Mid Term Questions 1-8

.docx

School

South Texas College *

*We aren’t endorsed by this school

Course

1408

Subject

Biology

Date

Dec 6, 2023

Type

docx

Pages

8

Uploaded by UltraProton9047

LAB 1 & 2 Quizzes If you wear, contact lenses in the school laboratory: Notify your instructor that you wear contact lenses. After completing an experiment, all chemical waste should be disposed of according to your instructor's directions . In the pill bug experiment, the substance used as the control was sand. MSDS stands for Material Safety Data Sheet, TRUE. Approved eye protection devices such as googles are worn in the laboratory, anytime chemicals including water heat or glassware are used. If you do not understand the direction of part of a lab procedure, you should: ask the instructor before proceeding. A tentative explanation for some observation or some phenomenon is known as a hypothesis. Completely closed-toed shoes are encouraged but not necessary, FALSE. List in the correct order the steps in the Scientific Method: Observation, Hypothesis, Prediction, Experiment, Data/Results, Conclusion. When gathering glassware and equipment, for an experiment, you should Read all directions carefully to know what equipment is necessary. Examine all glassware to check for chips or cracks. Clean any glassware that appears dirty. *All the answer choices are correct*
Lab 2 Metric Measurement Quiz The basic measurement of ma ss is GR AM . Match the following statements with their corresponding temperatures. Freezing point of water 0 °C Normal body temperature 37 °C Water boils 100 °C Room temperature 20-25 °C The l iter is a unit of vo l ume. Remember that in science we always use the metric system and therefore your temperatures should be Celsius. When measuring any powdered chemicals using an electronic balance, one must first tare the weight of the weighing boat. TRUE Which prefix is the sma ll est, mi ll i. The basic m easurement length is m eters.
Lab 3 Chemical Composition of Cells The Biuret Test identifies what type of macromolecules, Proteins. For how long should the samples be heated when testing the presence of simple sugars? 3 minutes Below are the results of a mock Benedict test performed in the lab. Match the letter with the corresponding result of the test. A. No reducing sugars (Blue) B. Trace amounts of reducing sugars. (Green) C. Moderate amounts of reducing sugars (Orange) D. High amounts of reducing sugars. (Red) In the paper test, the paper turns translucent and gets a grease spot in the presence of lipids, TRUE. Which test would you use to test for presence of lipids, Paper Test. What color indicates a positive result for presence of proteins, Dark-blue purple. Which of the following tests required the samples to be heated, Benedict Test. Water is used as a sample for all your experiments, this is because water serves as negative control. The Benedict Test identifies what type of macromolecule, monosaccharides. What kind of macromolecule is albumin, Protein.
Your preview ends here
Eager to read complete document? Join bartleby learn and gain access to the full version
  • Access to all documents
  • Unlimited textbook solutions
  • 24/7 expert homework help