Quiz-Biochemistry, Marks Medical Biochemistry

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Marks Medical Biochemistry

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  • Biochemistry 14Mar2009

    DO NOT DISTRIBUTE - 1 -

    1 Metabolic Fuels and Dietary Components

    1) A 23-year-old presents for a consult about weight reduction. She works as a corporate

    sales consultant for popular womens clothing. At 5 feet 7 inches tall, she weights 99 lbs

    and is very afraid she could weight over 100 lbs. Her daily exercise routine includes one

    hour of jogging every morning and one hour of walking every evening. Which of the

    following is the most likely problem afflicting this patient?

    a) Anorexia

    b) Depression

    c) Obesity

    d) Malnutrition

    e) Hypothyroidism

    2.1) One calorie is equal to:

    a) 4.18 Calories

    b) 4.18 kilocalories

    c) 4.18 kilojoules

    d) 4.18 Joules

    e) 4.18 calories

    2.2) Physicians tend to use units of calories, in part because that is what their patients use

    and understand. Food calories are actually Calories. How many calories are in a

    Calorie?

    a) 10,000

    b) 1,000

    c) 100

    d) 10

    e) 1

    3.1) When fat is completely oxidized from CO2 to H20, how much fuel energy is

    generated (in kcal/g)?

    a) 2

    b) 4

    c) 7

    d) 9

    e) 11

    3.2) An analysis of a patients diet shows they ate 90g carbohydrate, 10g protein, and 10g

    fat each day. Approximately how many calories did this patient consume in one day?

    a) 440

    b) 470

    c) 490

    d) 740

    e) 940

    3.3) Glucose, which is the predominant sugar in human blood, is a:

    a) Monosaccharide

    b) Disaccharide

    c) Polysaccharide

    d) Triacylglycerol

    e) Linear chain of amino acids

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    DO NOT DISTRIBUTE - 2 -

    3.4) Which of the following accounts for the difference in energy between fats and

    carbohydrates/proteins?

    a) Nitrogen

    b) Water

    c) Hydrogen

    d) Ammonia

    e) Oxygen

    4) Other than adipose tissue, which of the following is a primary fuel store in the body?

    a) Protein

    b) Glucose

    c) Alcohol

    d) Glycogen

    e) Triacylglycerol

    5.1) For Body Mass Ratio (BMR), what is the assumed value of kcal/day/kg body

    weight?

    a) 1

    b) 12

    c) 24

    d) 36

    e) 72

    5.2) What is the BMR for an average 70kg person?

    a) 70 * 1 = 70 kcal/day

    b) 70 * 12 = 840 kcal/day

    c) 70 * 24 = 1,680 kcal/day

    d) 70 * 36 = 2,520 kcal/day

    e) 70 * 72 = 5,040 kcal/day

    6) Which of the following is NOT a significant factor that affects BMR?

    a) Pregnancy

    b) Thyroid status

    c) Body temperature

    d) Age

    e) Race

    7.1) Which of the following Daily Energy Expenditure (DEE) hourly activity factors is

    used for moderate activity, such as hoeing?

    a) 1.0

    b) 1.5

    c) 2.5

    d) 5.0

    e) 7.0

    7.2) For a 60-year-old female, the BMR equation is 10.5W+596. Which of the following

    equations would be used for this 50kg patient if she spent her entire day lying in bed?

    a) (10.5 * 50 + 596) * 1.0

    b) 10.5 * 50 * 1.0 + 596

    c) (10.5 * 50 + 596) * 1.5

    d) 10.5 * 50 * 1.5 + 596

    e) 10.5 * 50 + 596 + 1.0

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    DO NOT DISTRIBUTE - 3 -

    8) Which of the following equations would be used for the previous patient if she spent 8

    hours a day standing and 16 hours a day lying in bed?

    a) 10.5 * 50 * 1.0 * 1.5 + 596

    b) 10.5 * 50 * 1.0 + 596

    c) 10.5 * 50 * (8 *1.5 + 16 * 1.0) + 596

    d) (10.5 * 50 + 596) * (8 *1.0 + 16 * 1.5)

    e) (10.5 * 50 + 596) * ((8 *1.5 + 16 * 1.0) / 24)

    9) What is the DEE hourly activity factor for a 70kg, 25-year-old male who works heavy

    labor 6 hours a day, does moderate exercise for 3 hours, sleeps for 7 hours, and sits

    upright in a chair watching sports TV for the rest of the time?

    a) (6 * 7.0 + 3 * 2.5 + 7 * 5.0 + 8 * 1.5)

    b) (6 * 7.0 + 3 * 5.0 + 7 * 1.0 + 8 * 1.5) / 24

    c) (6 * 7.0 * 3 * 5.0 * 7 * 1.0 * 8 * 1.5) / 24

    d) (6 * 5.0 + 3 * 2.5 + 7 * 1.0 + 8 * 1.5) / 24

    e) (6 * 5.0 * 3 * 2.5 * 7 * 1.0 * 8 * 1.5) / 24

    10) What is the overall DEE activity factor for a 24-year-old male who does 1.5 hours of

    heavy activity (weight lifting and Judo), 1 hour of moderate activity (racquetball), 1.5

    hours of light activity, 16 hours of very light activity, and 4 hours of sleep?

    a) (1.5 * 7.0 * 1 * 5.0 * 1.5 * 2.5 * 16 * 1.5 * 4 * 1.0)

    b) (1.5 * 7.0 + 1 * 5.0 + 1.5 * 2.5 + 16 * 2.0 + 4 * 1.0) / 24

    c) (1.5 * 7.0 + 1 * 5.0 + 1.5 * 2.5 + 16 * 1.5 + 4 * 1.0) / 24

    d) (1.5 * 5.0 + 1 * 3.0 + 1.5 * 2.5 + 16 * 1.5 + 4 * 1.0) / 24

    e) (1.5 * 7.0 + 1 * 3.0 + 1.5 * 2.5 + 16 * 1.5 + 4 * 1.0) / 24

    11.1) Which of the following equations is the English equivalent for Body Mass Index

