Chapter 9: Cellular Respiration Questions from Notes Flashcards
Where do organisms get energy?
Organisms get the energy they need from food.
Food molecules contain ________ energy.
chemical
The chemical energy in food molecules is released when the bonds are ______.
broken
When are the bonds broken in food molecules?
The bonds are broken in food molecules during digestion.
A ______ is the amount of energy needed to raise the temperature of 1 gram of water by 1 degree C.
calorie
What are three types of molecules cells use for food?
fats, proteins, and carbohydrates
Cells break down food molecules _________.
Cells break down food molecules gradually.
The energy stored in food molecules ____, because their chemical structure bonds differ.
vary
Cells break down food molecules _________.
gradually
Cells use the energy stored in the chemical bonds to produce ___________ that power the activities of the cell.
compounds (such as ATP)
What is the squiggly thing in the mitochondria called?
Cristae
True or false: A human that doesn’t exercise will have cristae in cells that is “looser” than an active human.
True
What carries oxygen throughout the body?
Blood
Cellular respiration is the process that what?
Cellular respiration is the process that releases energy from food in the presence of oxygen.
Why can’t dead organisms digest food or go through cellular respiration?
Cellular respiration only occurs in the presence of oxygen.
What is the chemical reaction equation for cellular respiration?
6 O2 + C6 H12 O6 ______> 6 CO2 _ 6 H2O + energy
What is the chemical reaction equation in words for cellular respiration?
Oxygen + Glucose _______> Carbon dioxide (as a by-product, breathing) + water + energy
All fluids in the cell are _____-based.
water
What type of fluid is outside the cell?
extracellular
Why does the cell have to release chemical energy in food molecules gradually?
If the the cell released it at once, then most of the energy would be lost in the form of heat and light.
Photosynthesis and cellular respiration are _______ cycles.
opposite
What are the three main stages of cellular respiration?
Glycolysis, the Krebs cycle, and the electron transport chain
What is the translation of glycolysis?
“destroy the sweet”
Does glycolysis require oxygen?
No, glycolysis does not require oxygen.