- Which plant(s) are adapted to hot, dry desert environments?
- A car uses the energy stored in the organic molecules of gasoline to propel the vehicle forward. However, not all the energy contained in the fuel molecules is used for propulsion; instead, some is lost as heat. In this scenario, entropy is ____, illustrating the ____ law of thermodynamics.
- When ATP loses a phosphate group and releases that energy, ____ is formed.
- Glucose enters a cell via a glucose transporter. What prevents glucose molecules from moving back through the transporter and leaving the cell?
- Which condition(s) increase the rate of diffusion through a semipermeable membrane?I.steep concentration gradientsII.high temperaturesIII.large molecules
- What is occurring when a transport protein uses energy to pump a solute across a cell membrane against its concentration gradient?
- The accompanying figure illustrates the ____ biological systems.
- Enzymes increase the rate of a given reaction by lowering ____ energy.
- The process by which an enzyme allows a reaction to run much faster than it would on its own is known as ____.
- A car uses the energy stored in the organic molecules of gasoline to propel the vehicle forward. In this scenario, the ____ energy in the gasoline is converted to ____ energy of motion.
- The red blood cells shown in the top micrograph of the accompanying figure are immersed in a(n) ____ solution.
- Some enzymes require inorganic or organic molecules for proper function. These molecules are known as ____.
- A single-celled freshwater organism, such as a protistan, is transferred to salt water. What is likely to happen?
- Which biological molecule(s) may show enzymatic activity?
- During endergonic reactions, reactants with ____ free energy are converted to molecules with ____ free energy; therefore, they require a net input of energy in order to proceed.
- The red blood cells shown in the middle micrograph of the accompanying figure are immersed in a(n) ____ solution.
- Methane (CH4) is a natural gas that is often used as a fuel. When it burns in the presence of oxygen, carbon dioxide and water are produced. Replace the "X" in the following reaction of methane combustion to balance the equation. CH4 + 2O2 → CO2 + XH2O
- During enzyme-catalyzed reactions, the substrate is also known as the ____.
- A glucose transporter changes shape when it binds to a molecule of glucose. The shape change moves glucose down its concentration gradient to the opposite side of the membrane, where it detaches from the transport protein. What does this illustrate?
- Movement of a molecule against its concentration gradient always requires ____.