EVERYDAY SCIENCE

SCIENCE

RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the starting molecule for glycolysis?
A
Glucose
B
Water
C
Oxygen
D
Pyruvic acid
Explanation: 

Detailed explanation-1: -Glycolysis is a series of reactions that occurs when glucose molecules split into two 3-carbon molecules known as pyruvates, which then release energy in the form of ATP. Starting material for glycolysis is glucose.

Detailed explanation-2: -Glycolysis is a series of reactions which starts with glucose and has the molecule pyruvate as its final product. Pyruvate can then continue the energy production chain by proceeding to the TCA cycle, which produces products used in the electron transport chain to finally produce the energy molecule ATP.

Detailed explanation-3: -During glycolysis, glucose ultimately breaks down into pyruvate and energy; a total of 2 ATP is derived in the process (Glucose + 2 NAD+ + 2 ADP + 2 Pi–> 2 Pyruvate + 2 NADH + 2 H+ + 2 ATP + 2 H2O).

Detailed explanation-4: -Where in the cell does glycolysis occur? Glycolysis occurs in the cytoplasm and involves two stages which break up glucose – a 6-carbon molecule. During the first stage, glucose is broken into two phosphorylated 3-carbon compounds through a series of reactions.

Detailed explanation-5: -In the first step of glycolysis, the glucose ring is phosphorylated. Phosphorylation is the process of adding a phosphate group to a molecule derived from ATP. As a result, at this point in glycolysis, 1 molecule of ATP has been consumed.

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