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Amino Acids Quiz

Total questions: 86

Worksheet time: 43mins

Name
Class
Date
1.

Which amino acids are considered neutral?

a)

The number of -NH2 groups equals the number of -COOH groups

b)

The number of -NH2 groups is greater than the number of -COOH groups

c)

The number of -NH2 groups is less than the number of -COOH groups

d)

There are no -NH2 or -COOH groups

2.

Which of the following groups are present in an amino acid molecule?

a)

One -NH2 group, one -COOH group

b)

-NH2 group, -CHO group

c)

=NH group, -COOH group

d)

-NH2 group, -OH group

3.

Which amino acids are considered acidic?

a)

The R group has an -NH2 group

b)

The R group has an -OH group

c)

The number of -COOH groups is greater than the number of -NH2 groups

d)

The number of -NH2 groups is greater than the number of -COOH groups

4.

The following structure represents which amino acid?

a)

Tyrosine

b)

Threonine

c)

Serine

d)

Glycine

5.

Which amino acids are considered basic?

a)

React with acids, do not react with bases

b)

Only have -NH2 group, no -COOH group

c)

The number of -NH2 groups is less than the number of -COOH groups

d)

The number of -NH2 groups is greater than the number of -COOH groups

6.

Which amino acid has the following structural formula?

a)

Phenylalanine

b)

Proline

c)

Tryptophan

d)

Histidine

e)

Histamine

7.

Which amino acid has the following structural formula?

a)

Threonine

b)

Tyrosine

c)

Phenylalanine

d)

Proline

e)

Serine

8.

Which group of amino acids is classified as neutral amino acids?

a)

Ala, Thr, Val, Asp, Leu

b)

Leu, Ile, Gly, Glu, Cys

c)

Phe, Trp, Pro, His, Thr

d)

Tyr, Gly, Val, Ala, Ser

e)

Gly, Val, Leu, Ile, Cys

9.

Which group of amino acids is classified as cyclic amino acids?

a)

Thr, Cys, Ile, Leu, Phe

b)

Phe, Tyr, Trp, His, Pro

c)

Phe, Trp, His, Pro, Met

d)

Asp, Asn, Glu, Gln, Tyr

e)

Thr, Val, Ser, Cys, Met

10.

Amino acids can react with which of the following?

a)

Only bases

b)

Only acids

c)

Only alcohols

d)

Only water

11.

Which of the following sets contains amino acids that humans cannot synthesize (essential amino acids)?

a)

Val, Leu, Ile, Thr, Met, Phe, Trp, Lys

b)

Gly, Val, Ile, Thr, Met, Phe, Trp, Cys

c)

Val, Leu, Ile, Thr, Met, Phe, Tyr, Pro

d)

Leu, Ile, His, Thr, Met, Trp, Arg, Tyr

12.

Which of the following correctly describes the structural features of proteins?

a)

1, 2, 3

b)

2, 3, 4

c)

3, 4, 5

d)

1, 3, 4

13.

Which of the following are both amino acids and their corresponding amides?

a)

Asp, Asn, Arg, Lys

b)

Asp, Glu, Gln, Pro

c)

Asp, Asn, Glu, Gln

d)

Trp, Phe, His, Tyr

14.

Amino acids join together via peptide bonds to form which of the following?

a)

Peptide with molecular weight greater than 10,000

b)

Peptide with molecular weight less than 10,000

c)

Protein with molecular weight greater than 10,000

d)

Peptide and protein

15.

Which of the following sets contains only correct options?

a)

1, 2, 3

b)

2, 3, 4

c)

3, 4, 5

d)

1, 2, 4

e)

2, 3, 5

16.

Which types of bonds are commonly found in protein molecules?

a)

Ester, peptide, hydro, hydrophobic, ion

b)

Peptide, disulfide, hydro, hydrophobic, ion

c)

Peptide, disulfide, hydro, ether, ion

d)

Peptide, disulfide, hydro, ether, ester

17.

