CHEM 181 Winter 2021/22

Exam practice questions Topic 1 1. Science is all about A. Trials and errors B. Observations and conclusions C. Guesses and theories D. Having as much information as possible E. Making publications 2. Natural sub ...

Exam practice questions Topic 1 1. Science is all about A. Trials and errors B. Observations and conclusions C. Guesses and theories D. Having as much information as possible E. Making publications 2. Natural substances are less dangerous than synthetic substances because A. They do not have anything added to them B. The human body is better used to them C. Humans used to only eat natural substances D. They are not less dangerous, since the origin of a substance does not matter, it is what we know about it that does. E. They have better documentations from scientific experiments than synthetic substances 3. Pomegranates have anti-cancer properties, because they contain A. Natural aromatase inhibitors B. Vitamin C C. Laetrile D. Vitamin B12 E. Folic acid 4. Apricots were exaggerated as curing cancer, because they contain A. Natural aromatase inhibitors B. Vitamin C C. Laetrile D. Vitamin B12 E. Folic acid 5. Flax seeds contain compounds called A. Beta glucan B. Omega 3 fats C. Laetrile 2 ©2018 An Li. All rights reserved. D. Beta carotene E. Estrogen 6. Flax seeds also contain a controversial substance with estrogen like properties called A. Omega 3 fats B. Lignans C. Laetrile D. Beta glucan E. Resveratrol 7. The best Omega-3 fats are found in A. Flax seeds B. Apples C. Fish D. Red meat E. Eggs 8. ________ are the indigestible part of food A. Vitamins B. Minerals C. Trans fats D. Fibers E. Omega-3 fats 9. The type of fats that raise cholesterol levels are called A. Omega-3 fats B. Trans fats C. Polyunsaturated fats D. Omega-6 fatty acids E. Monounsaturated fats 10.________ is a soluble material that lowers cholesterol levels A. Beta glucan B. Beta carotene C. Lignan D. Laetrile E. Fiber 11.How much grams of Beta glucan are needed to reduce cholesterol levels? A. 0.5 B. 1 ©2018 An Li. All rights reserved. 3 C. 3 D. 10 E. 100 12.Enzymes are A. Substances that the human body cannot make B. Life principle in atoms and molecules of every living cell C. Substances that slow down chemical reactions in the body D. Proteins that act as biological catalysts E. Fatty acids with health benefits with anti-inflammatory properties 13.Red wine contains a substance that can reduce the risk of heart diseases named A. Alcohol B. Beta glucan C. Laetrile D. Ligand E. Resveratrol 14.Which of the following is true about mold and preservatives? A. Molds produce a bad variety of toxic compounds B. Preservatives are added in bread so it does not look all moldy C. Any additive added to food has to jump through a bunch of regulatory rules D. Calcium propionate is put in bread as a preservative E. All of the above 15.Super-foods shown in literature as curing and producing miracles are A. Foods rich in vitamins B. Foods that studies have shown to cure a specific disease for all people C. Foods scientifically proven that every person should include in their diet D. Foods that reduce the risk of bone loss E. A misleading concept that does not exist 16.Obesity is A. Linked to heart disease and cancer B. Caused by eating too much fat C. Caused by eating too much sugar D. All of A, B, C E. None of the above 17.Fruit juices in contrast to soft drinks have A. Less sugar 4 ©2018 An Li. All rights reserved. B. More vitamins and minerals C. Less calories D. All of A, B, C E. None of the above 18.Heating food to high temperatures such as by using a barbecue A. Results in the formation of bad compounds for our health B. Results in the formation of good compounds for our health C. Has no impact in the compounds present in the food D. Should always be avoided E. Should be done everyday 19.Eating an average of 60g of processed meat a day A. Increases the risk of colorectal cancer by 10% B. Increases the risk of colorectal cancer by 20% C. Is the accepted limit of daily processed meat without health risks D. Increases the risk of colorectal cancer by 30% E. Increases the risk of colorectal cancer by 50% 20.Which of the following is true about vegetables? A. Eating them once is enough to get significant benefits B. They contain around a dozen beneficial compounds in them C. They can be replaced by vitamin supplements in the diet D. They contain many compounds in them beside vitamins E. 3–4 servings a day of vegetables is recommended 21.Which of the following is true about antioxidants? A. They do not have all the benefits we thought B. It is necessary to take supplements to get enough antioxidants C. Without them calcium is not properly absorbed D. A lack of antioxidants can lead to a terrible disease named Beriberi E. A lack of antioxidants can lead to night blindness 22.Orthorexia nervosa is A. A disorder caused by vitamin C deficiency B. An obsession with eating only the “right” foods C. An obsession with eating only locally grown foods D. A fear of food additives E. A reaction that occurs in people taking too much caffeine 23.What is a plumpy nut? A. A high protein, fat based and peanut based paste that has a long lifetime ©2018 An Li. All rights reserved. 