Chapter 5,6,7 Flashcards
(76 cards)
may be linear or cyclic
Metabolic pathways
T/f: living organisms constantly make energy
False
T/f: pinocytosis is a type of endocytosis that moves fluid
True
T/f: cofactors assist some enzymes in proper functioning
True
T/f: all digestive enzymes work best in acidic pH
False
T/f: biologist use the concept of entropy as it applies to chemical bonding
True
T/f: in feedback inhibition, an activity is decreased or stopped by the results from that activity
True
T/f: Energy tends to concentrate spontaneously
False
T/f: cell membranes are made entirely from phospholipids
False
T/f: environmental factors control enzyme activity by reducing the reactions activation energy
False
T/f: diffusion occurs more slowly at lower pressures
True
T/f: enzymes force reactions to occur
False
T/f: osmosis requires no energy input
True
T/f: Endergonic reactions release energy
False
T/f: the more a person drinks, the fewer liver cells are available to break down alcohol
True
In allosteric regulation, enzymes are controlled by _________
A substance binding outside the active site
Where does most of the energy that fuels live come from originally
Sunlight
What type of membrane trafficking is a selective means of engulfing large molecules
Receptor-mediated endocytosis
Organic cofactors are called_________
Coenzymes
Too much salt interferes with enzymes by___________
Interfering with hydrogen bonds
When a chemical bond forms, what happens to the entropy of the atoms?
It decreases
One molecule accepts electrons from another during a________reaction
Redox
According to the first law of thermodynamics, energy can neither be ________ nor________
Created, destroyed
Which type of membrane protein responds to external signals?
Receptor proteins