The structure CH2-CH(NH2)-COOH with an OH group attached to the CH is the structural formula of which amino acid?

a)

Val

b)

Thr

c)

Ser

d)

Cys

e)

Met

18.

The structure CH3-CH(OH)-CH(NH2)-COOH is the structural formula of which amino acid?

a)

Cys

b)

Ser

c)

Leu

d)

Tyr

e)

Thr

19.

Which of the following amino acids can be synthesized by the human body?

a)

Gly, Ser, Tyr, Pro, Glu, Asp

b)

Leu, Ile, Val, Trp, Phe, Met

c)

Asn, Gln, Gly, Met, Cys, Lys

d)

Gly, Ala, Val, Leu, Ile, Ser

e)

Thr, Cys, Met, Lys, Arg, Glu

20.

The structure shown, which contains a benzene ring and CH2-CH(NH2)-COOH, is the structural formula of which amino acid?

a)

Pro

b)

Trp

c)

Tyr

d)

His

e)

Thr

21.

The following structure is the structural formula of which amino acid?

a)

Ala

b)

Leu

c)

Met

d)

Arg

e)

Pro

22.

Which of the following sets correctly describes the characteristics of enzymes that catalyze amino group transfer reactions?

a)

1, 2

b)

2, 3

c)

3, 4

d)

4, 5

e)

1, 4

23.

In which organ is GOT activity mainly increased in certain diseases?

a)

Kidney

b)

Liver

c)

Heart

d)

Digestive tract

e)

Mental health

24.

In which condition is GPT activity mainly increased?

a)

Disorders of carbohydrate metabolism

b)

Some liver diseases

c)

Some heart diseases

d)

Urinary tract infections

e)

Food poisoning

25.

Which of the following are products of oxidative deamination of an amino acid?

a)

Amine, Acid α-cetonic, NH3, Acid carboxylic

b)

Amine, Acid α-cetonic, NH3

c)

Acid α-cetonic, NH3, Acid carboxylic

d)

Amine, NH3, Acid carboxylic

26.

Which of the following is the main form in which NH3 is transported in the body?

a)

Combined with glutamic acid to form glutamin

b)

Combined with aspartic acid to form asparagin

c)

Ammonium salt

d)

Combined with CO2 to form Carbamyl phosphate

27.

What happens to glutamin in the liver?

a)

It is broken down to NH3 and used to synthesize urea

b)

It combines with urea to form a non-toxic compound

c)

It is converted in the bile duct

d)

It is broken down to carbamyl phosphate and used to synthesize urea

28.

What is the fate of glutamin in the kidney?

a)

It is broken down to NH3, which is excreted in urine as NH4+

b)

It is broken down to urea

c)

It is broken down to carbamyl phosphate

d)

It is not metabolized

29.

Which of the following statements about histamine is NOT correct?

a)

It is a product of decarboxylation of histidine

b)

It is an exchange product of histidine

c)

It increases cell membrane permeability and causes allergic reactions

d)

It is an amino acid with a closed ring R group

30.

Select the correct set of statements about histamine:

a)

1, 2, 3

b)

1, 2, 4

c)

1, 2, 5

d)

1, 3, 5

31.

Which compounds are involved in the summary diagram of the urea cycle?

a)

NH3, CO2, Carbamyl phosphate, Citrullin, Aspartat

b)

NH3, CO2, Urea, Citrullin, Aspartat

c)

NH3, CO2, Carbamyl phosphate, Urea, Aspartat

d)

NH3, CO2, Citrullin, Aspartat, Urea

32.

Which compound is appropriate to fill in the blank in the urea cycle diagram?

a)

Arginine

b)

Glutamate

c)

Ornithine

d)

Citrulline

33.

What is the full name of the enzyme abbreviated as GOT?

a)

Glutamin Oxaloacetat Transaminase

b)

Glutamat Ornithin Transaminase

c)

Glutamat Oxaloacetat Transaminase

d)

Glutamin Ornithin Transaminase

e)

Glutarat Oxaloacetat Transaminase

34.

