Chapter 4 Quiz/worksheet Flashcards
What family of macromolecules are enzymes a part of?
Proteins
Enzymes speed chemical reactions by…
Decreasing activation energy
When you place tea into hot water the tea concentrate goes from the tea bag and dispersed throughout the mug
Simple diffusion
Glucose is imported into the cell through a membrane protein where energy is required
Active transport
O2 molecules move from the blood where the concentration is high, into a cell where he concentration is lower
Simple diffusion
Phagocytosis and pi oxytocin’s are examples
Endocytosis
Diffusion of water across a selectively permeable membrane is…
Osmosis
A red blood cell in a hypertonic environment will…
Lose water, shrivel and die
What does the first law of thermodynamics say?
Energy can not be created or destroyed, can only change formsl
Why do enzymes generally bind to only one type of substrate?
Because they generally are only able to assist in very particular reactions breaking down specific materials
Have specific shape and function “lock and key”
What effect do enzymes have on the activation energy of a reaction?
They assist in the reaction by lowering the activation energy essentially making it “easier” for the reaction to occur
A sugar cube dropped into a cup and without being stirred all of the liquid tastes uniformly sweet
Diffusion
O2 molecules move from the blood where concentration is high, into a cell where the concentration is lower
Diffusion
Glucose moves from a high concentration outside into a lower concentration inside red blood cells using a protein embedded in the cell membrane because it is too large to pass freely
Facilitated diffusion
High to low using membrane protein- passive
Liver cells are packed with glucose. The concentration of the glucose ina liver cell is higher than the surrounding fluid, the cells imports even more glucose inside
Active transport
Low to high using energy- active
