Tag: bio-chemistry

Questions Related to bio-chemistry

During glycolysis the number of ATP molecules utilized to change glucose into fructose 1, 6 diphosphate are

bio-chemistry respiration in organisms glucose metabolism the need for energy in living organism respiratory function

  1. 4

  2. 3

  3. 2

  4. 1

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Correct Option: C
Explanation:

2 molecules of ATP is utilized during the conversion of glucose into fructose 1,6 diphosphate.

So the correct option is '2'.

Substrate -level phosphorylation accounts for approximately what percentage of the ATP formed by the reactions of glycolysis?

bio-chemistry respiration in organisms glucose metabolism the need for energy in living organism respiratory function

  1. $0\%$

  2. $2\%$

  3. $10\%$

  4. $100\%$

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Correct Option: D
Explanation:

Substrate-level phosphorylation is the direct transfer of phosphate group to ADP to form ATP. It accounts of 100% of the ATP formed by the reactions of glycolysis. The first substrate-level phosphorylation occurs when 1, 3 - diphosphoglyceraldehyde is converted to 1, 3 - diphosphoglyceric acid and 2 NADH$ _2$ are formed, that is 6 ATP are formed. The 1, 3-diphosphoglyceric acid is then dephosphorylated to 3 phosphoglyceric acid producing 2 ATP via substrate-level phosphorylation. The second substrate-level phosphorylation occurs when phosphoenolpyruvic acid is converted to pyruvic acid producing 2 ATP molecules.

Thus, the correct answer is option D. 

Which hormone secreted by thyroid gland ?

bio-chemistry carbohydrate metabolism glucose metabolism the need for energy in living organism respiratory function

  1. Thyroxine

  2. Adrenalin

  3. Testosterone

  4. Phyrotrophic

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Correct Option: A
Explanation:
  • The thyroid gland is composed of two lobes that are located on either side of the trachea.
  • Follicular cells of the thyroid gland synthesize two hormones, tetraiodothyronine or thyroxine ($T _4$) and triiodothyronine ($T _3$). 
  • Thyroid hormones play an important role in the regulation of the basal metabolic rate. 
  • Hence the hormone secreted by the thyroid gland is thyroxine.
  • So, the correct answer is 'Thyroxine'.

Glycogenolysis is

bio-chemistry the respiratory system glucose metabolism the need for energy in living organism respiratory function

  1. Oxidation of sugar

  2. Conversion of glycogen into glucose

  3. Conversion of glucose into glycogen

  4. Conversion of glycogen into fat

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Correct Option: B

Glycogenolysis occurs in.

bio-chemistry the respiratory system glucose metabolism the need for energy in living organism respiratory function

  1. Muscles

  2. Liver

  3. Kidney

  4. Small intestine

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Correct Option: B

Conversion of glycogen into glucose is

bio-chemistry the respiratory system glucose metabolism the need for energy in living organism respiratory function

  1. Gluconeogenesis

  2. Glycolysis

  3. Glycogenolysis

  4. Glycogenesis

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Correct Option: C

Conversion of excess glucose into glycogen is 

bio-chemistry the respiratory system glucose metabolism the need for energy in living organism respiratory function

  1. Glyconeogenesis

  2. Glycogenolysis

  3. Glycolysis

  4. Glycogenesis

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Correct Option: D

Which process helps in maintaining blood glucose level under fasting

bio-chemistry the respiratory system glucose metabolism the need for energy in living organism respiratory function

  1. Glycogenesis

  2. Glycogenolysis

  3. Lipogenesis

  4. Glycolysis

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Correct Option: B

Glycogenolysis involves

bio-chemistry the respiratory system glucose metabolism the need for energy in living organism respiratory function

  1. Conversion of sugar into glycogen

  2. Oxidation of sugar

  3. Conversion of glycogen into fat

  4. Conversion of glycogen into sugar

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Correct Option: D

Column I contains some terms and Column II contains their
meanings. Match them properly and choose the right answer

Column I Colunn II
A Glycogenesis 1 Conversion of glycogen toglucose
B Glycosuria 2 Conversion of glucose toglycogen
C Gluconeogenesis 3 Excretion of glucose in urine
D Glycogenolysis 4 Conversion ofnoncarbohydrate sources toglucose
5 Conversion of glucose tostarch













bio-chemistry the respiratory system glucose metabolism the need for energy in living organism respiratory function

  1. A-1, B - 2, C - 3, D - 4

  2. A - 2, B - 3, C - 4, D -1

  3. A - 2, B - L C - 3, D -4

  4. A -1, B - 5, C - 2, D -4

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Correct Option: B