1. According to Passage 1 , which of the following best explains why muscle cells contain more mitochondria than skin cells? A) Muscle cells store more glucose than skin cells. B) Muscle cells require more energy due to their constant movement. C) Muscle cells have more DNA than skin cells. D) Muscle cells undergo photosynthesis to produce ATP. 2. In Passage 2, which of the following conclusions can be drawn about mitochondrial diseases? A) They only affect cells in the brain. B) They occur when mitochondria fail to produce enough ATP. C) They are caused by defective lysosomes. D) They do not impact high-energy organs like the heart. 3. Based on Passage 1 how are mitochondria and chloroplasts similar in function? A) Both are found in all eukaryotic cells. B) Both generate energy in the form of ATP. C) Both require sunlight to function. D) Both break down waste in the cell. A scientist is studying two groups of muscle cells: square Group 1 has normal mitochondria. square Group 2 has mitochondria that produce 50% less ATP 4. Which of the following hypotheses would be most supported by the results? A) Group 1 cells will contract more effectively than Group 2 cells. B) Group 2 cells will produce more ATP than Group 1 cells. C) Group 1 cells will store more lysosomes than Group 2 cells. D) Group 2 cells will begin performing photosynthesis. 5. Based on Passage 2, if a lysosome stops functioning properly,what would most likely occur? A) The mitochondria would compensate by producing more ATP. B) Waste and cellular debris would accumulate inside the cell. C) The nucleus would take over the lysosome's function. D) The cell would become more efficient at producing glucose. 6. A researcher discovers a new organelle in a eukaryotic cell that appears to store waste but does not break it down. Based on the passages,which existing organelle is this new structure most similar to? A) The nucleus B) The mitochondrion C) A defective lysosome D) A ribosome

## Step 1<br />The first question asks why muscle cells contain more mitochondria than skin cells. The answer is B) Muscle cells require more energy due to their constant movement. This is because mitochondria are the powerhouses of the cell, producing ATP, the cell's main energy currency. Muscle cells require more energy due to their constant movement, hence they contain more mitochondria.<br /><br />## Step 2<br />The second question asks about the conclusion that can be drawn about mitochondrial diseases from Passage 2. The answer is B) They occur when mitochondria fail to produce enough ATP. This is because mitochondrial diseases are caused by defects in the mitochondria, which are responsible for producing ATP.<br /><br />## Step 3<br />The third question asks about the similarity in function between mitochondria and chloroplasts based on Passage 1. The answer is B) Both generate energy in the form of ATP. This is because both mitochondria and chloroplasts are involved in energy production within the cell.<br /><br />## Step 4<br />The fourth question asks about the hypothesis that would be most supported by the results of the experiment. The answer is A) Group 1 cells will contract more effectively than Group 2 cells. This is because Group 1 cells have normal mitochondria, which produce ATP, the energy currency of the cell, more efficiently than Group 2 cells, which have mitochondria that produce 50% less ATP.<br /><br />## Step 5<br />The fifth question asks about what would most likely occur if a lysosome stops functioning properly based on Passage 2. The answer is B) Waste and cellular debris would accumulate inside the cell. This is because lysosomes are responsible for breaking down waste and cellular debris.<br /><br />## Step 6<br />The sixth question asks about the existing organelle that the new structure discovered by the researcher is most similar to. The answer is C) A defective lysosome. This is because the new structure appears to store waste but does not break it down, similar to a defective lysosome.