Fill in the blanks A, B, C, and D with the correct choice of words.
In the glycolysis process, ATP is required in two steps. Firstly, in the conversion of ____________A__________________ to ________________________B______________________ and secondly in the conversion of _____________________C_______________________ to __________________D_______________________.

Options

A. A-Glucose, B-Glucose-1,6-biphosphate, C-Fructose, D- Fructose-6-phosphate
B. A-Glucose, B-Glucose-6-biphosphate, C-Fructose, D- Fructose-6-phosphate
C. A-Glucose, B-Glucose-6-phosphate, C-Fructose-6-phosphate, D- Fructose-1, 6-biphosphate
D. A-Glucose, B-Glucose-6-biphosphate, C-Fructose-6 phosphate, D- Fructose-1, 6-biphosphate

Answer

To solve the question regarding the glycolysis process and the required ATP in two steps, we will fill in the blanks A, B, C, and D with the correct terms.

1. **Understanding Glycolysis**: Glycolysis is the metabolic pathway that converts glucose into pyruvate, generating small amounts of ATP and NADH. It occurs in the cytoplasm and consists of two phases: the preparatory phase and the payoff phase.

2. **Identifying the Steps Involving ATP**:
- In the preparatory phase, ATP is used in two key reactions:
- The first reaction involves the conversion of **glucose** to **glucose 6-phosphate**. This reaction is catalyzed by the enzyme hexokinase, and one ATP molecule is consumed in this process.
- The second reaction involves the conversion of **fructose 6-phosphate** to **fructose 1,6-bisphosphate**. This reaction is catalyzed by the enzyme phosphofructokinase, and another ATP molecule is consumed here.

3. **Filling in the Blanks**:
- A: **glucose**
- B: **glucose 6-phosphate**
- C: **fructose 6-phosphate**
- D: **fructose 1,6-bisphosphate**

Thus, the completed statement is:
"In the glycolysis process, ATP is required in two steps. Firstly, in the conversion of **glucose** (A) to **glucose 6-phosphate** (B) and secondly in the conversion of **fructose 6-phosphate** (C) to **fructose 1,6-bisphosphate** (D)."