5 B. A type of nut which is the richest nut in selenium C. A type of nut which is rich in Omega-3 D. A type of nut that its contents have been genetically modified E. A special food that is given to anorexics for quick weight gain 24.What is freeganism? A. A movement against the use of animals as food B. A movement for eating only raw and organic food C. A movement for collecting the food that was thrown, but is still good D. A movement for eating only insects E. A movement for making food less expensive and more accessible to people 25.Which of the following statements is false? A. A major issue in food industry is food spoiling B. Food cannot be efficiently distributed to everyone C. Today we have enough food to feed the entire planet D. Food cost is a major issue in food industry in the Western world with people on average in North America allocating over a third of their income for their food E. Close to 40% of crops are destroyed by insects 26.______ are embedded in cellular bilayer, changing molecule A or X to molecule Y A. Enzymes B. Transporters C. Linkers D. Proteins E. Receptors 27.An apple contains what approximate percentage of water? A. 20 B. 35 C. 50 D. 85 E. 98 28.Which of the following statements is false about apples? A. They contain 85% water B. They contain acetone C. They contain ethanol D. Each apple contains approximately 18g of sugar E. All of the above statements are true 6 ©2018 An Li. All rights reserved. 29.Which of the following foods contain the most water? A. Radishes B. Watermelons C. Strawberries D. Cucumbers E. Pineapples 30.Rank the following nutrients from the highest to the lowest according to their cal/g from the following choices (Note: there are two nutrients with the same cal/g value, but there is only one correct ordering from the choices below) A. Fats, carbohydrates, proteins, fibers B. Proteins, fats, fibers, carbohydrates C. Fats, proteins, fibers, carbohydrates D. Carbohydrates, fats, proteins, fibers E. Fibers, carbohydrates, fats, proteins 31.The only micro-nutrient that is found in high enough amount that we measured it in grams is A. Iron B. Calcium C. Selenium D. Iodine E. Zinc 32.Which of the following is the story of Popeye eating spinach? A. A story accurately representing how you can get your muscles to grow only by eating spinach B. Demonstrated that spinach contains 35mg of iron per 100g serving C. Demonstrated that spinach gives 70% of the daily required vitamin A, without the body needing to convert anything D. An urban legend as the body converts the beta carotene into vitamin A, and the normal green color of chlorophyll masks the normal orange color of beta carotene E. An urban legend as spinach does not contain any iron nor vitamin A 33.A short description of important (and/or urgent) current research findings is a A. Note B. Communication C. Review D. Journal E. Full paper ©2018 An Li. All rights reserved. 7 34.A short description of current research findings that are considered less important or urgent is a A. Note B. Communication C. Review D. Journal E. Full paper 35.A complete description of current research findings is a A. Note B. Communication C. Review D. Journal E. Full paper 36.An assignment of subjects that is not controlled by the investigator is called A. Cohort study B. Observational study C. Case control study D. Double blind study E. Blind study 37.Comparing people with a specific condition to other people who are similar except for that condition is called A. Cohort study B. Observational study C. Case control study D. Interventional study E. Blind study 38.Studying a group of people over a long period of time to determine which factors may be associated with the appearance of a specific condition is called A. Cohort study B. Observational study C. Case control study D. Interventional study E. Blind study 39.A study in which the assignment of subjects is controlled by the investigator is called A. Cohort study B. Observational study 8 ©2018 An Li. All rights reserved. C. Case control study D. Interventional study E. Blind study 40.A randomized study in which the people do not know which group has which substance but the researcher does is called A. Cohort study B. Observational study C. Case control study D. Interventional study E. Blind study 41.A randomized study in which the people do not know which group has which substance and not even the researcher knows at first is called A. Cohort study B. Observational study C. Case control study D. Double blind study E. Blind study 42.Which of the following statements is false? A. Frozen vegetables can be more nutritious than fresh vegetables B. Brown eggs are more nutritious than white eggs C. Coffee is the number one source of antioxidants in North America D. 355mL of orange juice contains approximately 34g of sugar, which is the same amount as for 355mL of Coca-Cola E. A functional food is similar in appearance to conventional food, is consumed as part of a usual diet, is demonstrated to have physiological benefits and/or reduce the risk of chronic disease beyond basic nutritional functions 43.Which of the following is consumed more in India than in the US? A. Vegetables B. Fruits C. Rice D. Seafood E. Milk products 44.What is the best definition for simultaneous discoveries? A. Scientific discoveries that are made independently by multiples scientists that occur more or less at the same time ©2018 An Li. All rights reserved. 