Question.263 - Question 1 10?/ 10?pts Phoebe and her friends made the observations below. Match the observation to the characteristic of life displayed.? Phoebe carefully cuts a thin slice of an oak leaf and observes it under a microscope. She sees that the leaf is actually made of millions of tiny units. ? ?? ?? ?? ?? ? Billy plants an acorn in the soil outside of his school. After a week or so, Billy notices a small green shoot emerging from the ground where he planted the acorn. A few weeks later, the shoot is twice as tall as it first was and has produced several leaves. ? ?? ?? ?? ?? ? Jaime performs experiments with oak seedlings and finds that the leaves of the oak seedling absorb sunlight and carbon dioxide. Jaime determines that the oak tree uses the sunlight and carbon dioxide to produce chemicals that give the oak seedling the energy it needs to live and grow. ? ?? ?? ?? ?? ? As autumn approaches and the air grows cooler, Susie observes that the leaves of an oak tree turn brown and then fall to the ground. As spring arrives and the air gets warmer, she sees new green leaves emerging from the branches of the oak tree. ? ?? ?? ?? ?? ? Misha notices that in the spring, the oak trees in her neighborhood are covered with tiny flowers and the air is filled with oak pollen. Misha observes that after a week or two, tiny acorns have begun to develop from the flowers. Misha knows that these acorns might one day become new oak trees. ? ?? ?? ?? ?? ? ? Question 2 10?/ 10?pts Which of the following elements would have four valence electrons?? ?? helium? ?? carbon? ?? beryllium? ?? oxygen? ? Question 3 10?/ 10?pts Match the complex molecule to the type of biomolecule.? DNA ? ?? ?? ?? ?? ? polypeptide? ?? ?? ?? ?? ? triglyceride? ?? ?? ?? ?? ? cellulose? ?? ?? ?? ?? ? ? Question 4 10?/ 10?pts Your cell membrane is fluid. The molecules move around. Some molecules move through the cell membrane. Some don't. To function appropriately, your cell membrane cannot be too rigid. Which answer below describes how your diet can affect the functioning of your cell membrane?? ?? If you eat a lot of unsaturated fats, your membrane will be too rigid because the unsaturated fats are straight and stack tightly. ? ?? If you eat a lot of saturated fats, your membrane will not be too rigid because the saturated fats are straight and can't stack tightly. ? ?? If you eat a lot of unsaturated fats, your membrane will not be too rigid because the unsaturated fats are bent and can't stack tightly. ? ?? If you eat a lot of saturated fats, your cell membrane will be extremely fluid because the saturated fats are not able to stack closely due to their bent structure. ? ? IncorrectQuestion 5 0?/ 10?pts Blood is a mixture that contains cells suspended in plasma. The plasma is mostly water. Click the following that are likely true.?? ?? Sugars are dissolved in the watere. ? ?? Water is the universal solvent, so everything dissolves in water ? ?? Molecules that are charged will dissolve in water. ? ? Question 6 10?/ 10?pts Which of the following would be hydrophobic? Click all that apply.? ?? polar covalent compound ? ?? nonpolar covalent compound ? ?? ionic compound ? ? Question 7 10?/ 10?pts What are the end products of cellular respiration after all three steps are complete? Click all that are correct.? ?? CO2 ? ?? H2O ? ?? ATP ? ?? C6H12O6 ? ?? NADH ? ?? O2 ? ? Question 8 10?/ 10?pts Why do you have to eat? Click any that you would include in your answer. ?? The glucose from the food bonds with cellular proteins and releases energy to make the protein function. ? ?? There is chemical energy trapped in the bonds of the food molecules. ? ?? Your cells utilize the chemical energy from the food to produce ATP. ? ?? Your cells break down your food to release stored chemical energy. ? ? IncorrectQuestion 9 0?/ 10?pts Why do you have to breathe? Click any that you would include in your answer. ?? Oxygen is required as the final electron acceptor of the electron transport chain. ? ?? Carbon dioxide buildup is required to trigger the production of ATP. ? ?? Oxygen is required for the breakdown of glucose in the cytoplasm. ? ?? Oxygen is required for the production of NADH during pyruvate oxidation. ? ? Question 10 10?/ 10?pts Arsenic disrupts the production of ATP from ADP. Why would this characteristic cause arsenic to be a potent poison? ?? ADP competitively inhibits most of the proteins involved in the basic functioning of the cell ? ?? If ATP builds up in the cell, it makes the cell too acidic for the cell to function. ? ?? A table of answers and brief statistics regarding student answer choices. Answer Text Number of Respondents Percent of respondents selecting this answer Answer Distribution If ADP builds up in the cell, it makes the cell too acidic for the cell to function., (Incorrect answer)If ADP builds up in the cell, it makes the cell too acidic for the cell to function. ? ?? If ATP stops being produced, then cells lack the energy to function ?

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