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عدد المساهمات : 259

مُساهمةموضوع: mcq communty   الأحد يونيو 21, 2009 5:39 pm

Model M.C.Q for fourth year community medicine with answers:

1 - Put ( T
) in front of true. statements and ( F ) in front of the false
ones:



1- Plant proteins are biologically complete ( F )
2-
Cereal proteins are rich in both Lyciene and Thrconine. ( F)
3- A combined
mixture of cereals and pulses is closer to reference protein ( T )
4-
Proteins are important as blood clotting factor and in formation of visual
pigments ( T )
5- All enzymes are protein in nature (T)
6- Proteins lead
to formation of glucose and energy ( T )
7- Negative protein balance occurs
when protein intake exceeds protein output( F )
8- Milk and meat proteins arc
considered as reference proteins ( F )
9- Infants and young children need 1.5
- 2.0 gm/Kg .... (T)
10- glycogen is an animal from of starch stored in liver
(T)
11- Fructose is metabolised to glucose and may be converted to glycogen
or fat ( T )
12- All forms of dietary fibres come form plants ( T )
13-
Dietary fibres are present in all plants and are digested nily in the
intestines( F )
14- Sugars can spare proteins from use as energy as well as
prevent ketosis ( T )
15- Dietary fibres are helpful in slowing glucose
absorption( T )
16- Type 1 diabetes requires insulin therapy whereas in Type
II diabetes the focus is more on did conlrol and exercise ( T )
17- Diet
should be high in complex carbohydrates rather than fat ( T )
I8- Simple
sugars added to food should provide no more than 10% of total energy ( F
)
19- Many foods that are low in suger produce a high glycaemic index ( F
)
20- Fruits and vegetables have a low glycemic index ( T )
21- Typically,
food is of higher fibre diet with low fluids ( F )
22- Adipose cells can
expand abou: 50 times and the body can not form new adipose cells ( F )
23-
Cholesterol forms a part ofcor icosteroids, oestrogen, and testoslerone ( T
)
24- Cholesterol has a critical role in liver, heart, and brain ( T )
25-
Trans fatty acids are a hazardo is form of SFA and predispose to cardiovascular
diseases (F)
26- TfA'S increase LDL and decrease HDL and cholesterol ( T
)
27- Type 2 diabetes is due to enlarged fat cells, poorly bind and poorly
responding to insulin message to the cell ( T )
28-Metabolism of
carbohydrate, fat and protein gives energy ( T )
29- Calories given by
combustion of 1.0 gm CHO or protein gives 4 Calories while that of ( T )
1.0
gm fat gives 9 Calories
30- Energy expenditure is that required for
non-occupational daily activities (T)
31- After the age of 40 years energy
requirement should be reduced by 20 % until the age of 60 years ( F )
32- A,
B, D, E, and K are fat soluble vitamins that are stored mainly in the liver and
fatty tissues (F )

33- Large doses of supplementation with vitamin A, and
D, are toxic to the body( T )
34- Vitamin A is responsible for healthy
epithelium especially in the respiratory and urinary tracts ( T )
35- Vitamin
A is necessary for formation of visual purple which is needed for vision in high
intensity light ( F )
36-Carotenes are found in pigments of most vegetables
and fruits ( T )
37- In vitamin A deficiency the cornea may be involved ( T
)
38- excessive intake of Vitamin A leads to carotinaemla ( T )
39-
Vitamin A deficiency is of public health importance alTecling
preschool and
school children as well as their mothers (T )
40- Vitamin A programme should
be a scpai-alc programme which is concerned with health in order to achieve the
expected prevention ( F )
41- The Bio-availability of vitamin A should be
increased with low fat content diet ( F )
42- There is an interaction between
iron and vitamin A ( T )
43- Vitamin A fortification can be done for sugar,
diary products, fats and wheat flour ( T )
44- Supplementation of mothers
within a month of delivery with 400 l.U. vitamin A single dose is important (F
)
45- Prophylactic vitamin A 100 l.U. in the 9th month and 200 l.U. in the
18th month ( F )
46- Vitamin D is the natural form of vitamin D produced by
irradiation ofdchydro-cholesterol of the skin on exposure to the sun ( T
)
47- White skin are liable to vitamin D deficiency ( F )
48- Vitamin D
deficiency may lead to osteoporosis or osteomalacia ( T )
49- Vitamin E is an
antioxidant which reduces the risk of cancer ( T )
50- Vitamin E is not
affected by storing or cooking (F )
51- Vitamin K is required for synthesis
ofprothrombin in the liver and is incorporated in its molecule ( F )
52-
Vitamin K deficiency occurs in impaired fat absorption as in biliary dysfunction
( T )
53- Thiamine deficiency leads to peripheral neuritis, myocarditis and
encephalopathy ( T )
54- Vitamin B2 is rich in milk, liver, and growing leafy
vegetables ( T )
55- Vitamin B1 is synthesised by bacteria in the large
intestine ( F )
56- Vitamin B1 and niacin is essential in CHO and brain
metabolism ( F )
57- Vitamin B2 deficiency loads to angular stomatitis,
cheilosis, and burning sensation of the eye ( T )

