A1.1.1 Water as the medium for life Flashcards
What is the significance of water’s polarity?
Water’s polarity allows it to form hydrogen bonds, which are essential for its unique characteristics and for biochemical interactions.
How does water participate in metabolism?
Water actively participates in biochemical reactions, such as hydrolysis and condensation.
How does water contribute to thermoregulation in organisms?
Water’s high specific heat capacity allows it to absorb and release heat, helping maintain stable internal temperatures.
What makes water irreplaceable as a solvent for life?
Water’s unique combination of properties, including its polarity, high heat capacity, and ability to dissolve substances, creates an environment where life can thrive.
Define prebiotic soup.
A nutrient-rich mixture of organic molecules dissolved in water, providing ideal conditions for chemical reactions and the emergence of the first cells.
What happens in a hydrolysis reaction?
In hydrolysis, water breaks down complex molecules into simpler ones.
Why is water called the universal solvent?
Water can dissolve a wide range of substances, allowing molecules to interact and biochemical reactions to occur.
Give an example of water’s role in transport within the body.
Oxygen dissolving in water in the bloodstream allows it to be carried to cells.
Why is water’s role in cellular processes crucial?
Water is an active participant in many biochemical reactions, making processes more efficient.
What are cohesion and adhesion in water?
Cohesion is the sticking together of water molecules, while adhesion is the clinging of water to other surfaces.
How does water’s high specific heat capacity benefit aquatic environments?
It helps maintain stable temperatures, providing a consistent environment for life processes.
What is the relationship between water and enzymatic reactions?
Water actively participates in enzymatic reactions, facilitating processes like hydrolysis and condensation.
What is the role of water in the transport of substances?
Water is the primary component of fluids like blood and lymph that transport nutrients, gases, and waste products.
What is specific heat capacity?
Specific heat capacity is the amount of heat a substance can absorb or release without undergoing significant temperature changes.
Why is water essential for biochemical reactions?
Water dissolves ions, sugars, and other molecules, creating a solution where reactions can occur efficiently.
Why are cohesion and adhesion important for plants?
They are vital for transpiration, allowing water to travel from roots to leaves against gravity (capillary action).
