bio 1201 exam 2
This graph illistrates how an enzyme catalyzes reactions in biological systems. To start a reaction, a certain amount of energy must be absorbed by the reactants. This is called the energy of activation. Which of the following is the energy of activation in a chemcial reaction without enzymes present to catalyze the reacion?
A (black line peak)
The image seen here is depicting red blood cells in a solution where there is less water outside of the cell than inside (or there is a higher concentration of solutes/salt outside of the cell than inside). which of the following terms best fits the solution these cells are in?
Hypertonic
What type of movement of substances across a plasma membrane involves the movement of water across a selesctively permeable membrane, from an area of higher solute concentration to an aea of lower solute concentration?
Osmosis
enzymes catalyze many reactions in a cell. There are hundreds of different enzymes in a cell - each with a unique three-dimensional shape. Why do cells have so many different enzymes?
The shape of the enzymes's active site generally fits a specific substrate molecule
The main functions of connective tissues are to supportand connect other tissues. The structure of connective tissues can best be decribed as which of the following below. (or we can distinguish connective tissue from other tissues based upon what feature?)
an extracellular matrix of varying components surrounding scattered cells
Which of the following choices is one function of epithelial tissue?
covering surfaces of organs
which of the following could be a description of the depicted organ system's function? (nasal cavity, pharynx, larynx, trachea, bronchus, lung)
exchange of gases between the blood and air
which of the following choices is the mechanism that most homeostatic responses depend on to maintain internal conditions?
negative feedback inhibition
which of the following best describes homeostatsis
organisms maintain a small, narrow range of internal conditions