What type of reaction does GOT catalyze?

a)

Exchange of hydrogen

b)

Exchange of amino group

c)

Exchange of carboxyl group

d)

Exchange of imine group

e)

Exchange of methyl group

35.

Which reaction does GPT catalyze involving the exchange of amino groups?

a)

Alanine + α-Ketoglutarate ⟷ Pyruvate + Glutamate

b)

Alanine + Oxaloacetate ⟷ Pyruvate + Aspartate

c)

Aspartate + α-Ketoglutarate ⟷ Oxaloacetate + Glutamate

d)

Glutamate + Phenylpyruvate ⟷ α-Ketoglutarate + Phenylalanine

e)

Aspartate + Phenylpyruvate ⟷ Oxaloacetate + Phenylalanine

36.

Which of the following sets of enzymes are present in the urea cycle?

a)

Carbamyl phosphat synthetase, Ornithin transcarbamylase, Arginosuccinat synthetase, Aconitase, Arginase.

b)

Carbamyl phosphat synthetase, Arginosuccinat synthetase, Fumarase, Arginosuccinase, Arginase.

c)

Carbamyl phosphat synthetase, Ornithin transcarbamylase, Arginosuccinat synthetase, Arginosuccinase, Arginase.

d)

Carbamyl synthetase, Ornithin transcarbamylase, Arginosuccinat synthetase, Succcinase, Arginase.

37.

Which reactions are correct for the synthesis of Glutamate in the human body?

a)

1, 2

b)

2, 3

c)

3, 4

d)

4, 5

38.

Which amino acids participate in the process of Creatine synthesis?

a)

Arginin, Glycin, Cystein

b)

Arginin, Glycin, Methionin

c)

Arginin, Valin, Methionin

d)

Arginin, A. glutamic, Methionin

39.

By which reaction are Alanine and Aspartate synthesized in the human body?

a)

Oxaloacetat + Glutamat ⇌ Aspartat + α Ketoglutarat

b)

Glutamin + H2O ⇌ Glutamat + NH3

c)

NH3 + α Ketoglutarat ⇌ Glutamat

d)

Aspartat + NH3 ⇌ Alanin + α Ketoglutarat

40.

Which of the following sets of reactions are catalyzed by GOT and GPT enzymes?

a)

A. 1, 2

b)

B. 2, 3

c)

C. 3, 4

d)

D. 4, 5

e)

E. 1, 4

41.

Glutathione is a peptide that:

a)

A. Exists in the body in oxidized form

b)

B. Exists in the body in reduced form

c)

C. Is made from 3 amino acids

d)

D. Both A and C are correct

e)

E. All A, B, and C are correct

42.

Albinism is caused by a deficiency of which of the following?

a)

A. Cystein

b)

B. Methionin

c)

C. Melanin

d)

D. Phenylalanin

e)

E. Tyrosin

43.

Serotonin is synthesized from which amino acid?

a)

A. Tyrosin

b)

B. Tryptophan

c)

C. Cystein

d)

D. Methionin

e)

E. Arginin

44.

A deficiency of phenylalanine hydroxylase leads to which pathological condition?

a)

A. Tyrosinuria

b)

B. Homocystinuria

c)

C. Alcaptonuria

d)

D. Phenylketonuria

e)

E. Cysteinuria

45.

The structural formula CH3-CH(NH2)-CH2-COOH represents which amino acid?

a)

A. Glycin

b)

B. Alanin

c)

C. Valin

d)

D. Leucin

46.

Which amino acid has the structural formula CH3-CH2-CH-CH-COOH with a CH3NH2 group?

a)

Glycin

b)

Alanin

c)

Valin

d)

Leucin

e)

Isoleucin

47.

Which amino acid has the structural formula CH2-CH2-CH-COOH with S-CH3 and NH2 groups?

a)

Cystein

b)

Methionin

c)

Threonin

d)

Serin

e)

Lysin

48.

Which amino acid has the structural formula NH2-C-CH2-CH2-CH-COOH with O and NH2 groups?

a)

Arginin

b)

Lysin

c)

Acid aspartic

d)

Glutamin

e)

Acid glutamic

49.

