BSC 1005 Midterm Exam - Questions and Answers

BSC 1005 Midterm Exam - Questions and Answers Facilitated diffusion across a biological membrane requires _____ and moves a substance _____ its concentration gradient. Transport proteins Down. The act of a white blood cell engulfing a bacteruim is _____. Phagocytosis An enzymes function is dependent on its ______. Shape. Diffusion ______. Proceeds until equilibrium is reached. Which of the following processes could result in the net movement of a substance into a cell, if the substance is more concentrated in the cell than in the surroundings? Active Transport. Which of the following is a measure of randomness in a system? Entropy. Diffusion is an example of ______. Passive transport. A rock at the top of a mountain contains ______ energy. Potential. Which of the following are true? A) Most enzymes are lipids. B) An enzyme's function is unaffected by antibiotics. C) Enzymes are the reactants in a chemical reaction. D) Enzymes catalyze specific reactions. E) An enzyme's function requires inhibitors. If placed in tap water, an animal cell will undergo lysis (refers to the breaking down of the membrane of a cell) Whereas the plant cell will not. What accounts for the difference? The relative inelasticity and strength of the plant cell wall. Read the following scenario to answer the following question(s). Cellular respiration converts the energy of fuel molecules to a form of energy that a cell can use to perform work. In an average day, most adult humans need to consume about 2,000 Calories to maintain their health. However, the exact amount of dietary Calories a person needs depends upon many factors, including the person's age, physical activity, size, and health. Foods that we consume vary greatly in their nutritional content and quality. A large hard-boiled egg, for example, has about 75 dietary Calories and contains about 70% of our recommended daily intake of cholesterol. Molecules that come from the food we eat provide energy for the amazing work that goes on inside of our cells. This energy, stored inside of our food, is a form of ______. Potential energy called chemical energy. When two solutions that differ in solute concentration are placed on either side of a selectively permeable membrane, and osmosis is allowed to take place, the water will ______. Exhibit a net movement to the side with lower water concentration. Which of the following parts of a cell is (are) most likely the shipping center of a company? the Gogli apparatus. Which of the following is a function of the Gogli apparatus. Protein modification. Vacuoles are _____. Membranous sacs. Cellular respiration can be described as the conversion of the energy _____. Stored in food molecules to energy stored in ATP. Which organelle is responsible for photosynthesis? Chloroplast. Read the following scenario to answer the following question(s). The earliest cells detectable in fossils were different from the cells in animals, plants, fungi, and protists living today. These first prokaryotic cells gave rise to eukaryotic cells approximately 1.7 billion years ago. The structure of eukaryotic cells today suggests how they might have evolved from their prokaryotic ancestors. Scientists examining mitochondria and chloroplasts now think that these organelles were probably free-living prokaryotes before becoming a part of eukaryotic cells long ago. Which of the following is a characteristic of chloroplasts that suggests that they might have evolved from free-living bacteria?