Subject: “Biochemistry with fundamentals of physical and colloid chemistry” Teachers I. Kalinin and V. Zhulai. Block of tests Variant №4

Question 1. Which of aminoacids mentioned below are non-essential?

1 – Arg, 2 – His, 3 – Ser, 4 – Phe.

Question 2. Which of aminoacids mentioned below are ketogenic?

1 – Lys, 2 – Ile, 3 – His, 4 – Val.

Question 3. Which substance is a precursor for biosynthesis of serine?

1. aceto-acetate

2. glutaminic acid

3. 3-phosphoglicerolic acid

4. leucine

Question 4. Which substance is a precursor for biosynthesis of cysteine?

1. arhynine

2. metionine

3. glycine

4. proline

Question 5. Which of aminoacids mentioned below during oxidative splitting turn into piruvate?

1 – Asp, 2 – Phe, 3 – Glu, 4 – Gly.

Question 6. Which of aminoacids mentioned below during oxidative splitting turn into succinyl CoA?

1 – Val, 2 – Thr, 3 – Phe, 4 – Pro.

Question 7. Which enzyme catalyze reversible transformation of keto-acids into aminoacids?

1 transaminase

2 Aminopeptidase

3 urioxydase

4 xantinoxidase

5 aminohydrolase

Question 8. Which of the substances mentioned below belong to keton bodies?

1 fumaric acid

2 α-ketoglutaric acid

3 β-hydroxybutyrate

4 acetyl CoA

Question 5. Which of aminoacids mentioned below during oxidative splitting turn into fumaric acid?

1 – Ile, 2 – His, 3 – Pro, 4 – Tyr.

Question 6. Which of aminoacids mentioned below during oxidative splitting turn into succinyl CoA?

1 – Lys, 2 – Met, 3 – Pro, 4 – Trp.

Question 7. Which group of enzymes catalyze reversible transformation of aminoacids into keto-acids?

1 aminoacyltransferases

2 decarboxylases

3 dehydrogenases

4 phosphotransferases

5 transaminases

Question 8. Which of the substances mentioned below belong to keton bodies?

1 oxaloacetic acid

2 acetone

3 acetyl CoA

4 succinyl CoA

Subject: “Biochemistry with fundamentals of physical and colloid chemistry” Teachers I. Kalinin and V. Zhulai. Block of tests Variant №5

Question 1. Which of aminoacids mentioned below are cyclic?

1 – Arg, 2 – Met, 3 – Phe, 4 – Ser.

Question 2. Which of aminoacids mentioned below are sulphur-containing?

1 – Leu, 2 – Val, 3 – Met, 4 – Lys.

Question 3. Which substance is a precursor for biosynthesis of cysteine?

1. serine

2. glutaminic acid

3. leucine

4. lysine

Question 4. Which substance is a precursor for biosynthesis of proline?

1. alanine

2. glycine

3. tyrozine

4. glutaminic acid

Subject: “Biochemistry with fundamentals of physical and colloid chemistry” Teachers I. Kalinin and V. Zhulai. Block of tests Variant №6

Question 1. Which of aminoacids mentioned below are hetero-cyclic?

1 – Ser, 2 – Trp, 3 – Thr, 4 – Tyr.

Question 2. Which of aminoacids mentioned below are dicarboxylic?

1 – Asp, 2 – Ala, 3 – Gln, 4 – Val.

Question 3. Which substance is a precursor for biosynthesis of tyrozine?

1. fumaric acid

2. phenylalanine

3. α-ketoglutaric acid

4. treonine

Question 4. Which substance is a precursor for biosynthesis of aceto-acetate?

1 β-hydroxybutyrate

2 β-hydroxymetylglutarylCoA