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23. A protein that crosses through the cell membrane and is visible on both the interior and exterior surface is known as what type of protein?

17. You are conducting an experiment to determine which type of carbohydrate provides the best  growing conditions for bacteria. You set up 5 growth plates of bacteria. 4 plates each have a different type of sugar, while the 5th plate has no sugar. What is the purpose of the 5th plate in this  experiment? A) It is the independent variable plate B) This plate will grow the most bacteria because of the lack of sugar C) This plate serves as a control plate to compare growth with the sugar plates D) This plate should not grow any bacteria due to lack of sugar

21. Using figure 1A below, identify the organelle which is associated with the modification, packaging, and shipping of protein products from the cell. 

19. Which organelle often takes up much of the volume of a plant cell?

What is the first step in the discovery and recovery of human bodies in forensic biology?

42. Which of the following is not one of the observations made by Charles Darwin as he developed his theory of natural selection and the evolution of organisms?  

15. What results from an equal sharing of electrons between atoms? A) a nonpolar covalent bond B) a polar covalent bond C) an ionic bond D) a hydrogen bond E) a hydrophobic interaction

31. You are conducting an experiment to determine the effect of varying levels of caffeine on high school swimmers. You will be varying the amounts of caffeine consumed by each swimmer 1 hour before swimming a 200 meter race. You have already recorded times for each swimmer at a normal practice, without the use of caffeine supplements for comparison to your results.               Use the information provided to correctly match the variables for this experiment.     

6. Which type of organelle or structure is primarily involved in the synthesis of oils, phospholipids, and  steroids? 

7. Which of the following best summarizes the relationship between dehydration reactions and hydrolysis? A) Dehydration reactions split water molecules and add hydroxyl groups to polymers, and hydrolysis reactions remove hydroxyl groups from polymers. B) Dehydration reactions assemble polymers, and hydrolysis reactions break down polymers. C) Dehydration reactions create monomers, and hydrolysis reactions assemble polymers. D) Dehydration reactions break down polymers, and hydrolysis reactions create monomers.