Exam 1 SC135 spring 2016 Page 1

Transcription

1 xam 1 S135 spring 2016 Page 1 Name: ate: 1 There is a cumulative final in this course. 2 You may use a sentence out of your text book in a concept map. 3 Your PS response pad (aka: clicker) is important for this class because participation grades are based on using them you need them to take and get credit for a quiz you need them to take and get credit for an exam 4 5 How many percentage points are deducted each day an assignment is late? (enter a number) Science is able to support a hypothesis, but science cannot prove it to be true, because all true hypotheses are rejected by the scientific method new experiments may provide additional and/or new data the scientific method is flawed more than one above is correct 6 Science differs from other disciplines in that it relies on making observations rational thought testable statements drawing conclusions 7 Your television won't turn on, and you speculate that a circuit breaker in the house has been tripped. In scientific terminology, such reasoning would best be described as forming conclusions from the results of experiments controlling variables in a repeated manipulation of nature developing an observation based on an hypothesis developing a hypothesis based on an observation testing a prediction generated from a hypothesis 8 ancer is a singular kind of disease is a specialized tissue is characterized by cells that divide uncontrollably is 2/24/2016 9:06:50 M

2 xam 1 S135 spring 2016 Page 2 9 y knowing that 72,000 US citizens will develop bladder cancer this year, you know something about the of cancer. prevalence incidence oncology epidemiology 10 Which of the following is characteristic of cancer cells? F uncontrolled growth lack response to stop signals are immortal can divide an infinite number of times can recruit a food supply 11 scientific study follows a group of people from birth through death and determines that those that smoke have a higher incidence of lung cancer. This is an ecologic study an in vivo study a cohort study a case control study 12 n "in vivo" study is a laboratory study is done using live organisms can be used to study aspects of cancer 13 The study of cancer is called metastasis cancer biology oncology none of the above 14 study showed that 100% of people that ate chocolate covered pickles developed bladder cancer. This study proved that pickles cause bladder cancer. 2/24/2016 9:06:50 M

3 xam 1 S135 spring 2016 Page 3 15 cologic, case-control and laboratory studies are all categories of meta-analysis epidemiological studies controlled trials laboratory studies 16 In a controlled trial to determine if broccoli prevents lung cancer, the subjects that receive the placebo are called the intervention group. 17 In a double blind study all of the following are true XPT the subjects being tested do not know which treatment they are getting the people administering the treatment do not know which subjects are getting each treatment some subjects get a placebo in place of a treatment the person running the research does not know which subjects are getting each treatment 18 In your experiments with paper towels, the independent variable was the paper towel brands the amount of water absorbed the rate at which water was absorbed the temperature of the water 19 scientist performed an experiment on paper towel absorbency for 3 brands of paper towels. She took a piece of towel 1cm x 1cm of each brand. She placed each piece in a beaker containing 10ml of water for 10 seconds. Then she removed the paper towel and let it drip for 10 seconds. Finally, she measured the volume of water in the beaker and subtracted it from the starting 10 ml to determine the volume of the water absorbed. She repeated this test 3 times for each brand of paper towel. possible null hypothesis for this experiment is One brand of paper towel absorbs a greater volume of water than another. ll brands of paper towel absorb the same volume of water. One brand of paper towel absorbs water faster than another. ll of these statements are valid hypotheses for this experiment. 20 One controlled variable in the experiment in number 18 (above) is The size of the paper towel. The brand of the paper towel. The volume of water absorbed by the paper towel. The null hypothesis. ll of the above. 2/24/2016 9:06:50 M

4 xam 1 S135 spring 2016 Page 4 21 The first step in the scientific method is making a prediction testing a hypothesis proving an answer making an observation 22 n atom is in its most stable state when all of its electron shells are filled to capacity. 23 neutron has charge no a negative a positive Given that sodium (Na) has an atomic number of 11 and an atomic mass of 23, how many neutrons does sodium have? (answer by entering a number) Given that chlorine has an atomic number of 17 and an atomic mass of 35, a neutral atom of chlorine has how many valence electrons? (answer by entering a number) Given the information in number 22 above, chlorine is likely to form a cation an anion covalent bonds none of the above 27 Which of the following phrases best describes a covalent bond? Weak temporary bonds are formed toms combine their nuclei toms share protons toms share electrons 28 Which bond is between atoms? F G covalent ionic hydrogen a and b a and c b and c a, b and c 2/24/2016 9:06:50 M

5 xam 1 S135 spring 2016 Page 5 29 onds within a chemical compound are the result of the behavior of protons neutrons electrons 30 Ions dissolve in water 31 Water "wets" things because it is polar it is composed of hydrogen and oxygen it has hydrogen bonds 32 Fatty acids can bond together to each other to form long chains. 33 Glucose is an example of a monosaccharide an amino acid a fatty acid 34 In the diagram, the functional group shown is hydroxyl amino carboxyl phosphate 2/24/2016 9:06:50 M

6 xam 1 S135 spring 2016 Page 6 35 How many atoms of oxygen are in lactose? (the chemical formula is shown) Peptide bonds form between glycerol molecules fatty acids monosaccharides amino acids 37 Which of the following is NOT a kind (category) of organic molecules carbohydrates lipids proteins sulfur compounds 38 arbon dioxide (shown in the picture) is an organic molecule. 39 The functional group found in all organic acids is hydroxyl amino phosphate carboxyl acidic 2/24/2016 9:06:50 M

7 xam 1 S135 spring 2016 Page 7 40 The monomer of carbohydrates is amino acid fatty acid monosaccharide nucleotide peptide 41 The order of amino acids in a polypeptide chain is known as the structure primary secondary tertiary quaternary 42 Which part of the phospholipid (pictured) is hydrophilic? 43 Polysaccharides contain carboxyl groups. 44 Water is attracted to the part of a molecule. hydrophilic hydrophobic 45 You test an unknown food item in the lab using enedict's reagent. fter boiling the food with the reagent for 2 minutes, the color of the contents of the tube turn brick red. From these results, you conclude that the food is a monosaccharide starch lipid protein 2/24/2016 9:06:50 M

8 xam 1 S135 spring 2016 Page 8 46 Which test would you NOT do for a lipid? biuret test solubility in polar and nonpolar solvents sudan red test 47 Simple sugars (monosaccharides) react with Lugol's iodine. 48 Individual organisms can evolve. 49 ll of the following are characteristics of life XPT reproduce built of cells have loving relationships sense the environment 50 The primary function of the flower you saw in lab was capturing energy sexual reproduction response to the environment evolution 2/24/2016 9:06:50 M

9 xam 1 S135 spring 2016 Page 9 nswer Key : xam 1 S135 spring 2016 Question: nswer 5 (+/- 0%) F 12 (+/- 0%) 7 (+/- 0%) 2/24/2016 9:06:50 M

10 xam 1 S135 spring 2016 Page /24/2016 9:06:50 M