522. For a normal healthy person, the daily requirement of vitamin C is:

A.   10 to 50 mg                              B. 50 to 100 mg

C.   100 to 200 mg                          D. 200 to 300 mg

517. A 5-year-old child has blue-tinged sclera, hearing loss, and small, slightly blue, misshapen teeth. Radiologic studies confirm the presence of numerous fractures of various ages. No significant degree of bruising is seen over sites of recent fracture. The disease this child most likely has is related to abnormal metabolism involving which of the following substances?

 A.  Collagen 
 B.  Glycogen 
 C.  Mucopolysaccharides 
 D. Purines 
 E.  Tyrosine 

505.A child presents with massive hepatomegaly, hypoglycemia and there is no improvement with glucagon. The probable diagnosis is:

    1.Von Geirke's disease.       

    2.Mcardle      

    3.Cori.      

    4.Forbe.  

485. Thiamine deficiency causes decreased energy production because

 a) It is required for the process of transamination.
 b) It is co-factor in oxidative reduction .
c)It is co-enzyme for transketolase in pentose phosphate pathway .
d) It is co-enzyme for pyruvate dehydrogenase.

Ans-d) It is co-enzyme for pyruvate dehydrogenase.

471.Denaturation of double stranded DNA results in

a.It gets broken down to nucleotides.
b.It becomes single stranded reversibly.
c.Becomes single stranded iireversibly.
d.Becomes double stranded permanently.

Ans-b.It becomes single stranded reversibly.

246.Burning foot syndrome is caused by

a.Vitamin B1
b.Vitamin B2
c.Vitamin B3
d.Vitamin B6

Ans-d.Vitamin B6

245.Burning foot syndrome is caused by

a.Vitamin B2
b.Vitamin B3
c.Vitamin B6
d.Vitamin B2

243.Absobtion of Vitamin B12 takes place through

a.deodenum
b.jejunum
c.Illeum
d.Colon

Ans-c.Illeum

84.Which of the following amino acids would most likely be found on the surface of a protein molecule?

A. Alanine B. Arginine
C. Isoleucine D. Leucine
E. Phenylalanine

The correct answer is B. This question requires two logical steps. First, you need to appreciate that hydrophilic amino acids are more likely to appear on the surface of a protein molecule, whereas hydrophobic amino acids are most likely be found in the interior. Next, you need to figure out which of the amino acids listed is hydrophilic. If you recall that arginine is a basic amino acid that is positively charged at physiologic pH, you should be able to answer this question right away.

All the other choices have neutral side chains and are uncharged at physiologic pH. They would most likely be found in the hydrophobic core of the protein structure. Alanine (choice A), isoleucine (choice C), and leucine (choice D) all have aliphatic side chains; phenylalanine (choice E) and tryptophan have aromatic side chains.

FOR MORE IN DENTISTRY: VISIT

RxDENTISTRY
LOVEHUES
DENTAL MATRIX

71.The vitamin that can be synthesized by microorganisms only:

1. Cobalamine.2. Folic acid.

3. Niacin. 4. None.

ANS. 1

FOR MORE IN DENTISTRY: VISIT

RxDENTISTRY
LOVEHUES
DENTAL MATRIX

56.Lysis of fibrin is brought about by:

A. Plasmin B. Hyaluronidase
C. Collagenase D. Coagulase


Answer is: A- Plasmin. (Ref. K.D. Tripathi-5th )



FOR MORE IN DENTISTRY: VISIT

RxDENTISTRY
LOVEHUES
DENTAL MATRIX

40.Allosteric inhibitors of liver glutamate dehydrogenase includes all except:

1. ATP. 2. GTP.
3. NADH. 4. FADH2

Ans: D ref Satyanarayan -358


FOR MORE IN DENTISTRY: VISIT

RxDENTISTRY
LOVEHUES
DENTAL MATRIX