Problem 114 - Objective Biology for NEET

Question

Assertion: Glycolysis is referred as EMP pathway Reason: The scheme of glycolysis was given by Embden, Meyerhof and Parnas.

Step-by-Step Solution

Answer

Both the assertion and reason are true, and the reason is the correct explanation for the assertion.

Step 1: Verifying the Assertion

Referring to the textbooks or reliable online sources, it can be found that Glycolysis is indeed often referred to as the EMP pathway. Therefore, the assertion is true.

Step 2: Validating the Reason

The reason provided states that the scheme of glycolysis was given by Embden, Meyerhof and Parnas. By again referring to reliable sources of historical scientific information, it is confirmed that the named scientists indeed provided substantial contributions to our understanding of the process and this is why it's named after them. Hence, the reason is true.

Step 3: Correlating Assertion and Reason

After confirming both the assertion as well as the reason, one needs to evaluate whether the reason accurately explains the assertion. As the EMP of the EMP pathway stands for Embden-Meyerhof-Parnas, it can be concluded that the reason provided does indeed explain why glycolysis is referred to as the EMP pathway. The reason correctly explains the assertion.

Key Concepts

EMP pathway

The EMP pathway is a fundamental biochemical route that describes the breakdown of glucose to extract energy for cellular metabolism. EMP stands for Embden-Meyerhof-Parnas, named after the scientists who contributed significantly to elucidating this pathway. This process takes place in the cytoplasm of cells and is the first step in cellular respiration.

• It's a series of ten enzymatic reactions.
• Each step is catalyzed by specific enzymes.
• It converts glucose, a six-carbon molecule, into two three-carbon pyruvate molecules.

The EMP pathway is crucial because it not only provides energy in the form of adenosine triphosphate (ATP), but also produces intermediates used in other metabolic processes. Furthermore, it functions under both aerobic and anaerobic conditions, making it a versatile pathway in energy production.

Embden-Meyerhof-Parnas

The Embden-Meyerhof-Parnas model outlines the classic glycolytic pathway. Otton Meyerhof was a German biochemist who, alongside Gustav Embden and Jakub Parnas, developed a detailed understanding of this metabolic pathway.
These scientists discovered that glucose breakdown involves several intermediate steps and identified key enzymes facilitating these transformations.

• Embden uncovered the phosphate role in glycolysis.
• Meyerhof focused on enzyme functions and energy transfer.
• Parnas contributed to understanding biochemical pathways breakdown further.

Their pioneering research laid the foundation for modern biochemistry by revealing how cells convert sugars to energy.

Metabolic pathways

Metabolic pathways are a series of chemical reactions occurring within a cell. These reactions allow the transformation of molecules and energy flow through the organism. The EMP pathway, or glycolysis, is one of the central metabolic pathways. It stands as a prime example of how cells manage their energy needs and biosynthetic intermediates.
This process is integrated tightly with other pathways such as the citric acid cycle and oxidative phosphorylation.

• They offer control points for regulation.
• Facilitate the efficient use of nutrients.
• Enable adaptation to changes in energy demand.

Understanding metabolic pathways is crucial for comprehending life at the cellular level, disease mechanisms, and developing medical treatments.

Biochemistry

Biochemistry is the science of the chemical processes within and related to living organisms. It underpins many fields like genetics, molecular biology, and physiology. Understanding glycolysis through the lens of the EMP pathway represents a core concept in biochemistry, revealing how organisms obtain and utilize energy.
This knowledge is foundational for understanding diseases related to metabolism and for developing therapies to address various biochemical disorders. By studying biochemistry, scientists can decipher the chemical language of life, enabling advancements in biotechnology and medicine.

• It explains molecular mechanisms of cellular functions.
• It helps comprehend metabolic and enzymatic processes.
• It drives innovation and discovery in life sciences.

Thus, biochemistry provides the tools to unravel the complexities of living systems and innovate solutions to pressing biological challenges.