Biochemistry midterms, Summaries of Chemistry

Biochemistry midterm paper organic

Typology: Summaries

2021/2022

Uploaded on 12/27/2022

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Set No 8 Maximal score: 21 p
Midterm (Colloquium) No 2
1. Identify the sub-cla ss of hydroxyacids that produces the following compound via dehydration and/or heating:
1γ-hydroxy acids 2δ-hydroxy acids 3α-hydroxy acids 4β-hydroxy acids
2. Which of the following is the C-2 epimer of glucose?
1 2 3 4
3. What is the result of decarboxylation and dehydration of tartaric acid?
1 2 3 4
4. Identify the lactim tautomer of cytosine.
1 2 none 3 4
5. Identify the common name of the following structure:
1lactic acid 2pyruvic acid 3glycolic acid 4glyoxalic acid
6. Which of the following steroids contains carbonyl group in the ring A?
1estrone 2estradiol 3v itamin D2 4testosterone
7. Which of the following is absent in the weakly a lkaline solution of D-glucose?
1 2 3 4
8. Which of the following amino acids is es sential?
1 2 3 4
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Set No 8 Maximal score: 21 p Midterm (Colloquium) No 2

  1. (^) Identify the sub-class of hydroxyacids that produces the following compound via dehydration and/or heating: (^1) γ-hydroxy acids 2 δ-hydroxy acids 3 α-hydroxy acids 4 β-hydroxy acids
  2. (^) Which of the following is the C-2 epimer of glucose? 1 2 3 4
  3. (^) What is the result of decarboxylation and dehydration of tartaric acid? 1 2 3 4
  4. (^) Identify the lactim tautomer of cytosine. (^1 2) none 3 4
  5. (^) Identify the common name of the following structure: (^1) lactic acid 2 pyruvic acid 3 glycolic acid 4 glyoxalic acid
  6. (^) Which of the following steroids contains carbonyl group in the ring A? (^1) estrone 2 estradiol 3 vitamin D2 4 testosterone
  7. (^) Which of the following is absent in the weakly alkaline solution of D-glucose? 1 2 3 4
  8. (^) Which of the following amino acids is essential?

Set No 8 2

  1. (^) Identify the following compound: (^1) amino-lactam tautomer of guanine (^2) imino-lactim tautomer of guanine (^3) imino-lactam tautomer of guanine (^4) amino-lactim tautomer of guanine
  2. (^) Which of the following is pyruvic acid? 1 2 3 4
  3. (^) Identify the compound: (^1) β -D-glucopyranose 2 α-D-mannopyranose 3 β -D-fructopyranose 4 α-D-galactopyranose
  4. (^) Which of the following amino acids is NOT essential? 1 2 3 4
  5. (^) Identify the compound: (^1) lactose 2 cellobiose 3 maltose 4 gentiobiose
  6. (^) Identify the steroid: (^1) progesterone 2 estradiol 3 cholesterol 4 estrone
  7. (^) Consider pairs of structures and common names of amino acids. Identify the one where name does NOT correspond to the structure.