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will you please check my answers for my dental assistant exam?

1. Which one of the following vitamins is known as niacin or
nicotinic acid and assists in the normal functioning of the
digestive and nervous systems?
A. A C. B2
B. K D. B3

I said D

2. Which one of the following, in excessive amounts, can cause
mottled tooth enamel?
A. Riboflavin C. Calcium
B. Thiamin D. Fluoride

I said D

3. Which one of the essential nutrients is most likely to cause
dental caries?
A. Carbohydrates C. Minerals
B. Fats D. Proteins

I said A

4. What is the primary cause of dental disease?
A. Calculus C. Plaque
B. Soda consumption D. Nutrition

I said C

5. Which of the following essential nutrients is known as vitamin A and is important for
night vision and health of the eyes?
A. Retinol C. Folic acid
B. Niacin D. Ascorbic acid

I said A

6. Which vitamin has been shown to have an important role in wound healing and
maintaining healthy gums?
A. Folic acid C. Biotin
B. Calciferol D. Ascorbic acid

I said D

7. What is the amount of fluoride concentration in water that’s considered safe for the
prevention of dental decay?
A. 2 parts per million C. 0.5 part per million
B. 1 part per million D. 0.25 part per million

I said B.

8. What is the best time of day to use a disclosing agent?
A. Before breakfast C. After breakfast
B. After lunch D. At bedtime

I said D.

9. What is the recommended daily dosage of fluoride (in a prescribed supplement) for a
child over three years of age living in an area where the drinking water is free of
fluoride?
A. 0.25 mg C. 0.1 mg
B. 0.5 mg D. 1.0 mg

I said B.

10. How long does it take for plaque to renew itself on the tooth surfaces?
A. 12 hours C. 24 hours
B. 10 hours D. 20 hours

I wasn't sure at all on this one.

11. Which one of the following statements concerning snacks is correct?
A. Children shouldn’t snack between meals.
B. Sweet fruit isn’t a good choice for a snack.
C. Soda is more apt to cause caries than a chewy chocolate chip cookie.
D. Between-meal snacks are more likely to cause dental caries than regular meals.

I said D

12. What is the name of the mechanical process that breaks up food in the stomach?
A. Peristalsis C. Chewing
B. Churning D. Digestion

I said D.

13. What is the minimal rate at which the body must produce energy to continue its essential
life processes?
A. Basal metabolic rate C. Metabolism
B. Basal metabolic need D. Anabolism

I wasn't sure on this one.

14. Which essential nutrients have the highest calories per gram?
A. Proteins C. Alcohol
B. Fats D. Carbohydrates
15. Which one of the following does not contain calories?
A. Alcohol C. Water
B. Protein D. Carbohydrate

I said C

16. What essential nutrient can increase urinary excretion of calcium if consumed
in excess?
A. Vitamin D C. Protein
B. Vitamin C D. Magnesium

I said D

17. Which of the following contains monounsaturated fat?
A. Peanut oil C. Sunflower oil
B. Cottonseed oil D. Soybean oil

I said A

18. Which one of the following essential minerals is important in tooth development?
A. Iron C. Potassium
B. Phosphorus D. Magnesium

I said B

19. Which nutrient is the most abundant in the body?
A. Proteins C. Carbohydrates
B. Fats D. Water

I said D

20. Dental assistant A says a child’s first dental visit should be around the age of 4, when
children start to brush their own teeth. Dental assistant B says a child’s first visit
should be around the age of 2. Which assistant is correct?
A. Dental assistant A
B. Dental assistant B
C. Both are correct.
D. Neither is correct.

I said B

If you know if any/or all are wrong or right please let me know :]

Thanks so much!