Q: When does coal release most of its energy? Read this paragraph and choose the correct option from the provided answers: To prepare coal for use, the coal is first crushed into powder and burned in a furnace. Like other fuels, coal releases most of its energy as heat when it burns. The heat from the burning coal is used to boil water. This makes steam. The steam spins turbines, which creates electricity. Choices: - when forming - when compressed - when falling - when burning A:
when burning

Q: What shape is the colony of a volvox cell? Read this paragraph and choose the correct option from the provided answers: Volvox Colony. Volvox cells live in a colony shaped like a hollow ball. The cells of the colony may be connected by strands of cytoplasm and can function together. For example, the whole colony can swim from one place to another as one. Choices: - pyramid - coil-shaped - tubular - hollow ball shaped A:
hollow ball shaped

Q: Eukaryotic cells are cells that contain what? Read this paragraph and choose the correct option from the provided answers: Eukaryotic cells are cells that contain a nucleus. Choices: - inorganic matter - energy - pathogens - a nucleus A:
a nucleus

Q: Enzymes, proteins, electron carriers, and pumps that play roles in glycolysis, the citric acid cycle, and the electron transport chain tend to catalyze reactions that are what? Read this paragraph and choose the correct option from the provided answers: Control of Catabolic Pathways Enzymes, proteins, electron carriers, and pumps that play roles in glycolysis, the citric acid cycle, and the electron transport chain tend to catalyze non-reversible reactions. In other words, if the initial reaction takes place, the pathway is committed to proceeding with the remaining reactions. Whether a particular enzyme activity is released depends upon the energy needs of the cell (as reflected by the levels of ATP, ADP, and AMP). Glycolysis The control of glycolysis begins with the first enzyme in the pathway, hexokinase (Figure 7.19). This enzyme catalyzes the phosphorylation of glucose, which helps to prepare the compound for cleavage in a later step. The presence of the negatively charged phosphate in the molecule also prevents the sugar from leaving the cell. When hexokinase is inhibited, glucose diffuses out of the cell and does not become a substrate for the respiration pathways in that tissue. The product of the hexokinase reaction is glucose-6-phosphate, which accumulates when a later enzyme, phosphofructokinase, is inhibited. Choices: - continuous - reversible - changeable - non-reversible A:
non-reversible