WATER PROPERTIES
Water molecules are described as this because they have an uneven distribution of electrical charge
Polar
The monomers that make up nucleic acids are called these
nucleotides
This nucleic acid usually exists as a double-stranded molecule
DNA
This property allows water to dissolve many ionic and polar substances
Water as a solvent
A DNA molecule contains 30% adenine. What percentage of the bases are thymine?
30%
The attraction between water molecules is caused by these intermolecular forces
Hydrogen bonds
A nucleotide contains a phosphate group, a nitrogenous base, and this five-carbon sugar
pentose sugar
This nitrogenous base replaces thymine in RNA
Uracil
Water moving upward through plant xylem is explained by what water property?
If a DNA sample contains 20% guanine, what percentage is cytosine?
20%
Water molecules sticking to each other is called this property
Cohesion
These are the four nitrogenous bases found in DNA
A,C,G,T
The sugar found in DNA is called this
deoxyribose
Water sticking to the walls of a container or plant xylem is called this?
Adhesion
A scientist heats DNA and observes that the two strands separate. What interactions were disrupted?
Hydrogen bonds between complementary bases
What organ allows bony fish to retain more gas and have less density?
Swim bladder
The bond connecting nucleotides together in one strand of DNA is called this
Phosphodiester bond
Adenine pairs with thymine through how many hydrogen bonds?
Two
What is the force that gas & liquids apply to substances trying to displace the gas & liquids?
Buoyancy
Why can DNA store genetic information while maintaining a stable structure?
The base sequence stores information, while the sugar-phosphate backbone provides structural stability
Surface tension is able to happen because surface molecules have net ______ force as a result of cohesive forces not pulling the molecules upward?
Inward
DNA strands running in opposite directions (5'->3', 3'->5') are called what?
Antiparallel
In DNA, cytosine pairs with guanine. How many hydrogen bonds hold this base pair together?
Three hydrogen bonds
What is the name of the substance that allows lipids to travel is aqueous solutions?
Lipoproteins
A DNA sample has 40% adenine. Calculate the percentage of cytosine and explain your reasoning
10% cytosine. Adenine = 40%, so thymine = 40%. The remaining 20% is G + C, so C = 10%