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Nasolabial cyst is thought to arise from:

  # Nasolabial cyst is thought to arise from:
A. Remnant of cell rest of Serres
B. Remnant of cell rest of Malassez
C. Remnant of cell rest of embryonic lacrimal duct
D. Maxillary sinus lining epithelium



The correct answer is C. Remnant of cell rest of embryonic lacrimal duct.

Nasolabial cyst is a very uncommon cyst which forms outside the bone in the soft tissues, deep to the nasolabial fold. It probably arises from the lower end of the nasolacrimal duct and is occasionally
bilateral. It presents over a wide age range, mostly in middle-aged adults, and much more commonly in females. The cysts form soft tissue swellings in the upper lip, distort the nostril and cause pressure resorption of the anterior maxilla if large. 

Buccal cusp of maxillary tooth placed lingual to the lingual cusp of mandibular posterior teeth is referred to as:

 # Buccal cusp of maxillary tooth placed lingual to the lingual cusp of mandibular posterior teeth is referred to as: 
A. Buccal occlusion
B. Buccal non occlusion
C. Lingual non occlusion
D. Lingual occlusion



The correct answer is C. Lingual non occlusion.



The standard probing depth, which requires referral to periodontist, at the time of evaluation of phase 1:

 # The standard probing depth, which requires referral to periodontist, at the time of evaluation of phase 1: 
A. 5 mm 
B. 6 mm 
C. 7 mm 
D. 8 mm 



The correct answer is A. 5 mm.

Pocket depth of 5 and above should be referred to a periodontist.

The deficiency of which of the following nutrients is well tolerated by humans?

 # The deficiency of which of the following nutrients is well tolerated by humans?
A. Carbohydrate
B. Lipid
C. Protein 
D. Vitamins



The correct answer is A. Carbohydrate.

Carbohydrates are the polyhydroxyaldehydes or ketones, or campounds which produce them on hydrolysis. The term sugor is applied to carbohydrates soluble in water and sweet to taste. Carbohydrates are the major dietary energy sources, besides their involvement in cell structure and various other functions.

Carbohydrates are broadly classified into 3 groups- monosaccharides, oligosoccharides, and polysaccharides. The monosacchsrides are further divided into different categories based an the presence of functional groups (aldoses or ketoses) and the number of carbon atoms (trioses, tetroses, pentases, hexoses and heptoses).

Glyceraldehyde (triose) is the simplest carbohydrate and is chosen as a reference to write the configuratian of all other monasaccharides (D- and L- forms). If two monosaccharides differ in their structure around a single carbon atom, they are known as epimers. Glucose and galactose are C4-epimers. 

Maltose which is produced as a breakdown product of starch is:

 # Maltose which is produced as a breakdown product of starch is:
A. Monosaccharide
B. Disaccharide
C. Trisaccharide
D. Polysaccharide



The correct answer is B. Disaccharide.

Sucrose, lactose and maltose are disaccharides.
Sucrose = Glucose + Fructose
Lactose = Galactose + Glucose
Maltose = Glucose + Glucose


Which of the following is a monosaccharide?

 # Which of the following is a monosaccharide? 
a. Galactose 
b. Lactose 
c. Maltose 
d. Sucrose 


The correct answer is A. Galactose.

Sucrose, lactose and maltose are disaccharides.
Sucrose = Glucose + Fructose
Lactose = Galactose + Glucose
Maltose = Glucose + Glucose




In the plasma membrane, glycolipids are usually situated in:

 # In the plasma membrane, glycolipids are usually situated in:
a. Cannot be predicted, it varies according to the cell types. 
b. Inner leaflet of plasma the membrane. 
c. Outer leaflet of the plasma membrane. 
d. Evenly distributed in both outer and inner leaves of plasma membrane. 


The correct answer is C. Outer leaflet of the plasma membrane.

Glycolipids are found on the outer leaflet of cellular membranes where it play not only a structural role to maintain membrane stability but also facilitates cell to cell communication acting as receptors, anchors for protein and regulators of signal transduction. Cell surface carbohydrates play major roles in cell substrate recognition in oncogenesis, cell adhesion in metastasis.