects is somewhat facilitated by the fact that sturdy structure of sample manages to retain its original shape and volume even though it is exposed to minute external forces that the researcher cannot control. However‚ for fluids‚ even the most insignificant gust or the slightest
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peoples‚ altering the native culture (A). Specifically‚ increased Muslim contact was established along the eastern coast through Indian Ocean trade (E). Jewish communities also developed and assimilated into European civilizations. Ultimately‚ the diffusion of culture was observable as Africa was increasingly infiltrated by Islam‚ through both military mobility and trade expeditions.
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which causes the carrier protein to change shape in a way that the molecule is released inside the membrane. This occurs in facilitated diffusion where molecules move from a region of high concentration to a region of low concentration‚ using no external energy. The membrane size can also affect the rate of diffusion. The thicker the membrane‚ the slower the rate of diffusion. Osmosis the movement of water movement form a high to low concentration through a semi-permeable membrane. The cell has a
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will be administratively dropped from the course Describe the structure of the plasma membrane. How does its structure relate to its function? Explore diffusion as a method of cell transport. What are the factors affecting cell diffusion? Osmosis and what it means for the life of a cell Case study – group work What is facilitated diffusion? Describe the impact of cell size on cell transportation. Administrative drop deadline is September 17 EXAM 1 2- 3- Sept 8 3 Sept10 4-
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Session 1 We use the scientific method every day. Imagine your car doesn’t start one morning before school. Which of these is a reasonable hypothesis regarding the problem? I’m out of gas. A scientific theory explains what we know to this date about a natural event. Which of the following is a theory? There is molecular and biochemical evidence that all organisms are related. Choose the answer that best describes the sequence of the scientific method. observation‚ hypothesis‚ experiment‚ conclusion
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