The site of energy production in a cell is known as?

RUHS, Jaipur, PB B.Sc Nursing Entrance-2020

Applied Physiology

Easy

Appeared in: RUHS, Jaipur, PB B.Sc Nursing Entrance-2020

Explanation

Mitochondria are universally known as the 'powerhouses' of the cell due to their central role in energy production.
They are the primary site for cellular respiration, a metabolic process that converts nutrients into adenosine triphosphate (ATP).
ATP is the main energy currency that fuels most of the cell's metabolic activities and functions.
The inner membrane of the mitochondrion is folded into cristae, which house the electron transport chain and ATP synthase enzymes essential for efficient energy generation.

Option A: Microbodies, such as peroxisomes, are primarily involved in metabolic processes like breaking down long-chain fatty acids and detoxifying harmful substances, not in the large-scale production of ATP for cellular energy.
Option B: Chromosomes are structures within the nucleus that carry the cell's genetic blueprint (DNA). Their function is to store and transmit genetic information and control cell activities, not to produce energy.
Option C: Ribosomes are the sites of protein synthesis, translating genetic information from mRNA into proteins. They are often called the 'protein factories' of the cell and do not generate ATP.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Function of cellular organelles as background academic context rather than a clinical decision trigger.
Cells with high energy demands, such as cardiac muscle, skeletal muscle, and neurons, have a significantly higher number of mitochondria to support their function.
Mitochondrial diseases are a group of disorders caused by dysfunctional mitochondria. These conditions can cause a wide range of health problems, particularly affecting organs and tissues that require a lot of energy, like the brain, heart, and muscles.
What if? If a cell is deprived of oxygen (anaerobic conditions), mitochondria cannot perform oxidative phosphorylation. The cell must then rely solely on glycolysis in the cytoplasm for energy, which is far less efficient and produces lactic acid as a byproduct, leading to muscle fatigue and acidosis.

How to Approach the Question

This is a factual recall question based on fundamental concepts in cell biology.
First, identify the key phrase in the question stem: 'site of energy production'.
Next, systematically review the function of each organelle listed in the options.
Recall that 'Mitochondria' are famously nicknamed the 'powerhouse of the cell' specifically for their role in ATP (energy) production.
Eliminate the other options by confirming their primary roles: Microbodies for metabolism/detox, Chromosomes for genetics, and Ribosomes for protein synthesis.
Select the option whose function directly matches the requirement of the question.

Concept Tested & Keywords

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