Biology Quiz: Key Terms and Concepts

Questions and Answers

What is the term for the ability of a living thing to keep conditions inside its body constant?

Biodiversity

Ecosystem

Metabolism

Homeostasis (correct)

What is a large molecule formed when many smaller molecules bond together called?

Macromolecule

Polymer (correct)

Monomer

Covalent Bond

What is the nutrient cycle?

The movement of materials (nutrients) in a local ecosystem.

Define 'Organism.'

A living thing that has (or can develop) the ability to act or function independently. Signup and view all the answers

What does 'polar' mean in a chemical context?

Having a pair of equal and opposite charges. Signup and view all the answers

What does 'hydrophobic' refer to?

Water fearing. Signup and view all the answers

What is a solute?

The dissolved substance in a solution. Signup and view all the answers

What is the definition of 'decomposer'?

Organism that breaks down and obtains energy from dead organic matter. Signup and view all the answers

What is the Greenhouse effect?

Warming that results when solar radiation is trapped by the atmosphere. Signup and view all the answers

What does 'photosynthesis' refer to?

Process by which plants use the sun's energy to convert water and carbon dioxide into sugars. Signup and view all the answers

What is 'cellular respiration'?

The metabolic processes whereby certain organisms obtain energy from organic molecules. Signup and view all the answers

Define 'metabolism.'

Set of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes. Signup and view all the answers

Study Notes

Homeostasis and Biological Processes

Homeostasis: Essential for maintaining stable internal conditions in living organisms.
Polymer: Large molecules formed from smaller monomer units, fundamental in biological structures.
Nutrient Cycle: Crucial for ecosystem health, involving the movement of nutrients within local systems.
Metabolism: Encompasses all chemical reactions that sustain life, including both anabolic and catabolic processes.

Molecular Interactions

Polar vs. Non-polar: Polar molecules have unequal charge distribution, while non-polar molecules have no net charge.
Charged: Refers to molecules with an excess (negative) or deficiency (positive) of electrons.
Hydrogen Bond: A weak bond between a hydrogen atom and electronegative atoms, significant for water and biological molecules.

Cell Structure and Function

Organelles: Specialized cellular structures performing essential tasks to sustain life.
Macromolecule: Refers to large, complex biological molecules essential for life, including proteins, lipids, and nucleic acids.
Enzymes: Proteins that catalyze biochemical reactions, crucial for metabolic pathways.

Ecosystem Dynamics

Ecosystem: Interactions between communities of organisms and their physical environment.
Trophic Levels: Hierarchical levels within a food chain, illustrating energy transfer from producers to consumers.
Food Web: A complex network of interrelated food chains showing multiple feeding relationships.

Nutrition and Energy Flow

Autotroph: Organisms capable of converting inorganic substances into organic matter through processes like photosynthesis.
Heterotroph: Organisms relying on consuming other living things for energy.
10% Rule: At each trophic level, only around 10% of the energy is passed onto the next level, highlighting energy loss.

Water and its Properties

Capillary Action: The ability of water to rise in narrow spaces due to cohesion and adhesion.
Surface Tension: A force created by cohesion that allows droplets to form and resist external force.
Hydrophilic vs. Hydrophobic: Materials that love (hydrophilic) or fear (hydrophobic) water, impacting molecular interactions.

Climate and Environmental Impact

Greenhouse Effect: Natural warming phenomenon caused by atmospheric gases trapping solar radiation.
Global Climate Change: Broad alterations in Earth's climate patterns due to increased greenhouse gas emissions.
Ecological Footprint: Measures individual or community impact on the Earth, quantifying natural resource use.

Digestion and Absorption

Digestion Types: Mechanical digestion involves physical processes, while chemical digestion occurs through enzymatic reactions.
Chyme: Semi-liquid mass of partially digested food moving from the stomach to the small intestine.
Villi: Small projections in the small intestine that increase surface area for nutrient absorption.

Digestive System Components

Saliva: Contains enzymes like amylase that initiate starch digestion in the mouth.
Stomach: Muscular organ where digestion of proteins begins through enzymes like pepsin.
Pancreas: Produces digestive enzymes (e.g., trypsin, lipase) and hormones, playing a critical role in digestion and metabolism.

Laws of Thermodynamics

1st Law: Energy cannot be created or destroyed, only transformed from one form to another.
2nd Law: Energy transformations are inefficient, with energy loss typically as heat, influencing biological processes.

Other Key Concepts

Nitrogen Fixation: Process by which certain soil bacteria convert atmospheric nitrogen for plant use.
Peristalsis: Wave-like muscle contractions that transport food through the digestive tract.
Lock and Key Model: Describes enzyme specificity where each enzyme is tailored to a specific substrate.

Description

Test your knowledge with this biology quiz featuring vital terms such as homeostasis, polymer, nutrient cycle, and organism. Each term is defined to help reinforce your understanding of core biological concepts. Perfect for students looking to solidify their grasp on essential biology vocabulary.