NEET MDS Shorts
70112
MicrobiologyColonies of E. coli serotype O157:H7 appear on Mac Conkey Sorbitol Agar as colourless colonies non-sorbitol fermenter. Others E. coli, sorbitol fermenters, give red colonies and gram-negative non-sorbitol fermenters appear translucent.
32648
Oral Medicine
The combination of fever, vomiting, and diarrhea with seizures in a young child is more indicative of gastroenteritis, which can cause dehydration and electrolyte imbalances leading to seizures, rather than the other options listed.
68924
Oral Pathology
The parakeratinised type of odontogenic keratocyst (OKC) is significantly more common than the orthokeratinised type, making up the vast majority of cases.
91543
Orthodontics
SOLUTION
11780
General Medicine
Both the aPTT (activated Partial Thromboplastin Time) and PT (Prothrombin Time) are prolonged in the case of factor VIII deficiency, which is characteristic of Hemophilia A. This is because factor VIII is involved in both the intrinsic and common pathways of the coagulation cascade.
13192
INI CET
The Groper appliance is an anterior space maintainer designed for esthetics and functional restoration, replacing lost anterior teeth in pediatric patients.
29561
Dental Materials
The essential ingredients of the dental inlay investment employed with the conventional gold casting alloys are a-hemihydrate of gypsum, quartz, or cristobalite, which are allotropic forms of silica.
38980
Oral PathologyMigraine is basically vascular in origin, involving vasodilation and inflammation of cranial blood vessels, particularly the trigeminal vascular system. The pathophysiology involves changes in cerebral blood flow and release of vasoactive substances. MPDS is muscular, glossopharyngeal neuralgia is neurologic, and glossodynia is often idiopathic or related to local factors rather than vascular.
39706
Biochemistry
Epinephrine, also known as adrenaline, is a hormone and neurotransmitter that
is synthesized in the body from the amino acid tyrosine. Tyrosine is a
non-essential amino acid, which means that it can be synthesized in the body
from phenylalanine, another essential amino acid. The synthesis of epinephrine
occurs in two main steps:
1. Hydroxylation of tyrosine: Tyrosine is converted into dihydroxyphenylalanine
(DOPA) by the enzyme tyrosine hydroxylase. This is the rate-limiting step in the
synthesis of epinephrine.
2. Decarboxylation and further hydroxylation: DOPA is then decarboxylated to
form dopamine, which is further hydroxylated to produce norepinephrine.
Norepinephrine is the immediate precursor of epinephrine.
3. Formation of epinephrine: Norepinephrine is methylated by the enzyme
phenylethanolamine N-methyltransferase (PNMT) and converted into epinephrine.
The other amino acids listed are not directly involved in the synthesis of
epinephrine:
1. Valine and Leucine are branched-chain amino acids that are primarily involved
in the metabolism of muscles and energy production.
2. Cysteine is a sulfur-containing amino acid that is important for the
synthesis of proteins with disulfide bridges and is a precursor for other
molecules like glutathione and taurine, but not directly involved in the
synthesis of epinephrine.
49173
General Medicine
Chronic lymphocytic leukemia is characterized by the accumulation of mature-looking but functionally incompetent lymphocytes in the blood, bone marrow, and lymphoid tissues. Common physical examination findings include splenomegaly, lymphadenopathy, and hepatomegaly due to infiltration by leukemic cells.