BIOL 1010 - Practice Lab Exam Questions Fall 2019 PDF

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BIOL 1010 Lab Exam Information and Practice Questions Fall 2016 Because lab is all about reasoning, applying your knowledge, and drawing conclusions based upon observations and measurements, you can expect the questions on the lab portion of the midterm and final exams to be of this type. Purely factual-recall questions will be rare; instead, you will need to draw upon what you know to determine the best answer from the choices available. The simple questions that make up your online pre-lab quizzes are not good examples of the kinds of questions you will encounter on the lab exam. The midterm exam will include questions related to labs 1 and 2, while the final exam will include questions related to labs 4-8. To prepare for the lab questions, first carefully review each lab, particularly the Laboratory Activities section of each lab. Then you will need to test your knowledge to make sure that you know the material. We have provided some sample practice questions below to give you an idea of the kind of questions you can expect on the lab section of your exams. As well, each lab begins with a set of Learning Objectives: these are the things that you should be able to do after completing the lab, and the exam questions are designed to test whether you can in fact do these things. So, you can treat the learning objectives as another set of test questions. When preparing for your exam, it’s important to remember that simply reading over your labs isn’t nearly enough: reading over your labs is the initial review that you need to do in order to start really studying, and good studying involves finding ways to practice and test your understanding. When studying, do not try to remember the exact amounts of materials (e.g. how many mL of buffer, how many seconds it took) you used in labs. When studying procedures, focus on what you did, in what order, and why. You should be prepared to use any formulas that you worked with in lab, and to identify any structures that everyone was expected to observe in lab. Practice Questions Lab 1 1. If you observed a cell with obvious cell walls that contained circular green structures and a single, clear oval structure, which of the following would you label as the nucleus? a) b) c) d)

The round green structures The clear oval structure Both a) and b) Neither a) nor b)

2. Which of the following would be the “best” candidate for Question of the Week,. Remember that the question of the week should be able to be tested with a scientific study. a) What happens to the bacteria in yogurt when you eat it? b) What are the black dots on or in the cheek cells? c) Do larger Vallesneria cells contain more chloroplasts than smaller Vallesneria cells? d) What is the best microscope for studying diatom movement?

Answers: 1. d) is correct. The round green structures are chloroplasts because they are green and there are many of them, so they are not the nucleus. We can’t be certain that a clear round structure is the nucleus. So neither would be labeled as the nucleus. 2. c) is correct. You could count the number of chloroplasts in a group of large cells, then count the number of chloroplasts in small cells and compare those results. a) is too vague. What do we mean by “what happens?” What would we measure? b) Is more of a factual question. The knowledge that we have indicates they are probably bacteria, so there is nothing here to test with a scientific study. d) this is a “tech” question. You are merely asking what is the best technology to do the job. It is not the type of question that could be answered with scientific study nor would it lead to new knowledge about nature. Lab 2 1. When observing an unlabeled sample of cells, you notice two cells that both have visible nuclei and no cell walls. One of the cells is much larger than the other cell, and has a very round shape, while the other, smaller cell is more elongated and oval-shaped. Which of the following is the best conclusion to draw about these cells? a) These cells show no variability: based upon the presence of nuclei and the absence of cell walls, both are animal cells. b) One cell is more variable than the other cell due to its larger size. c) The cells show variability in both size and shape. d) One of the two cells is abnormal, which is why it is not round like the other cell.

2. Your class has collected length measurements of a group of twenty-five animal cells and a group of twenty-five plant cells. You find that the mean length for the animal cells is 0.02 mm and the mean length for the plant cells is 0.03 mm. Which of the following should you conclude based upon these measurements? a) The group of plant cells has a larger mean length than the group of animal cells, but from this data you cannot tell which group has the greater variability. b) The group of plant cells is more variable overall than the group of animal cells, due to the larger mean. c) The group of plant cells is more variable in length than the group of animal cells, due to the larger mean. d) The group of plant cells has a larger mean length than the group of animal cells, due to the fact that the plant cells have thick cell walls. Answers: 1. c) is correct. 2. a) is correct. For each of these questions, make sure that you can explain why the correct answer is correct, and what makes each incorrect option incorrect....