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Biochemistry 2 > Midtterm past question > Flashcards

Midtterm past question Flashcards

1
Q
  1. The urea is regulated by?

A. Acetyl Coa
B. Citrate
C. Malonyl Coa D. N- acetylglutamate
E. Cytoplasmic carbamoylphosphate

A

E. Cytoplasmic carbamoylphosphate

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2
Q
  1. Which of the following will not require NADPH+ H+?

A. Synthesis of oleic acid
B. Synthesis of palmitic acid
C. The beta oxidation of fatty acid
D. Each of these requires NADPH+ H+

A

C. The beta oxidation of fatty acid

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3
Q
  1. Which of the following is not a dehydrogenase in the TCA cycle?
A. Isocitrate dehydrogenase
B. Alpha- ketoglutarate dehydrogenase
C. Pyruvate dehydrogenase
D. Succinate dehydrogenase
E. Malate dehydrogenase
A

C. Pyruvate dehydrogenase

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4
Q
  1. Alanine transaminase(ALT) transfers an amino group from alanine to?
A. Pyruvate
B. Alpha – ketoglutarate
C. Oxaloacetate
D. Methionine
E. Carbamoyl phosphate
A

B. Alpha – ketoglutarate

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5
Q
  1. Which of the following statements about the reactions of glycolysis is true?

A. In glycolysis glucose – 6 – phosphate is split into glyceraldehyde – 3- phosphate and
dihydroxyacetone-phosphate

B. In glycolysis fructose – 1,6 – biphosphate is split into glyceraldehyde– 3- phosphate and
dihydroxyacetone-phosphate

C. In glycolysis frutose – 6- phosphate is split into glyceraldehyde – 3- phosphate and
dihydroxyacetone-phosphate

D. In glycolysis glucose – 6 – phosphate is isomerized to fructose 1,6 –biphosphate

A

B. In glycolysis fructose – 1,6 – biphosphate is split into glyceraldehyde– 3- phosphate and
dihydroxyacetone-phosphate

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6
Q

6.This enzymatic reaction takes place in the mitochondria

A. 6 – phosphogluconate dehydrogenase
B. Pyruvate kinase 
C. Succinate dehydrogenase
D. Glucokinase
E. All of these answers are true
A

E. All of these answers are true

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7
Q 
7.Contain B- D- glucose
A. Starch
B. Maltose
C. Glycogen
D. Cellulose
E. Hyaluronic acid
A

D. Cellulose

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8
Q 
8. From which molecule can be produced oxaloacetate?
A. Malate
B. Pyruvate
C. Aspartate
D. All of answers are false A-C
E. All answers A-C are true
A

E. All answers A-C are true

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9
Q
  1. Which pathway reaction takes place in the mitochondrion?
A. Synthesis of palmitic acid
B. Beta – oxidatation of palmitic acid
C. Glycolysis
D. Glycogenesis
E. All of the answers A-D is false
A

B. Beta – oxidatation of palmitic acid

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10
Q
  1. Which of the following statements about the generation of ATP in the electron transport chain is true?

A. The generation of ATP from ADP coupled to electron transfer occurs by substrate level phosphorylation as in glycolysis

B. Electron transport generates a proton gradient across the outer mitochondrial membrane

C. ATP synthase in valves are structured outside the inner
mitochondrial membrane

D. ATP synthase in valves are structures outside the outer mitochondrial membrane

A

C. ATP synthase in valves are structured outside the inner mitochondrial membrane

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11
Q
  1. Which enzymatic NADP+ as a cofactor?
A. 6 – P – gluconate dehydrogenase
B. Lactate dehydrogenase
C. Glyceraldehyde – 3- P – dehydrogenase
D. Succinate dehydrogenase
E. Alle of answers A-D is false
A

A. 6 – P – gluconate dehydrogenase

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12
Q
  1. Which of the following statements about the ketone
    bodies/acetoneacetate and B- hydroxybutyrate is true?

