I. Make observations and ask a quest… Show more What is the correct sequence of steps in the scientific method? I. Make observations and ask a question II. Analyze the data III. Develop a hypothesis IV. Share the results with other scientists V. Design and perform an experiment to test the hypothesis A) I>II > III > IV > V B) III > I > V > II > IV C) V> IV > III > II > I D) I> III > V >II > IV E) V > II > I > III > IV 2. You have formulated a hypothesis: %u201CApples contain more vitamin C than oranges.%u201D To test your hypothesis you measure vitamin C levels in 20 oranges and 20 apples from trees that were grown in the same orchard under the same environmental conditions (temperature, rain, sunlight). This experiment was conducted twice. The control in the experiment is A) type of soil, temperature, amount of rain and sunlight in the orchard B) vitamin C levels C) oranges D) apples E) a large sample size and repeated experiment ***Use the following information to answer questions 3, 4 below***: A group of medical researchers investigated the effects of Drug X on lowering cholesterol levels in a group of men between the ages of 50 and 70 years old. The researchers did the following experiment and obtained the indicated results: One group of 150 men took a tablet containing Drug X for 3 weeks %u2013 95 of these men decreased their cholesterol levels by at least 10% (three men from this group dropped out of the study). Another group of 150 men was given a tablet with no added Drug X for 3 weeks %u2013 10 of these men decreased their cholesterol levels by at least 10% (two men from this group dropped out of the study). 3. Which of the following is the best hypothesis for this experiment? A) Will drug X lower cholesterol levels in men between the age of 50 and 70 years? B) Drug X will lower cholesterol levels in men. C) Since high cholesterol levels significantly increases several health risks for men, drug X is most likely beneficial. D) Men between the age of 50 and 70 years will have reduced cholesterol levels if they take drug X over a 3 week period. E) There is no significant difference in cholesterol levels between men that take drug X and those that don%u2019t take it. 4. Which of the following was the control group in this experiment? A) the amount of Drug X contained in the tablet B) the number of participants in each group at the end of the experiment C) the group of participants that received tablets containing Drug X D) the group of participants that received tablets that did not contain Drug X E) the number of participants in each group at the beginning of the experiment 5. Where does the oxygen gas produced during photosynthesis come from? A) water B) ATP C) carbon dioxide (CO2) D) glucose E) the atmosphere 6. Which of the following are polysaccharides? A) RNA and DNA B) Glucose and sucrose C) Cholesterol and vegetable oil D) Glycogen and starch E) Adenine and thymine 7. A chemotherapy drug affects the enzyme DNA polymerase. In which part of the cell cycle does it inhibit cell division? A) Metaphase B) S phase C) G1 D) Cytokinesis E) Prophase 8. Which by-product of photosynthesis was important in altering the atmosphere of the earth so that aerobic organisms could evolve? A) air B) methanegas C) nitrogen D) carbondioxide E) oxygen 9. The majority of climate scientists believe that the current change in climate is caused predominantly by ________. A) an enhancement of the greenhouse effect B) a decreased reliance on fossil fuels for energy C) a thinning of the ozone layer D) a melting of the polar ice caps E) an increase in solar radiation 10. The liver cells of an animal have 24 chromosomes. How many chromosomes would you expect in this same animal? A) 6 B) 12 C) 24 D) 36 E) 48 11. You are taking a cruise from California to Hawaii. About halfway there the ship begins to sink. You are able to board a lifeboat, but now you are floating in the ocean waiting to be rescued. After several days you are so thirsty that you bend over the side of the boat and drink lots of salty seawater. What happens to your body? A) You throw up because sea salt is toxic to humans. B) You get thirstier because of osmosis. C) Salt diffuses into your cells, water follows, your cells start to expand and you feel bloated. D) Since sea water consist of 96.5% fresh water (and only 3.5% salt) you will feel much better. E) You get dehydrated because water is unable to cross the semi-permeable membranes of your cells. 12. You are spraying your garden with a pesticide and you accidentally swallow a small amount. You read on the package that this pesticide inhibits ATP synthase. Should you be worried? A) ATP synthase is part of the light dependent reaction in photosynthesis; this pesticide will therefore not affect humans. So don%u2019t worry! B) ATP synthase is an enzyme involved in the citric acid cycle so all animals, humans included, will be affected. Call the doctor. C) ATP synthase found in the pesticide is a very toxic compound. Call the doctor. D) ATP synthase is involved in both photosynthesis and cellular respiration. Call the doctor. E) ATP synthase inhibitors will not affect humans, but there might be other toxic ingredients in the pesticide, so it is best to call the doctor to be on the safe side. 13. In the following chemical reaction, what is carbon dioxide (CO2)? 12 H20 + 6 CO2 -> 1 glucose molecule + 6 O2 A) substrate B) product C) enzyme D) activation factor E) independent variable 14. Which of the following is NOT a feature of DNA? A) Adenine (A) forms a base pair with thymine (T) B) Complimentary strands are anti-parallel, running in opposite directions C) Complimentary strands are held together by hydrogen bonds between phosphate groups D) Nucleotides within a single strand are connected by covalent bonds E) All of the above are features of DNA 15. A man who carries a harmful sex-linked gene on his X chromosome, will pass the gene on to A) All of his daughters B) Half of his daughters C) All of his sons D) Half of his sons E) All of his children • Show less