9 B. Scientific discoveries that happen at the same time by the collaboration of multiple groups of scientists C. Scientific discoveries that are made by a single scientist in multiple scientific fields D. Scientific discoveries that are replicated immediately after the first results, to test their validity E. Scientific discoveries that replace previous scientific discoveries that are proven to be incorrect 45.Which of the following steps is not part of the peer-review process? A. Referee reviews the paper and sends it back to the researcher with comments and points to re-work B. Editor sends paper to referee for review C. Editor makes a decision to publish the paper or send a rejection note to the researcher D. Editor receives paper from researcher, reads it and identifies a referee E. Researcher submits paper to journal 46.Approximately how many research papers are published every year? A. 10000–20000 B. 100000–200000 C. 900000–1000000 D. 1800000–1900000 E. 2900000–3000000 47.________ is a substance or treatment with no active effect A. Soluble fiber B. Insoluble fiber C. Enzyme D. Meta-analysis E. Placebo 48.Which of the following is considered the best source of beta-glucan? A. Apricot pits B. Oat bran C. Flaxseed D. Red wine E. Apples 49.Which of the following has been associated with reduced blood cholesterol? A. Soluble fiber B. Insoluble fiber 10 ©2018 An Li. All rights reserved. C. Omega-3 D. Lignans E. Resveratrol 50.Which of the following foods is a source of fiber, omega-3 fats and lignans? A. Oat bran B. Dried apricot C. Flaxseed D. Pomegranates E. Apples Topic 2 1. Which of the following is true about vitamins? A. Vitamin supplements are necessary, because even a balance diet cannot get the required amount of all vitamins B. Vitamins are nutrients needed in small amounts to prevent deficiencies and diseases C. There are 12 vitamins in the vitamin B group D. There exists a total of 20 vitamins spread into 2 categories of fat soluble and water soluble E. People spend a low amount of money for vitamins and supplements 2. Ascorbic acid is the name for A. Vitamin A B. Vitamin B1 C. Vitamin B12 D. Vitamin C E. Vitamin E 3. Thiamin is the name for A. Vitamin A B. Vitamin B1 C. Vitamin B12 D. Vitamin C E. Vitamin E 4. Niacin is the name for A. Vitamin B1 B. Vitamin B2 C. Vitamin B3 ©2018 An Li. All rights reserved. 11 D. Vitamin B12 E. Vitamin C 5. Folic Acid is the name for A. Vitamin B1 B. Vitamin B3 C. Vitamin B8 D. Vitamin B9 E. Vitamin B12 6. Scurvy is a disease associated with lack of A. Vitamin A B. Vitamin B1 C. Vitamin C D. Vitamin E E. Vitamin K 7. Beriberi is a disease associated with lack of A. Vitamin A B. Vitamin B1 C. Vitamin C D. Vitamin D E. Vitamin K 8. Pellagra is a disease associated with lack of A. Vitamin A B. Vitamin B1 C. Vitamin B3 D. Vitamin B6 E. Vitamin B12 9. Rickets is a disease associated with lack of A. Vitamin A B. Vitamin B1 C. Vitamin B12 D. Vitamin C E. Vitamin D 10.Pernicious anemia is a disease associated with lack of A. Vitamin A B. Vitamin B1 C. Vitamin B12 12 ©2018 An Li. All rights reserved. D. Vitamin E E. Vitamin K 11.Night blindness and weak immune system are deficiencies associated with lack of A. Vitamin A B. Vitamin B1 C. Vitamin B12 D. Vitamin E E. Vitamin K 12.Vitamin B12 is also known as A. Biotin B. Folic acid C. Cobalamin D. Ascorbic acid E. Niacin 13.Contraceptive pills lower which vitamins? A. Fat soluble vitamins B. Most vitamins in the vitamin B group C. Vitamin A and vitamin D D. Vitamin A, vitamin E and vitamin K E. Vitamin A, vitamin D, vitamin E and vitamin K 14.Laxatives lower which vitamins? A. Water soluble vitamins B. Most vitamins in the vitamin B group C. Vitamin A and vitamin D D. Vitamin C E. Has no effects on vitamins in the body 15.Which of the following statements is false? A. All vitamins are amines B. Antibiotics can only cure problems of bacterial origin C. We cannot make our own vitamin C D. Taking folic acid during pregnancy can reduce the risk of malformations for the child E. Sunshine makes a chemical in the human body produce vitamin D 16.Which of the following is false about vitamin A and beta-carotene? ©2018 An Li. All rights reserved. 13 A. An excess of beta-carotene can result in carotenemia, resulting in the skin turning orange B. Beta-carotene in high dose in smokers increases the risk of lung cancer C. Taking more than 10000 IU of vitamin A can result in vitamin A toxicity and death D. Vitamin A is involved in blood clotting E. Pro-vitamin A (or Beta carotenE. can be converted to vitamin A in the body 17.Vitamin C has which of the following side effects? A. Decreases absorption of iron B. Increases absorption of copper C. If taken in excess, it turns the skin orange D. It prevents the oxidation of foods E. If taken in excess, it turns the face red