Biochemistry at Medical University Plovdiv | Flashcards & Summaries

Lernmaterialien für Biochemistry an der Medical University Plovdiv

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13. Which of the following biologically active peptides is / are tissue hormone/s of gastrointestinal tract:

1) vasopressin

2) cholecystokinin

3) angiotensin

4) gastrin

 

a) 1+2+3

b) 1+3

c) 2+4

d) 4

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c)

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3. What is the electric charge of an amino acid in its isoelectric point:

a) positive

b) zero

c) negative

d) -2

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b)

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1. Which of the following amino acids contains a hydroxyl group in its side chain:

1) methionine

2) threonine

3) valine

4) serine

 

a) 1+2+3

b) 1+3

c) 2+4

d) 4

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​C

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5. Which of the following values of the pH corresponds to the isoelectric point of the amino acid alanine,

keeping in mind that pKa1 of the COOH group is 2.35 and pKa2 of the NH2 group is 9.69:

a) 4.8

b) 7.24

c) 6.02

d) 3.0

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c)

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6. Which of the following amino acids has branched side chain:

a) isoleucine

b) tyrosine

c) serine

d) proline

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a)

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7. Which of the following amino acids is basic:

a) glutamate

b) arginine

c) methionine

d) alanine

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b)

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8. Which of the following amino acids are essential:

1) valine

2) lysine

3) threonine

4) phenylalanine


a) 1+2+3

b) 1+3

c) 2+4

d) 1+2+3+4

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d)

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4. Which of the following amino acid residues in the protein molecules may participate in the formation of

ionic bonds:

1) glutamate

2) histidine

3) arginine

4) asparagine


a) 1+2+3

b) 1+3

c) 2+4

d) 1+2+3+4


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a)

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10. Select the biologically active peptide which acts as a protector against the harmful effect of reactive

oxygen species (ROS):

a) endorphin

b) glutathione

c) enkephalin

d) melanocyte-stimulating hormone

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b)

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11. Which of the following amino acids is sulfur-containing:

a) isoleucine

b) tyrosine

c) serine

d) methionine

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d)

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12. Which of the following biologically active peptides is neuropeptide that binds to opioid receptors in the

brain and appears to be one of the natural pain relieving substances:

a) endorphine

b) glutathione

c) neuropeptide Y

d) melanocyte-stimulating hormone

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a)

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15. Which of the following biologically active peptides is a hormone with powerful vasoconstrictor effect

and is involved in the regulation of Na ions in the body:

a) cholecystokinin

b) bradykinin

c) melanocyte-stimulating hormone

d) angiotensin II

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TESTE DEIN WISSEN

d)

Lösung ausblenden
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Q:

13. Which of the following biologically active peptides is / are tissue hormone/s of gastrointestinal tract:

1) vasopressin

2) cholecystokinin

3) angiotensin

4) gastrin

 

a) 1+2+3

b) 1+3

c) 2+4

d) 4

A:

c)

Q:

3. What is the electric charge of an amino acid in its isoelectric point:

a) positive

b) zero

c) negative

d) -2

A:

b)

Q:

1. Which of the following amino acids contains a hydroxyl group in its side chain:

1) methionine

2) threonine

3) valine

4) serine

 

a) 1+2+3

b) 1+3

c) 2+4

d) 4

A:

​C

Q:

5. Which of the following values of the pH corresponds to the isoelectric point of the amino acid alanine,

keeping in mind that pKa1 of the COOH group is 2.35 and pKa2 of the NH2 group is 9.69:

a) 4.8

b) 7.24

c) 6.02

d) 3.0

A:

c)

Q:

6. Which of the following amino acids has branched side chain:

a) isoleucine

b) tyrosine

c) serine

d) proline

A:

a)

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Q:

7. Which of the following amino acids is basic:

a) glutamate

b) arginine

c) methionine

d) alanine

A:

b)

Q:

8. Which of the following amino acids are essential:

1) valine

2) lysine

3) threonine

4) phenylalanine


a) 1+2+3

b) 1+3

c) 2+4

d) 1+2+3+4

A:

d)

Q:

4. Which of the following amino acid residues in the protein molecules may participate in the formation of

ionic bonds:

1) glutamate

2) histidine

3) arginine

4) asparagine


a) 1+2+3

b) 1+3

c) 2+4

d) 1+2+3+4


A:

a)

Q:

10. Select the biologically active peptide which acts as a protector against the harmful effect of reactive

oxygen species (ROS):

a) endorphin

b) glutathione

c) enkephalin

d) melanocyte-stimulating hormone

A:

b)

Q:

11. Which of the following amino acids is sulfur-containing:

a) isoleucine

b) tyrosine

c) serine

d) methionine

A:

d)

Q:

12. Which of the following biologically active peptides is neuropeptide that binds to opioid receptors in the

brain and appears to be one of the natural pain relieving substances:

a) endorphine

b) glutathione

c) neuropeptide Y

d) melanocyte-stimulating hormone

A:

a)

Q:

15. Which of the following biologically active peptides is a hormone with powerful vasoconstrictor effect

and is involved in the regulation of Na ions in the body:

a) cholecystokinin

b) bradykinin

c) melanocyte-stimulating hormone

d) angiotensin II

A:

d)

Biochemistry

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