Biomolecules & Enzymes
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | biochemical reactions
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| show | chemical
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| show | activation energy
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| Sometimes a chemical reaction must ___ energy for the reaction to start; often, but not always, this energy is in the form of ___. | show 🗑
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| show | Energy
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| show | temperature
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| ___ (a measure of the acidity of a solution) in most organisms needs to be kept within a very narrow range | show 🗑
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| ___ within an organism are used to regulate pH so that pH homeostasis can be maintained. | show 🗑
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| show | cell processes
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| A ___ is a substance that changes the rate of a chemical reaction or allows a chemical reaction to occur (activate) at a lower than normal temperature. | show 🗑
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| Catalysts work by lowering the ___ ___ of a chemical reaction. | show 🗑
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| show | consumed, altered
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| show | Enzymes
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| Enzymes are very ___. Each particular enzyme can catalyze only one chemical reaction by working on one particular ___ (substrate). | show 🗑
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| ___ are involved in many of the chemical reactions necessary for organisms to live, reproduce, and grow, such as digestion, respiration, reproduction, movement and cell regulation. | show 🗑
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| show | temperature, pH
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| All organisms are composed of organic molecules which contain ___ atoms. | show 🗑
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| Not all organic molecules have the same amount of ___ available for use by the organism. | show 🗑
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| show | caloric value
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| show | Proteins
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| show | Amino acids
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| There are ___ amino acids that chemically bond in various ways to make proteins. | show 🗑
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| ___ amino acids are made in the body; others must be consumed from foods such as ___, ___, or ___. | show 🗑
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| ___ are most important as a source of building blocks. | show 🗑
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| show | carbohydrates
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| show | carbohydrates
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| show | sugars and starches
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| ___ and ___ are molecules composed of carbon, hydrogen, and oxygen. | show 🗑
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| show | simple sugars
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| ___ are important because they are the main source of energy for the cell | show 🗑
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| show | photosynthesis
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| show | digestion
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| show | bloodstream, cell membrane
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| show | cellular respiration
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| show | carbon-hydrogen
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| If an organism has a greater supply of carbohydrates than needed for its energy requirements, the extra energy is converted to ___ and stored by the body. | show 🗑
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| Lipid molecules are made of two component molecules (___ and ___) so they are structurally different from carbohydrates. | show 🗑
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| show | carbohydrates
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| show | fats
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| Once inside the cell, glycerols and fatty acids are ___ for later use or used as fuel for ___ ___ if there are no carbohydrates available. | show 🗑
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| The process of cellular respiration releases the ___ that is held in the chemical ___ of the glycerol and fatty acid molecules. | show 🗑
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| show | Fats
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| show | structure, number
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| show | Proteins
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| Proteins can function as an energy source only if there is a shortage of ___ or ___ . | show 🗑
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| ___ ___ are used as raw materials to make all of the proteins required by the organism. | show 🗑
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| ___ is a chemical reaction that breaks the bonds of organic molecules so that the component parts can be transported throughout the body by the bloodstream. | show 🗑
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| show | Structural
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| show | Transport
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| ___ proteins coordinate body activities such as insulin which regulates the amount of sugar in the blood. | show 🗑
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| show | Contractile
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| ___ proteins accelerate the speed of chemical reactions such as those that break down food in the digestive tract. | show 🗑
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| show | energy, structural
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| show | carbohydrates
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| show | cellulose
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| For most animals, foods that contain cellulose are important as ___ which stimulates the digestive system. | show 🗑
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| ___ provide long-term energy storage, cushion vital organs, and insulate the body. | show 🗑
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| show | cell membranes
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Created by:
Ms. Phillips
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