A. Muscles produce ketone bodies from fatty acids
B. Adipose tissue can produce ketone bodies from its fat stores
C. The liver produces acetoacetate and B-hydroxybyturate from fatty acids
D. Acetoacetate is metabolized to acetate in peripheral tissue

A

C. The liver produces acetoacetate and B-hydroxybyturate from fatty acids

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13
Q
  1. Increased cAMP concentration increases the activity of following enzymes?
A. Phosphorylase kinase
B. Glycogen phosphorylase
C. Hormone sensitive lipase
D. All of these answers is false
E. All of these answers is true
A

E. All of these answers is true

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14
Q
  1. Alpha – ketoglutarate is the end product of the reaction catalyzed by following enzyme?
A. Pyruvate carboxylase
B. Lactate dehydrogenase
C. Pyruvate dehydrogenase
D. Glutamate decarboxylase
E. None of them
A

E. None of them

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15
Q
  1. Start molecule of ketogenesis?

A. Propionyl Coa
B. Glycerol
C. Glutamic acid (glutamate)
D. Acetyl Coa

A

D. Acetyl Coa

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16
Q
  1. How much energy is produced in the anaerobe glycolysis of 1 mol glucose?
A. 2 mol ATP
B. 3 mol ATP
C. 36 mol ATP
D. 129 mol ATP
E. All of the answers A – D is false
A

A. 2 mol ATP

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17
Q
  1. Which of the following enzymes need thiamine pyrophosphate (TPP) as cofactor?
A. Lactate dehydrogenase
B. L – glutamate dehydrogenase
C. Serine decarboxylase
D. Pyruvate dehydrogenase
E. Pyruvate carboxylase
A

D. Pyruvate dehydrogenase

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18
Q
  1. Which of the following molecules contains the most carbon atoms?

A. Tyrosine
B. Tyramine
C. Palmitic acid
D. Histidine

A

C. Palmitic acid

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19
Q
  1. Start molecule of ketogenesis?
A. Leucine
B. Glutamic acid
C. Propanyl – Coa
D. All of them is false
E. All of them is true
A

A. Leucine

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20
Q
  1. Which pathway reaction takes place in mitochondria?
A. Synthesis of palmitic acid
B. Beta oxidation of palmitic acid
C. Glycolysis
D. Synthesis of cholesterol
E. None of them
A

B. Beta oxidation of palmitic acid

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21
Q
  1. How much energy is produced in the complete oxidation of 2 mol glucose?
A. 72
B. 3
C. 36
D. 129
E. None of them
A

A. 72

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22
Q

22.Characteristics of arachidonic acid?

A. Omega 6 unsaturated fatty acids, four double bonds, 20 C

B. Omega 3, unsaturated fatty acis, three double bonds, 18 C

C. Omega 6 unsaturated fatty acids, two double bonds, 18 C

D. Omega 3 unsaturated fatty acids, four double bonds, 20 C

E. None of them

A

A. Omega 6 unsaturated fatty acids, four double bonds, 20 C

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23
Q
  1. Which has not a high energy bond?
A

Glucose – 6 – phosphate

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24
Q
  1. Start molecule of GNG?
A

Pyruvate

25
Q
  1. This enzyme uses NAPD as a cofactor?
A. Succinate dehydrogenase
B. Lactate dehydrogenase
C. Glyceraldehyde – 3 – phosphate dehydrogenase
D. 6 – P- gluconate dehydrogenase
E. None of them
A

D. 6 – P- gluconate dehydrogenase

26
Q

26.From which molecule can be produced oxaloacetate

A. Pyruvate
B. Acetoacetate
C. Leucine
D. None of them
E. All of them
A

A. Pyruvate

27
Q
  1. This molecule can be synthesized from HMG – Coa in a given pathway?
A. Acetate
B. Acetone
C. 3 – acyl-glycerol
D. All of them are
E. None of them
A

E. None of them

28
Q 
28. Which of the following is a common intermediate in the conversion of gly to glucose?
A. Phosphoenolpyruvate
B. Fructose – 1,6 – biphosphate
C. Malate
D. Oxaloacetate
E. Pyruvate
A

E. Pyruvate

29
Q
  1. Which enzyme catalyzes reaction where substrates level phosphorylation happens?
A. Succinyl CoA synthethase/Pyruvate kinase
B. Succinate dehydrogenase
C. Acetyl coenzyme carboxylase
D. Glutamine synthethase
E. None of them
A

