SCIENCE, TECHNOLOGY, AND SOCIETY
Organophosphates (organic compounds containing phosphate groups) are commonly used as insecticides to improve crop yield. Organophosphates typically interfere with nerve signal transmission by inhibiting the enzymes that degrade transmitter molecules. They affect humans and other vertebrates as well as insects. Thus, the use of organophosphate pesticides poses some health risks. On the other hand, these molecules break down rapidly upon exposure to air and sunlight. As a consumer, what level of risk are you willing to accept in exchange for an abundant and affordable food supply? Explain your thinking.
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Campbell Biology in Focus (2nd Edition)
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Microbiology with Diseases by Taxonomy (5th Edition)
Seeley's Anatomy & Physiology
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- The function of proteins is limited to one or two tasks. Proteins play multiple roles in living things. Match the functions of proteins to their corresponding descriptions. 1. signaling proteins 2. structural proteins 3. sensory proteins 4. regulatory proteins 5. motor proteins a. help cells move throughout the body b. turn genes on and off c. involved in cellular communication d. can detect light, heat, and sound e. proteins that help strengthen cells, tissues, and organsarrow_forwardMany compounds taste sweet to humans. Sweet taste results when a molecule binds to the sweet receptor, one type of taste receptor, on the surface of certain tongue cells. The stronger the binding, the lower the concentration required to saturate the receptor and the sweeter a givenconcentration of that substance tastes. The standard free-energy change, ΔG°, of the binding reaction between a sweet molecule and a sweet receptor can be measured in kilojoules or kilocalories per mole.Sweet taste can be quantified in units of “molar relative sweetness” (MRS), a measure that compares the sweetness of a substance to the sweetness of sucrose. For example, saccharin has an MRS of 161; this means that saccharin is 161 times sweeter than sucrose. In practical terms, this is measured by asking human subjects to compare the sweetness ofsolutions containing different concentrations of each compound. Sucrose and saccharin taste equally sweet when sucrose is at a concentration 161 times higher than…arrow_forwardWhich of the following is true of oxytocin? Multiple Choice The paraventricular nuclei are neurons where oxytocin is synthesized. Phenylalanine and arginine are the amino acids present in oxytocin. Oxytocin is essential for water conservation throughout life. Oxytocin is not a polypeptide.arrow_forward
- Number 4 pleasearrow_forwardElectromagnetic Spectrum Ultra-Violet Infra-Red Light Light Short Waves Long Waves Visible Light You can see that visible light is only a very small slice of the electromagnetic spectrum. An important feature of electromagnetic energy is that shorter waves have more energy than longer waves. This is the key to understanding why only a narrow segment of waves in the electromagnetic spectrum is ideal for biological reactions like photosynthesis and vision. Some people humorously refer to this idea as the "Goldilocks" principle-the wavelength has to be "just right." The energy waves just shorter than violet light are called ultra- violet, and the waves just longer than red light are called infra-red. Ultra-violet waves are damaging to life. These waves have too much nergy waves can be • strong or too weak life as we know it. The molecules exposed to ultra-violet waves become over-activated and are chemically changed or destroyed. When molecules are exposed to infra-red waves, they are…arrow_forwardNutrition has been one of the major problems that our country is facing most specially in this time of pandemic. As one of the trusted chemists of the Local Government Unit you were tasked to make an ideal meal plan that will serve as a “meal guide’ for families in preparing their daily meals. Your food pyramid must show the BIOMOLECULES of life for each level (GO, GROW, GLOW and FLOW foods). You must also show sample computations of carbohydrates that will take place once the specific food in the food group is digested, this is to show your audience an evidence on how important your food pyramid is. You must present your work using a multimedia presentation. In line with this task, the following must be prepared: list of biomolecules in your meal plan; (TEST 1) computation of chemical reaction that will take place once digestion happened; (TEST 2) narrative/description that will explain and convince your reader on the importance of your food pyramid. (PRESENTATION –…arrow_forward
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- 0000 Refer to figure 1D of the Science Article. Which produces the greatest inhibition of PDE (phosphodiesterase activity) D PDE activity (percent inhibition) 80 40 IBMX (•): 3-isobutylmethylxanthine, synthetic Caffeine (A): naturally present in plants Theophylline (o): naturally present in small amounts in tea and cocoa beans, used to treat asthma 8-phenyltheophylline (0): synthetic, works by a different mechanism. 0 0.001 0.1 0.01 Methylxanthine (mM) IBMX Caffeine Theophylline 8-phenyltheophylline 1.0arrow_forwardWhat is meant by a binding site? Select one: The area of a macromolecule target that is occupied by a chemical messenger when it binds The area of a macromolecule target that is occupied by a drug when it binds The area of a macromolecule target that is occupied by an agonist when it binds All the answers are correctarrow_forwardWhen energy is absorbed by a molecule, it can trap some of the energy within the molecule by altering its structure. Therefore, in some cases there has been evolutionary development of enzymatic activity that can return the molecules to their original, functional states. On the other hand, in other cases the absorption of energy may be so great that no reversion to the original state can occur Which one of the following is example to this (no reversion is possible)? Select one: a.Conversion of 11-cis form of retinal to the all-trans form of retinal upon exposure to light, with a maximum abspance at 500 nm. b. Thymine-thymine and thymine-cytosine pyrimidine bridges formation upon exposure of DNA to UV-B radiation. c. The absorbance of radiant energy by Melanın pıgment in the skin. d. The translucent to opaque converSion of egg whites when cooked by increasıng the temperature.arrow_forward