MDS PREP
.Glucose can be synthesised from all of the following except
1. amino acids 2.Glycerol
3. Acetoacetate 4.Lactic acid
Biochemistry
Answer: 1
Glucose can be synthesised from Glyerol, Acetoacetate, Lactic acid
The essential. sulphur containing amino acid is:
1. Methionine 2. Cystetne
3. Cystine 4. Valine
Biochemistry
Answer: 1
Methionine is sulphur containing AminoAcid
In addition to the influence of the oxygen concentration, the formation of oxyhemoglobin is influenced by
1. pH
2. CO2 concentration
3. Temperature
4. All of the above
Biochemistry
Answer: 4
The formation of oxyhemoglobin is influenced by
1. pH
2. CO2 concentration
3. Temperature
An important rate limiting step of Kreb's cycle is catalysed by
1. pyruvate dehydrogenase
2. isocitrate dehydrogenase
3. succinate dehydrogenase
4. citrate synthetase
Biochemistry Answer: 2
Rate limiting step of Kreb's cycle is catalysed by isocitrate dehydrogenase
Prothrombin production in the liver is dependent upon an adequate dietary supply of
1 Vitamin A
2 Vitamin E
3 Vitamin K
4 None of the above
Biochemistry
Answer: 3
Prothrombin production in the liver is dependent upon Vitamin K intake
The lipids associated with very low density lipoprotein
1. are usually linked covalently to apoproteins.
2. belong primarily to the phosphatidylcholine class.
3. incorporate fatty acids that are synthesized in the liver.
4. reflect, in general, the types of lipids found in the diet.
Biochemistry
Answer: 3
VLDL is a lipoprotein particle synthesized in the liver and secreted into the bloodstream to transport endogenously synthesized triglycerides and cholesterol to peripheral tissues. The triglycerides in VLDL are derived from fatty acids synthesized in the liver, and the cholesterol is derived from both dietary sources and de novo synthesis in the liver. They are not usually linked covalently to apoproteins (Answer 1), nor do they primarily consist of phosphatidylcholine (Answer 2). While the types of lipids found in the diet (Answer 4) can influence the liver's synthesis of VLDL, the statement does not accurately describe the direct composition of VLDL.
An alpha helix of a protein is most likely to be disrupted if a missense mutation introduces the following armino acid within the alpha helical structure:
1. Alanine.
2. Aspartic acid.
3. Tyrosine.
4. Glycine.
Glycine and proline introduce a bend in structure of protein, hence alpha helix disrupted
Aromatic amino acid is:
1. Tyrosine 2. Histidine
3. Arginine 4. Lysine
Biochemistry
Answer: 1
Tyrosine is Aromatic amino acid