Biochemistry MCQ Questions — 8,498 Free Practice Questions – Page 263

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2359 Biochemistry

Serine proteases

AHydrolyze peptide bonds involving carboxyl groups of serine residues

BAre characterized by having several active sites per molecule, each containing a serine residue

CAre inactivated by reaching with one molecule of di-isopropyl-fluorophosphate per molecule of protein

DAre exopeptidases

Biochemistry

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2360 Biochemistry

Which cholesterol is designated as “Good Cholesterol” –

AHDL

BVLDL

CLDL

DIDL

Biochemistry

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2361 Biochemistry

A 2-year old male child presents with pellagra like lesions with passage of amino acids in urine. In the family, out of 4 siblings, two are having similar symptoms with two normal siblings and parents are not affected. Most likely diagnosis is:

APhenylketonuria

BAlkaptonuria

CMaple syrup urine disease

DHanup disease

Biochemistry

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2362 Biochemistry

Insulin acts on which enzyme during glycolysis?

AGlucokinase

BHexokinase

CGlucose-6-phosphatase

DAdenylate kinase

Biochemistry

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2363 Biochemistry

The affinity of hemoglobin for O2 is increased by:

AThe formation of salt bridges in hemoglobin

BThe cross linking of the beta chains of hemoglobin

CLowering the pH

DDecreases in 2, 3-bisphosphoglycerate (BPG)

Biochemistry

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2364 Biochemistry

Increased formation of ketone bodies during fasting is a result of:

ADecreased level of circulating glucagon

BDecreased formation of Acetyl CoA in the liver

CIncreased levels of free fatty acids in blood

DInhibition of b-oxidation of fatty acids in liver

Biochemistry

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2365 Biochemistry

All of the following statements are true regarding lipoproteins except:

AVLDL transpos endogenous lipids

BLDL transpos lipids to the tissues.

CIncreased blood cholesterol is associated with increased LDL receptors

DIncreased HDL is associated with decreased risk of coronary disease

Biochemistry

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2366 Biochemistry

Glucose-6-phosphate dehydrogenase deficiency causes:

AMegaloblastic anemia

BHemolytic anemia

CSickle cell anemia

DMicrocytic anemia

Biochemistry

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2367 Biochemistry

Starches that supply carbohydrate polymers, as well as non-carbohydrate polymers which aid in digestion are known as:

AMonosaccharide

BDisaccharide

CPolysaccharide

DDietary fibers

Biochemistry

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Biochemistry MCQ Questions — Page 263