Biology 1
Oxygen atoms in water molecules are also attracted to ___________ atoms in other water molecules.
hydrogen
ATP contains more energy than ________.
ADP
What property of water is most responsible for water moving from the roots to the leaves of a plant?
Adhesion
Catalysts ____________ the activation energy of a reaction.
decrease
Catalysts ______ _______ ___________the difference of energy in a reaction.
do not affect
Which pair of molecules are both compounds?
a. H2, CO2
b. H2O, N2
c. CO2, H2O
d. O2, C6H12O6
c. CO2 and H2O
What is a true statement we can make about the bonding of carbon atoms?
Carbon has the ability to form up to 4 bonds.
Catalysts are used by cells to ____________ the rate of reactions that help the cells maintain homeostasis.
increase
Catalysts themselves are not _____________ in the reaction.
consumed
In a water molecule, oxygen has a slightly _________
charge.
negative
What is the role of energy in cellular respiration?
The cell transfers stored chemical energy to different chemical bonds.
What elements are expected to be found in fructose?
carbon, hydrogen, and oxygen
What is the difference between active and passive transport?
Active transport requires an input of energy such as ATP to move the substance across the membrane.
In a water molecule, hydrogen has a slightly ____________ charge.
positive
In a water molecule, we describe it as a polar molecule that dissolves other ___________ ___________.
Polar molecules
What are 3 types of transport that cells use to move molecules across a membrane?
diffusion, passive transport, active transport
Waxes are useful for ________ __________ ________ because they are composed of long chain lipids which are non polar and very hydrophobic.
Protective waterproof coatings.
Phospholipids are useful for ____________________________________________
because they are composed of polar heads and non polar tails.
providing a selectively permeable membrane
Simple carbohydrates are use for ____ _________ _____ __________ _____ _______ _______ because they are composed of structures that can be quickly broken down.
a source of energy for the cell
Compared with the inputs of photosynthesis, the molecules that are outputs of photosynthesis will have ____ ______ total number of atoms ____ ________ combined mass, and ___________ chemical properties. The energy stored in the chemical bonds of the output molecules, as compared to the energy in the bonds of the input molecules, will be ____________.
the same, the same, different, different
A scientist adds radioactive oxygen to different parts of the environment in which he grows his plants. Based on the equation :
(6CO2 +12H2O*+energy=C6H1206+6O2*+6H2O), adding radioactive oxygen in which component would produce radioactive glucose?
The should add it to the air.
What is one true statement we could make about amino acids?
(Name one)
1. Their structure is coded for in DNA.
2. Amino acids bond to form proteins.
Are the following inputs or outputs of cellular respiration?
a. ATP b. glucose c. water d. carbon dioxide
ATP-output
glucose-input
water-output
carbon dioxide-output
A chemist is studying a reaction between a lipid an an oxygen. The chemist compared the reactants to the products. He finds that the mass of the products is equal to the mass of the the reactants. Explain why this is so.
Because mass is conserved in a chemical reaction.
Name two pieces of evidence that a chemist would look for to indicate that energy was released.
1. Light given off-energy released.
2. Material heated up-energy released.