1. A teaspoon containing 3.3g of sucrose is added to a cup of tea. How much ener

Question

1. A teaspoon containing 3.3g of sucrose is added to a cup of tea. How much energy, in kilocalories, are in the sucrose if 1g of sucrose provides 4kcal

2.How much grams of ATP (507g/mole) are produced if the sucrose is converted to ATP?

3. What enzymes in glycolysis are used in glyconeogenesis?
4. How is the investment and generation of ATP give a net gain of ATP for glycolysis?
5. How do galactose & fructose, from the digestion of carbohydrates, enter glycolysis?
6. Why is enzyme phosphoglucomutase used in both glycogenolsis and glycogenesis?
7. What is the function of glycogen phosphorylase?

A teaspoon containing 33 g of sucrose is added to a cup of tea Part A How much energy, in kilocalories, are in the sucrose if 1 g of sucrose provides 4 kcal? Express your answer to two significant figures and include the appropriate units. Submit My Answers Give Up

Explanation / Answer

A teaspoon containing 3.3g of sucrose is added to a cup of tea. How much energy, in kilocalories, are in the sucrose if 1g of sucrose provides 4kcal

If 1 g = 4Kcal

Then 3.3g = 3.3* 4 = 13.2 kcal

How much grams of ATP (507g/mole) are produced if the sucrose is converted to ATP

1 mole sucrose = 342.29648 gm = 507 ATP gm

0.009640 moles sucrose= 3.3 gm of sucrose = ?

1 moles = 507 ATP

0.009640 = ?

4.88 ATP = Round Figure = 5 ATP

What enzymes in glycolysis are used in glyconeogenesis?

Hexokinase, Phosphofructokinase, and Pyruvate kinase

4. How is the investment and generation of ATP give a net gain of ATP for glycolysis?

During glycolysis, two molecules of NADH and a net two molecules of ATP are generated. Two molecules of ATP are used to get the pathway started, but four molecules are then synthesized. Thus, there is a net production of two ATP molecules for each glucose molecule converted to two molecules of pyruvate.

5. How do galactose & fructose, from the digestion of carbohydrates, enter glycolysis?

In the liver, galactose is converted to glucose-6-phosphate in order to enter the glycolytic pathway. Fructose is converted into glycogen in the liver and then follows the same pathway as glycogen to enter.

6. Why is enzyme phosphoglucomutase used in both glycogenolsis and glycogenesis?

Phosphoglucomutase convert glucose-1-phosphate reversibly to glucose-6-phosphate.

7. What is the function of glycogen phosphorylase?

Glycogen phosphorylase catalyzes the rate-limiting step in glycogenolysis by releasing glucose-1-phosphate from the terminal alpha-1,4-glycosidic bond.

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