    (BMI), from the metric equation weight/height^2 (kg/m^2)?

    a) (weight * 2.2) / (height^2)

    b) (weight) / (height^2) + 704

    c) (weight) / (height^2) + 504

    d) (weight * 704) / (height^2)

    e) (weight * 504) / (height^2)

    11.2) What is the BMI for a 100kg person that is 175cm tall?

    a) 100 / (0.175^2)

    b) 100 / (1.75^2)

    c) 100 / (17.5^2)

    d) 220 / (0.175^2)

    e) 220 / (1.75^2)

    12) If someones daily energy expenditure matched their daily caloric intake and they

    worked out two full hours a day, what type of caloric balance would they have?

    a) Positive (gain weight)

    b) Neutral

    c) Negative (lose weight)

    13) For a 35-year-old male, the BMR equation is 11.6W+879. If a 120kg 35-year-old

    male patient did light work for one hour a day, very light work for fifteen hours a day,

    and slept for the rest of the day, what would his DEE be?

    a) (11.6 * 120 + 879) * (8 * 1.0 + 15 * 1.5 + 1 * 2.5) / 24 = 3122

    b) (11.6 * 120 + 879) + (8 * 1.0 + 15 * 1.5 + 1 * 2.5) / 24 = 2272

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    DO NOT DISTRIBUTE - 4 -

    c) (11.6 * 120 + 879) * (8 * 1.0 + 15 * 2.5 + 1 * 5.0) / 24 = 4778

    d) (11.6 * 240 + 879) * (8 * 1.0 + 15 * 1.5 + 1 * 2.5) / 24 = 5036

    e) (11.6 * 240 + 879) + (8 * 1.0 + 15 * 1.5 + 1 * 2.5) / 24 = 3664

    14) If the above 120kg 35-year-old male patient ate an average of 585g of carbohydrates,

    150g of protein, and 95g of fat each day, what is their kcal/day?

    a) 585 * 4 + 150 * 9 + 95 * 4 = 4070

    b) 585 * 7 + 150 * 4 + 95 * 4 = 5075

    c) 585 * 9 + 150 * 4 + 95 * 4 = 6245

    d) 585 * 4 + 150 * 4 + 95 * 7 = 3605

    e) 585 * 4 + 150 * 4 + 95 * 9 = 3795

    15) Which of the following is true for the above 120kg 35-year-old male patient

    regarding their caloric balance?

    a) Positive

    b) Neutral

    c) Negative

    16) If a patient consumes an excess of 100 kcal/day (about 8 ounces of full-sugar soda)

    for an entire year, about how much weight would he/she gain?

    a) ((100 * 365) / 4) / 1000 / 2.2 = 4lbs

    b) ((100 * 365) / 9) / 1000 / 2.2 = 2lbs

    c) ((100 * 365) / 4) / 1000 * 2.2 = 20lbs

    d) ((100 * 365) / 9) / 1000 * 2.2 = 9lbs

    e) ((100 * 365) / 9) / 100 * 2.2 = 90lbs

    17) Which of the following dietary requirements is usually divided into electrolytes?

    a) Water

    b) Vitamins

    c) Minerals

    d) Essential fatty acids

    e) Proteins

    18) Which of the following dietary requirements is involved in nitrogen balance?

    a) Essential fatty acids

    b) Vitamins

    c) Minerals

    d) Carbohydrates

    e) Proteins

    19.1) Which of the following is NOT a nutritionally essential fatty acid (derived from

    plant oils or derived from fish oils)?

    a) !-linoleic acid

    b) !-linolenic acid

    c) "-lipoic acid

    d) Eicosapentanoic acid (EPA)

    e) Docosahexaenoic acid (DHA)

    19.2) Which of the following is NOT a nutritionally essential amino acid?

    a) Lysine

    b) Leucine

    c) Threonine

    d) Asparagine

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    DO NOT DISTRIBUTE - 5 -

    e) Valine

    19.3) Which of the following is NOT a nutritionally essential amino acid?

    a) Histidine

    b) Proline

    c) Methionine

    d) Phenylalanine

    e) Tryptophan

    20.1) A deficiency in which of the following would lead to dark spots on the skin, spongy

    gums, and sunken eyes (scurvy)?

    a) Choline

    b) Biotin

    c) Folate

    d) Thiamin

    e) Vitamin C

    20.2) A deficiency in which of the following would lead to a bright red tongue and

    pigmented rash in areas exposed to sunlight (pellagra)?

    a) Riboflavin

    b) Vitamin C

    c) Niacin

    d) Folate

    e) Vitamin B12

    20.3) A deficiency in which of the following would lead to edema, anorexia, weight loss,

    apathy, and confusion (beri-beri)?

    a) Vitamin D

    b) Vitamin K

    c) Niacin

    d) Thiamin

    e) Vitamin B12

    20.4) A deficiency in which of the following would lead to inadequate bone

    mineralization (rickets)?

    a) Vitamin C

    b) Vitamin A

    c) Vitamin D

    d) Vitamin E

    e) Vitamin B6

    20.5) A deficiency in which of the following would lead to keratinization of the GI

    epithelium, night blindness, and failure to produce tears (xerophthalmia)?

    a) Vitamin C

    b) Vitamin A

    c) Vitamin D

    d) Vitamin E

    e) Vitamin B6

    21) Which of the following is NOT

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