Biochemistry 2021
Biochemistry Mastery Quiz
Test your knowledge in biochemistry with our comprehensive quiz designed for students and professionals alike. Dive into topics ranging from carbohydrate absorption to porphyrin biosynthesis and evaluate your understanding of this essential field of science.
Highlights of the quiz:
- 30 questions covering crucial biochemistry concepts
- Multiple choice format for engaging learning
- Instant feedback on your performance
1,Maltose is hydrolyze by enzyme
Lactase
Sucrase
Maltase
Disaccharide
Amylase
2.Which of mechanisms is carried out of galactose and glucose from the intestinal epithelial cell to portal blood?
Simple diffusions
Active transport
Passive transport
Carrier protein
Facilitated transport
3. Requirement of facilitated transport only needs
ATP as energy
Carnitine
Albumin
Globulin
Carrier protein
4.Which of the following sugars is absorbed by active transport?
Galactose
Sucrose
Mannose
Pentose
Fructose
5. Which of following factor vitamins is influenced the absorption of carbohydrates present in the intestine?
Vitamin A
Vitamin C
Vitamin E
Vitamin B
Vitamin k
6.Amylase present in the intestine is
Collagenase
α-amylase
Disaccharidase
Phosphorylase
Renin
7.Conversion of glucose to glucose-6-p in muscle which of following enzyme needs
glucokinase
Fructose kinase
Glucose-6-phosphatase
Fructose-6-phosphatase
Hexokinase
8.conversion of pyruvate to acetyl-CoA which of enzyme participate in
Isomaltase
Pyruvate kinase
Lactate dehydrogenase
Pyruvate caboxylase
Pyruvate dehydrogenase
9.Which of the following intermediate substrate of keep’s cycle can carry out from inner mitochondrial membrane to cytosol?
OAA
Succinate
Ketoglutarate
Malate
Fumarate
10.When you can see the glucocorticoid increase?
After administrate 1 hr
During eating
Sleeping
2 or 3 hrs after administration
30min after dinner
11.Which of the following steps in the biosynthesis of porphyrins is the rate- controlling?
Uroporphyrinogen I synthetase
Uroporphyrinogen decarboxylase
α-amino laevulinate synthetase
Protoporphyrinogen oxidase
None of the above
12.Substrates required for haemoglobin biosynthesis are:
‘Active acetate’ and glycine
Glycine and ‘formate’
Active succinate’ and lysine
Active succinate and glycine
Formate and lysine
13,Which of the porphyrins go into the formation of protoporphyrin IX?
Type l series
Type ll series
Type lll series
None of the above
All of the above
14.In the biosynthesis of porphyrins, which of the coenzyme is required for a-ALA formation:
FAD
NAD+
NADP+
B6-PO4
FMN
15.a-ALA dehydratase enzyme requires for its activity:
Fe++
Cu++
Mn
Co
Mg++
16.Oxidative decarboxylase system which converts coproporphyrinogen III to protoporphyrinogen IX requires which of the coenzyme:
NAD+
B6-PO4
TPP
Flavins
CoA-SH
17.The enzyme which catalyses the synthesis of Haem from protoporphyrin IX is:
Ferroreductase
Ferrochelatase
Ferro oxidase
None of the above
All of the above
18.In mammalian liver, conversion of coproporphyrinogen III to protoporphyrinogen IX requires the presence of:
ATP
Molecular oxygen
Mg++
B6- (P)
NAD+
19.Uroporphyrin and coproporphyrin of which series is excreted in urine in congenital erythropoietic porphyria:
Type l series
Type ll series
Type lll series
None of the above
All of the above
20.-which of following hormone effects the absorption of carbohydrates?
Insulin
Glucagon
Dopamine
Thyroid
Glucocorticoid
21.One of the all mechanism of carbohydrate absorption needs ATP as energy:
Facilitated transport
Active transport
Simple diffusions
Osmosis
Passive transport
22.All monosaccharides are converted by liver cell to the same glucose, except.
Galactose
Pentose
Glucose
Mannose
Fructose
23.conversion of pyruvate to acetyl-CoA, how many NADH does it produce?
2NADH
4NADH
3NADH
10NADH
24.The key enzyme which regulates the process of glycogenesis
Protein kinase
Protein synthetase l
Glycogen synthase
Protein phosphatase I
Acetyl-CoA carboxylase
25.when can you see the inhibition of glycogenesis?
Low glycogen
Intermediate glycogen
Activated glycogen synthase
High concentrations of glycogen
Insulin decrease
26.which of following hormones which participates the degradation of glycogen in muscle, except.
Epinephrine
Norepinephrine
Glucagon
Ca2+ calmodulin
Dopamine
Dopamine
27.The major function of uronic acid pathway is to
Produce ATP as energy
D- glucuronic acid
Esterified fat
Store glucose
Produce protein
28.which of following monoglyceride form is absorbed high concentration from lumen to epithelial cell
Alfa, beta-diglyceride
Alfa-monoglyceride
Beta-monoglyceride
Gama-monoglyceride
Omega-monoglyceride
29.which of amino acid form is transported actively in small intestine?
