4. Cellular Metabolism Flashcards
Which molecule is removed when linking two molecules together through dehydration synthesis?
Water
Which of the following molecules could be formed by dehydration synthesis?
dipeptide, polypeptide
Which of the following processes helps to break down some of our major nutrients like carbohydrates, proteins and lipids?
hydrolisis
The proteins that control the reactions of metabolism are:
enzymes
Choose the statement that is not true:
An enzyme-catalyzed reaction typically runs in only one direction (false). TRUE: The active site is the part of the enzyme where the substrate binds to; Often times, enzymes are named for the substrate it acts upon; enzymes are specific and can act only on its substrates.
Enzymes can work out of order to accomplish its metabolic pathway: (true or false)
False
An enzymes ability to recognize the substance upon which it will act seems to be based on:
molecular shape
An enzyme acts only on a particular substance that is called a:
substrate
the process of changing the shape of an enzyme to the point where it loses function is called:
denaturation
Which of the following can combine with an enzyme and activate it?
coenzyme, cofactor
what is a rate-limiting enzyme?
the first enzyme in a series
Where is chemical energy held?
it is held in the bonds between the atoms of molecules
In which step of cellular respiration do carrier molecules and enzymes extract energy and store it as ATP, releasing water and heat?
The electron transport chain
In which step of cellular respiration does pyruvic acid molecules enter mitochondria and carbon dioxide (CO2) and high energy electrons are released?
citric acid cycle
What is needed for pyruvic acid to enter the pathways for aerobic respiration?
O2 (oxygen)
