The oxygen in our atmosphere is produced byġ4. The movement of molecules from a region of low concentration across a membrane to a region of high concentration by use of ATP energy isġ3. Prokaryotic cells, with no nucleus or membranous organelles, are found inĪ) package proteins for secretion from cellĬ) are sites of oxidation of glucose to generate ATPĪ) a single layer of phospholipid moleculesī) a double layer of phospholipid molecules in which proteins are embeddedĬ) several layers of protein and carbohydrate moleculesĭ) a triple layer of phospholipids and carbohydratesġ2.
Fats contain more energy per gram than carbohydrates or proteins becauseĪ) fat molecules contain a lower percentage of oxygen atomsī) fat molecules contain a lower percentage of hydrogen atomsĬ) fat molecules contain a lower percentage of carbon atomsĭ) fat molecules contain a higher percentage of adipose atomsĨ. Which of these types of molecules contain nitrogen?ħ. This polysaccharide forms fibers that are a major component of plant cell walls:Ħ. If you place the probe of a pH meter in lye or sodium hydroxide (NaOH), it will read pH 14. A chlorine atom has 17 protons, 18 neutrons, and 17 electrons. Which of the following includes all the others?ģ.
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