Sign In

Quick Biochemistry - Mineral Metabolism (Section 7)

1
Which condition hinders the uptake of iron?
Answer
(A)
In the presence of achlorhydria
2
What is the approximate daily iron need for an adult male?
Answer
(C)
10 mg
3
What is the approximate daily iron need for a woman of reproductive age?
Answer
(D)
20 mg
4
Which of the following is NOT a significant source of iron?
Answer
(A)
Milk
5
From which food group is iron absorption comparatively higher?
Answer
(D)
Organ meats
6
Approximately what percentage of iron is absorbed from a standard diet?
Answer
(B)
5-10%
7
A lack of iron generally leads to which type of anemia?
Answer
(B)
Microcytic anaemia
8
Long-term, severe iron deficiency can result in epithelial atrophy in which of the following?
Answer
(D)
All of these
9
Which statement about bronzed diabetes is FALSE?
Answer
(A)
It is caused by excessive intake of copper
10
What is the approximate total iodine content in the body of a typical adult?
Answer
(C)
45-50 mg
11
Approximately how much iodine, in milligrams, is typically found in the thyroid gland of a fully grown individual?
Answer
(C)
10-15 mg
12
What is the approximate daily iodine intake, in micrograms, that is recommended for an adult?
Answer
(C)
150 µg
13
In which of the following situations is the use of iodized salt generally advised?
Answer
(D)
In regions where goiter is prevalent
14
Which of the following statements about goiter that is common in a specific area is false?
Answer
(C)
It ultimately causes an overactive thyroid
15
What is the approximate total amount of copper, in milligrams, found within the body of a typical adult?
Answer
(C)
100 mg
16
What is the typical range for plasma copper concentration?
Answer
(C)
100-200 µg/dl
17
What condition can be caused by a deficiency of copper?
Answer
(D)
Microcytic anaemia
18
What is the approximate daily requirement of copper, in milligrams, for adults?
Answer
(C)
2.5 mg
19
Which of the following statements about ceruloplasmin is incorrect?
Answer
(C)
It is produced in the intestinal lining
20
Which of the following statements about Wilson's disease is incorrect?
Answer
(D)
Plasma copper levels are elevated
21
Regarding Menke's disease, which of the following is accurate?
Answer
(C)
Plasma copper is increased in it
22
Approximately how much zinc is present in the body of an average adult?
Answer
(C)
1.5-2.0 gm
23
What is the typical range for plasma zinc levels?
Answer
(B)
50-150 µg/dl
24
Which of the following enzymes requires zinc to function as a cofactor?
Answer
(B)
Alkaline phosphatase
25
Zinc plays a role in the process of storing and releasing which of the following substances?
Answer
(D)
Insulin
26
The absorption of zinc in the intestines is hindered by the presence of which of the following?
Answer
(D)
All of these
27
What is the recommended daily intake of zinc for a typical adult?
Answer
(C)
15 mg
28
In which of the following conditions is zinc deficiency frequently observed?
Answer
(D)
Menke's disease
29
Which mineral deficiency can lead to hypogonadism?
Answer
(C)
Zinc
30
Impaired wound healing can be a consequence of a deficiency in which mineral?
Answer
(C)
Zinc
31
Which of the following deficiencies is most closely associated with hypochromic microcytic anemia?
Answer
(B)
Copper
32
Approximately how much manganese is needed daily by adults?
Answer
(B)
2-5 mg
33
Which enzyme(s) require molybdenum to function correctly?
Answer
(D)
All of these
34
Which element plays a role in protecting the body against cellular damage from free radicals?
Answer
(A)
Selenium
35
Which of the following enzymes contains selenium as a key component?
Answer
(B)
Glutathione peroxidase
36
Which nutrient's demand is reduced by the presence of selenium?
Answer
(D)
Vitamin E
37
What is the highest acceptable concentration of fluorine allowed in drinking water?
Answer
(C)
1.2 ppm
38
What is the recommended maximum daily intake of fluoride?
Answer
(D)
3 mg
39
What percentage of an adult's body weight is typically composed of water?
Answer
(C)
60% of body weight
40
How many joules are approximately equivalent to 1 kcal?
Answer
(C)
4.2 KJ
41
What is the approximate calorific value of proteins, as measured by a bomb calorimeter?
Answer
(C)
5.4 kcal/gm
42
Why is the calorific value of proteins lower in a living person compared to a bomb calorimeter?
Answer
(D)
Proteins are not completely oxidized in living persons
43
What is the approximate calorific value of alcohol?
Answer
(C)
7 kcal/gm
44
Which method(s) can be used to assess a person's energy expenditure?
Answer
(D)
Direct or indirect calorimetry
45
What is the approximate respiratory quotient for carbohydrates?
Answer
(D)
1.0
46
What is the approximate respiratory quotient for fats?
Answer
(B)
0.7
47
What is the approximate respiratory quotient for proteins?
Answer
(C)
0.8
48
What is the approximate respiratory quotient for an average mixed diet?
Answer
(D)
0.85
49
At a respiratory quotient of 0.85, approximately how many kcal of energy are expended per liter of oxygen consumed?
Answer
(B)
4.825 kcal
50
What is the approximate BMR of healthy adult men?
Answer
(C)
40 kcal/hour/square metre