Among the following amino acids, which one contains a -SH group in its structure?

a)

Threonin

b)

Cystin

c)

Cystein

d)

Methionin

50.

Which of the following sets of amino acids are classified as basic amino acids?

a)

Leucin, Serin, Lysin, Histidin, Methionin

b)

Asparagin, Glutamin, Cystein, Lysin, Leucin

c)

Glycin, Alanin, Methionin, Lysin, Valin

d)

Leucin, Serin, Threonin, Tryptophan, Histidin

e)

Arginin, Lysin, Ornithin, Hydroxylysin, Citrulin

51.

Which of the following groups contains only simple proteins?

a)

Albumin, Mucoprotein, Keratin

b)

Mucoprotein, Keratin, Lipoprotein, Collagen

c)

Albumin, Keratin, Collagen

d)

Mucoprotein, Lipoprotein, Collagen

e)

Keratin, Lipoprotein, Collagen

52.

Which reaction is specifically used to identify peptides and proteins?

a)

Ninhydrin reaction

b)

Molish reaction

c)

Biuret reaction

d)

Hydrolysis reaction

e)

Carboxyl reduction reaction

53.

Which of the following groups contains only conjugated proteins?

a)

Collagen, Albumin, Lipoprotein, Keratin

b)

Globulin, Albumin, Glucoprotein, Mucoprotein

c)

Collagen, Lipoprotein, Globulin, Cromoprotein

d)

Keratin, Globulin, Glucoprotein, Metaloprotein

e)

Glucoprotein, Flavoprotein, Nucleoprotein, Lipoprotein

54.

Which of the following enzymes are classified as active endopeptidases?

a)

1, 2

b)

1, 3

c)

1, 4

d)

3, 4

e)

4, 5

55.

Which of the following enzymes are classified as exopeptidases?

a)

1, 2, 3

b)

2, 3, 4

c)

2, 3, 5

d)

2, 4, 5

e)

3, 4, 5

56.

What is the substrate of Cathepsin?

a)

Glucid

b)

Lipid

c)

Protid

d)

Hemoglobin

e)

Acid nucleic

57.

Which of the following are common degradation processes of amino acids?

a)

1, 2, 3

b)

1, 2, 4

c)

2, 3, 4

d)

2, 4, 5

e)

3, 4, 5

58.

Which of the following is a product of the deamination of Acid glutamic?

a)

Acid glutamic

b)

Ammonia

c)

Urea

d)

Glutamine

59.

Which of the following is NOT a biological effect of Acid glutamic?

a)

Acts as a neurotransmitter in the brain

b)

Increases vascular permeability

c)

Has no biological effect

d)

Essential for neuron activity

60.

Which of the following is a correct pathway for NH3 metabolism in the body?

a)

Excreted directly in urine

b)

Participates in transamination reactions

c)

Synthesized into urea in the liver and excreted by the kidneys

d)

Stored in muscle tissue

61.

Which compounds are present in the urea cycle?

a)

Arginine, Ornithine, Aspartate, Citrulline

b)

Glutamine, Alanine, Glycine, Serine

c)

Carbamyl phosphate, Malate, Citrate, Fumarate

d)

Succinyl-CoA, Pyruvate, Lactate, Acetyl-CoA

62.

Which of the following is a function of α-keto acid in metabolism?

a)

Combines with NH3 to form amino acids

b)

Participates in the urea cycle

c)

Used for glucose and glycogen synthesis

d)

All of the above

63.

Which amino acids are involved in the synthesis of Glutathione?

a)

Cysteine, Methionine, Arginine

b)

Glycine, Serine, Threonine

c)

Alanine, Valine, Leucine

d)

Aspartate, Glutamate, Lysine

64.

Which of the following sets correctly lists the products formed from the participation of methionine in metabolic processes?

a)

Cysteine, Glutathion

b)

Glutathion, Taurin

c)

Glutathion, Creatinin

d)

Cysteine, Creatinin

e)

Creatinin, Melanin

65.

