The Question is from neet-botany respiration-in-plants introduction, and it was created by the author Mr. NARESH KUMAR K

Question

Choose the correct combination of A and B according to NCERT text book.
All living organisms need …A… for carrying out daily life activities and is obtained by …B… of macromolecules

Mr. NARESH KUMAR K · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Metabolism and Energy
	**Related Topics**: Cellular Respiration, Macromolecules, Nutrition
	**Prerequisites**: Basic understanding of biological processes and macromolecules.
## SOLUTION PATHWAY
**Given Information**:
	Living organisms need 'A' for daily activities.
	'A' is obtained by 'B' of macromolecules.
**Method & Steps**:
	1. Living organisms require energy to perform all life functions, from movement and growth to transport and reproduction.
		Reasoning: Energy is essential for driving all biological processes.
	2. This energy is derived from the breakdown (oxidation) of macromolecules like carbohydrates, lipids, and proteins.
		Working: Macromolecules store energy in their chemical bonds.  These bonds are broken down through metabolic processes like respiration, releasing energy.
		Key Point: Oxidation is a process that involves the loss of electrons, often accompanied by the release of energy.
	3. Therefore, A is 'Energy' and B is 'Oxidation/Breakdown'.
		Result: A: Energy, B: Oxidation/Breakdown
		Verification: This aligns with the fundamental principles of biology, as organisms obtain energy by breaking down complex molecules.
 ## OPTION ANALYSIS
[A] ✓: All living organisms need 'Energy' for carrying out daily life activities, and this energy is obtained by the 'Oxidation/Breakdown' of macromolecules like carbohydrates, fats, and proteins.
[B] :x: While organisms need nutrients, these nutrients themselves are the building blocks or the result of macromolecule synthesis. The prompt focuses on how energy is obtained, not the utilization of nutrients.
[C] :x: Sunlight is the primary source of energy for photosynthetic organisms, but the question focuses on how all living organisms (including non-photosynthetic ones) obtain energy.  They do this by breaking down macromolecules, not by directly absorbing sunlight.
[D] :x: Hydrolysis is a process that breaks down macromolecules by adding water, but it doesn't necessarily release the energy needed for daily activities in a readily usable form. Oxidation is the key process for energy release.
 ## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing nutrients with energy: Nutrients are substances required for growth and maintenance, while energy is the driving force behind life processes.
			How to avoid: Remember that energy is obtained from the breakdown of nutrients (macromolecules).
		2. Misunderstanding the role of sunlight: Sunlight is the ultimate source of energy for most ecosystems, but all organisms obtain usable energy through the breakdown of organic molecules.
			How to avoid: Differentiate between the primary source of energy (sunlight) and the process by which organisms obtain usable energy (oxidation of macromolecules).
	**Quick Tips**:
		1. Remember the equation: Food (macromolecules) + Oxygen → Energy + Carbon Dioxide + Water
		2. Think of 'oxidation' as 'burning' – a process that releases energy.

Mr. NARESH KUMAR K · Answer

The correct Option is "A: Energy, B: Oxidation/Breakdown"

Mr. NARESH KUMAR K · Answer

A: Nutrients, B: Synthesis

Mr. NARESH KUMAR K · Answer

A: Sunlight, B: Absorption

Mr. NARESH KUMAR K · Answer

A: Water, B: Hydrolysis

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