L-amino acid
L- tryptophan
D-glycine
D-amino acid
D- metheonine
30.chylomicrons is the lipoprotein that can transport fat to
Tissues and liver
Portal blood
Small intestine
Kidney
Heart
31.Meat containing collagen is digested by
Collagenase
Pepsin
Trypsin
Tripeptidase
Protease
32.tell the real name of ketone body is produce by liver cell
Oxaloacetate
Acetoacetate
Beta-OH-butyric acid
Acetone
Pyruvic acid
33. Which of following substrates are intermediate Krebs's cycle, except
Oxaloacetate
Pyruvate
Fumarate
Malate
Alfa-ketoglutarate
34. Which of following amino acids are bonding as protein, except
Ornithine
Serine
Proline
Tyrosin
Aspartate
35.All substances below are substrates of gluconeogenesis, except
Lactate
Fatty acid
Oxaloacetate
Glycerol
Propionic acid
36.which amino acid is classified as ketogenic amino acid?
L-leucine
Isoleucine
Threonine
Methionine
Glutamate
37.Which of the following amino acids produce a vasodilator on decarboxylation:
Histidine
Tyrosine
Tryptamine
Proline
Glycine
38.Which one is an activator of carbamoyl-phosphate synthetase I in the urea cycle?
Methylate
N-acetylglutamate
Lipid
Carbohydrates
Fe2+
39.Which of the following hormones which activates fructose,1,6,diphosphatase in liver
Insulin
Glucocorticoid
Glucagon
Epinephrine
Norepinephrine
40.Which of the following hormones which activates acetyl-CoA carboxylase to produce malonyl-CoA
Epinephrine
Norepinephrine
Insulin
Glucagon
Dopamine
41.The sex hormone is produced by
Triglycerides
Cholesterol
Phospholipid
Protein
Carbohydrate
42.glutamate production is gotten by hydrolysis of
Alfa-ketoglutamate
Glutamine
Dipeptide
Tryptophan
Cysteine
43.which of following monosaccharides which produces energy for seminal fluid
Fructose
Galactose
Pentose
Glucose
Mannose
44.Which of the following amino acids which produces inhibitor neurotransmitter GABA in brain cell
Tryptophan
Tyrosine
Glycine
Glutamate
Glutamine
45.the regulation of cholesterol production determinates by
HMG-CoA synthase
Carboxylase
Oxidase
HMG- CoA reductase
46.The ketone body which excrete through lung
Acetone
Acetoacetate
Beta-OH-butyric acid
Pyruvid acid
Oxaloacetic acid
47.Which of following hormones which stimulates arginine producing NO
Thyroid
Acetylcholine
Epinephrine
Norepinephrine
Doamine
48.Which of the following substrates which participate producing triglycerides
Acetyl-CoA
Glycerol
Pyruvate
Lactate
Succinate
49.Bile pigments are
Cholic acid
Deoxycholic acid
Bilirubin
Chenodeoxycholic acid
50.Degradation of Hb takes place in
Mitonchondrion
Erythrocytes
Cytosol of cells
Reticuloendothelial cells
Reticuloendothelial cells
All of the above
51.In game catabolism, the first bile
A. Cholic acid
B. Bilirubin
C. Lithocholic acid
D. Deoxycholic acid
E. Biliverdin
52. Biliverdin is converted to bilirubin by the process of:
A. Oxidation
B. Reduction
C. Conjugation
D. Decarboxylation
E. Dehydrogenation
53. Bilirubin formed in reticuloendothelial cells is transported to liver in combination with:
Transferrin
Albumin
Globulin
Haptoglobin
Ceruloplasmin
55. Bilirubin is derived from all of the following except:
Destroyed effete red blood cells
Cytochromes
Haemoglobin
Catalase
Coenzymes
56. The enzyme responsible for conjugation of bilirubin is:
Bilirubin esterase
Haemoglobin reductase
Bilirubin conjugase
Glucuronyl transferase
Glutamyl-bilirubin esterase
57- Following are the examples of unconjugated hyperbilirubinaemias, except:
Gilbert’s syndrome
Dublin-Johnson syndrome
Criglar-Najjar syndrome
Lucky-Driscoll syndrome
Transient neonatal hyperbilirubinaemia
58. Unconjugated hyperbilirubinaemia is characteristic of:
Rotor syndrome
Chronic active hepatitis
Gilbert’s syndrome
Dublin-Johnson syndrome
None of the above
59. In Gilbert’s syndrome, there is:
Conjugated hyperbilirubinaemia
Unconjugated hyperbilirubinaemia
Increased transferase activity
Frequent attacks of biliary colic
None of the above
60. In Crigular-Najjar syndrome, there is:
Conjugated hyperbilirubinaemia
Increased glucuronyl transferase activity
Increased hemolytic activity
Unconjugated hyperbilirubinaemia
None of the above
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