58- folic acid is
important for deyclopment of red blood cells in the bone marrow ( T )
59-
folic acid deficiency leads to appearance of megaloblasts in blood ( T )
60-
Folic acid and vitamin B12 are essential for DNA formation ( T )
61- Vitamin
B12 deficiency occuis when the extrinsic factor is lacking as in gastrectomy ( T
)
62- Ascorbic acid is rapidly destroyed by oxidation and high temperature (
T )
63- Vitamin C is important for folate coenzyme and absorption of iron ( T
)
64- Vitamin C deficiency leads to haemorrhage and delayed wound healing ( T
)
65- Sodium is essential in regulation ofncuromuscular i r r itabilily ( F
)
66- Most of the phosphate in the body is present in bone ( T )
67-
Absorption of calcium is increased by oxalate and decreased by cholecalciferol (
F )

68- Dried fruits are rich in calcium and iron ( T )
69-
Hypervitaminosis D may lead to hypercalcaemia ( T )

70- The body of an
adult contains 3 - 4 gm iron ( T )
71- Selenium helps in immune system and
has an antioxidant role ( T )
72- Copper contributes lo thyroid hormone
metabolism ( F )
73- Some green leaves are a good iodine source ( T )
74-
Fish, cheese and tea are rich sources of fluorine ( T )
75- Ingestion of
large amounts fluorine leads to dental and skeletal fluorosis ( T )
76-
Fluoride levels below 50 mg/litre lead to dental carries ( F )
77- Cigarette
smoking and environmental pollution lead to increase free radicals in body ( T
)
78- Selenium, zinc, and copper control the enzymatic defence against free
radicals ( T )
79- Dietary Vitamin E, C, and B ; reduce the damaging capacity
of free radicals ( T )
80- Some foods contain anti-oxid mt substances e.g.
Soya beans, green tea, fruits, olives, and onion ( T )
81- Oxidative stress
is an imbalarce between pro-oxidants, and antioxidants ( T )
82- Vitamin C is
the most import, int antioxidant in intracellular fluid ( F )
83- Vitamin E,
the water soluble vitamin, is the major antioxidant in all cell membranes ( F
)
84- there is syneigistic effect between vitamin E and C as well as vitamin
E and selenium ( T )
85- Antioxidants may lead to regicssion ofpre-malignant
lesions or inhibit progression of malignancy ( T )

86- Antioxidants
inhibit transformation of HDL to the oxidized form and so reduce cardiac
arrhythmia ( T )
87- Onion, garlic, red, orange, and yellow fruits and
vegetables may reduce cariccr or cardiac disease ( T )
88- Vitamin A and
carotene cross the placenta and if deficient intake they have a
teratogenic
effect ( F )
89- Excessive amount of vitamin D during pregnancy is important
for both mothers and babies (F)
90- Extra amount of 10 mg vitamin C is
recommended for pregnent women to guard aganist pre-eclampsia ( T )
91- The
foetus requires most of its calcium in the first trimester when skeletal growth
is maximised ( F )
92- Iodine deficiency in pregnancy can lead to cretinism
and delayed cognitive function in the new born ( T )
93- Maternal iron
deficiency usually does not result in an anaemic infant at birth ( T )
94-
Iron is a nutrient for which requirement can be met by diet alone ( F )
95-
Colostrum has a relatively high carotene, more protein, sugar, and fat content (
F )
96- Transitional milk occurs between 3rd and 6th day ( T )
97- Protein
content of milk, lactose and fat are firmly established by the end of the 3rd
month ( F )
98- Exclusive breast feeding allows giving the baby different
types of fluids only after the second month ( F )
99- Milk contains
anti-staphylococcus factor which inhibits systemic staphylococcal infection ( T
)
100- Milk contains laclofcrrin which inhibits iron leading lo its decreased
amount ( F )
101- Weaning starts from the 2nd to 6th month, with
supplementary feeding, that is small in amount and gradual ( F )
102- At the
age of one year,the child should receive solid food consisting of pulses,
vegetables, fruits, chicken and milk ( T )


II - Choose one answer
only:


II - Choose one answer only:
Artificial feeding of infants
and pre-school children include all
but one false answer (answer:a)

a-
Dried milk is safer than fresh milk, but it is not adapted to
simulate
human
milk.
b- Buffalo and cow milk are cheaper, more available, but
should be
fresh, safe
and from a safe source.
c- Hypocalcaemia may
occur with the risk ofletany if excessivc dilution of milk occurs.

d-
Iron should be supplemented by the 5th month in the form of
green
vegetable
soup.
e- Protein is given in the form of egg yolk,
minced chicken, and liver.


Ill - One of the following is false:
(answer:a)
-----------------------------------------
a- Deficient protein
and energy in school age leads to marasmus and kwashiorkor
b- Vitamin A
deficiency and B12
c- Dental carries is predisposed by hygienic
lifestyle.
d- Goitre
e- Impaired growth occurs in chronic
deficiencies.

IV - The following is correct about diet in the
elderly,
Except:
(answer:d)
------------------------------------------------------------
-----
a-
Adequate intake of protein, calcium and iron.
b- Supplementation by vitamins
and minerals.
c- Low intake of salts saturated fats, and refined
sugars.
d- Extra amounts of ceirtain diet e.g. eggs, full cream milk, and
cheese.
e- Psychological and medical care.
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مُساهمةموضوع: رد: mcq communty   الجمعة يوليو 03, 2009 3:08 am

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