A. Succinyl CoA synthethase/Pyruvate kinase

30
Q
  1. Which establishment is not characteristic for the complex of the respiratory chain?
A. Collector is FMN
B. Hydrogen uptake from any NADH+ H+
C. Contains HEM iron
D. Contains proton channel
E. None of them
A

C. Contains HEM iron

31
Q
  1. Characteristic of linoleic acid?

A. 6 unsaturated fatty acids, two double bonds, 20 C
B. 3 unsaturated fatty acids , three double bonds, 18 C
C. 6 unsaturated fatty acids, two double bonds, 18 C
D. 3 unsaturated fatty acids, three double bonds, 20 C

A

C. 6 unsaturated fatty acids, two double bonds, 18 C

32
Q
  1. In the urine of a healthy cat can be found?
A. Urea, uric acid and ammonium ion
B. Urea, allantoine, ammonium ion
C. Only urea
D. Only uric acid
E. None of them
A

B. Urea, allantoine, ammonium ion

33
Q
  1. In the urine of a healthy dalmantin dog can be found?
A. Urea, uric acid and ammonium ion
B. Urea, allantoine, ammonium ion
C. Only urea
D. Only uric acid
E. None of them
A

A. Urea, uric acid and ammonium ion

34
Q
  1. Start molecule of gluconeogenesis?
A. Acetoacetate
B. Leucine
C. Glutathione
D. Lactate
E. All of them
A

D. Lactate

35
Q
  1. How many energy is produced in the beta oxidation of 1 mol palmitoyl – CoA?
A. 129 mol ATP
B. 131 mol ATP
C. 146 mol ATP
D. 148 mol ATP
E. None of them
A

B. 131 mol ATP

36
Q
  1. This reaction happens in cytoplasm?
A. ATP citrate lyase
B. Fatty acyl – coA dehydrogenase
C. Succinate dehydrogenase
D. HMG – CoA lyase
E. Non of them
A

A. ATP citrate lyase

37
Q
  1. Which cycle produced NADPH+ H?
A

Pentose phosphate pathway

38
Q
  1. Primary bile acids?
A

Cholic acid/Chenodeoxycholic acid

39
Q
  1. What is splitting urea in rumen?
A

Bacterial urase

40
Q
  1. Start molecule of oxaloacetic synthesis?
A

Pyruvate

41
Q
  1. Which amino acid produces GABA?
A

Glutamate

42
Q
  1. Where can we NOT find ketosis?
A

Liver

43
Q
  1. Essential amino acid in horse?
A

Lycine

44
Q
  1. Allosteric enzyme?
A

Reversible enzyme inhibition

45
Q
  1. Where is fat produced?
A

Mammary gland
Adipose tissue
Liver in some species

46
Q
  1. Energy gain from oxidation from 1 glucose molecule?
A

36 ATP

47
Q
  1. What amino acid can make pyruvate?
A

Alanine,
Serine,
Glycine,
Cysteine

48
Q
  1. What amino acid can make glutamic acid?
A

Alanine

49
Q
  1. What is the amine group needed for the transamination of a new amino acid?
A

Glutamic acid

50
Q
  1. Where are transaminases found?
A

Cytoplasm or mitochondria

51
Q
  1. Which one is a volatile fatty acid?
A

Acetate,
Propionate and
Butyrate

52
Q
  1. Which compound can be produced from HMG – CoA?
A

Cholesterol,

KBS

53
Q
  1. Which enzyme is responsible for the transformation of pyruvate to oac?
A

Pyruvate carboxylase

54
Q
  1. What are the uncoupling factors?
A

Dinitrophenol and

Thermogenine

55
Q
  1. Which fatty acid has the longest chain?
A

DHA , 22 C

56
Q

56.What is the glucose level in ruminents?

A

2-3 mmol/l

57
Q
  1. Glucose in birds?
A

8 – 9mmol/l

58
Q
  1. Glucose level in dogs?
A

4-5 mmol/l

59
Q
  1. What is the 1st messenger in fat metabolism?
A

Adrenalin,
Nor – adrenalin,
Glucagon and
ACTH

Biochemistry 2 (7 decks)

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