Albinism is caused by the deficiency of which enzyme?

a)

Phenylalanin hydroxylase

b)

Tyrosin hydroxylase

c)

Transaminase

d)

Parahydroxy phenyl pyruvat hydroxylase

e)

Homogentisat oxygenase

66.

Deficiency of homogentisat oxygenase leads to which pathological condition?

a)

Phenylceton niệu

b)

Tyrosin niệu

c)

Bệnh bạch tạng (Albinism)

d)

Homocystein niệu

e)

Alcapton niệu

67.

Which of the following is a product of the decarboxylation of amino acids?

a)

Acid α cetonic

b)

Amin tương ứng (Corresponding amine)

c)

NH3

d)

Một số chất có hoạt tính sinh học đặc biệt (Some biologically active substances)

e)

Aldehyd

68.

Which of the following factors does the rate of protein metabolism depend on?

a)

The need for protein synthesis in the body

b)

The type of tissue

c)

The body's energy requirements

d)

All of the above

69.

Which of the following can cause proteins to become denatured?

a)

Temperature

b)

pH (acid, base)

c)

Salt concentration

d)

All of the above

70.

Serotonin is synthesized from which amino acid?

a)

Tyrosine

b)

Tryptophan

c)

Phenylalanine

d)

Glutamic acid

71.

Which of the following statements about serotonin is correct?

a)

It is excreted in urine

b)

It decreases vascular permeability

c)

It is synthesized from glutamic acid

d)

It has no physiological effect

72.

In acute viral hepatitis, what is the change in enzyme activity?

a)

GOT increases, GPT increases, GOT > GPT

b)

GOT increases, GPT increases, GPT > GOT

c)

GOT and GPT increase equally

d)

GOT and GPT do not increase

73.

What is the main form of ammonia (NH3) transport in the blood?

a)

NH4+

b)

Glutamic acid

c)

α-keto acid

d)

Urea

74.

Which molecule connects the Urea cycle with the Krebs cycle?

a)

Aspartate

b)

Ornithine

c)

Oxaloacetate

d)

Succinate

75.

In many biosynthetic processes requiring a methyl group (-CH3), which amino acid provides this functional group?

a)

Arginine

b)

Glutamine

c)

Asparagine

d)

Methionine

76.

Which type of bond plays an important role in maintaining the tertiary structure of proteins?

a)

Peptide bond

b)

Hydrogen bond

c)

Disulfide bond

d)

Ionic bond

77.

Do all amino acids have optical activity?

a)

True

b)

False

78.

Are D α-amino acids commonly found in nature?

a)

True

b)

False

79.

The number of isomers of amino acids is given by the formula 2(n+1)2^{(n+1)} , where n is the number of asymmetric carbon atoms. Is this statement correct?

a)

True

b)

False

80.

Hydrogen bonds are formed between the -COOH group of one amino acid and the -NH2 group of another amino acid by removing a molecule of H2O. Is this statement true or false?

a)

True

b)

False

c)

Only in acidic conditions

d)

Only in basic conditions

81.

Does the solubility of proteins increase with increasing temperature?

a)

True

b)

False

c)

Only at low temperatures

d)

Only at high pH

82.

In newborns, the structure of the intestinal membrane cannot absorb proteins with large molecular weights, such as immunoglobulins (Ig). Is this statement correct?

a)

True

b)

False

c)

Only in adults

d)

Only in elderly

83.

Compared to blood creatinine, is blood urea a more specific test for evaluating kidney function?

a)

True

b)

False

c)

Both are equally specific

d)

Neither is specific

84.

Pepsin, trypsin, and chymotrypsin are enzymes that function well in the acidic environment of the stomach. Is this statement true?

a)

True

b)

False

c)

Only pepsin

d)

Only trypsin

85.

Is the Biuret reaction used to identify amino acids, peptides, and proteins?

a)

True

b)

False

c)

Only for proteins

d)

Only for peptides

86.

Essential amino acids are those that the body can synthesize from the metabolism of carbohydrates and lipids. Is this statement correct?

a)

True

b)

False

c)

Only from carbohydrates

d)

Only from lipids

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