AP Bio.

a nucleotide in DNA is made up of

a base plus a deoxyribose sugar plus phosphate

the advantage of a controlled experiment is that

all variables are held constant except for one

which of the following pairs of functional groups characterizes the structure of an amino acid?

amine and carboxilid acid

which functional group is most likely responsible for an organic molecule behaving as a base?

amino

a molecule with the formaula C16,H30,O15 is a

carbohydrate

includes glycogens, chitin cellulose, and glucose

carbohydrates

for a covalent bond to be polar, the two atoms that form the bond must have

different electronegativities

which of the following best characterizes the reaction respresented by A+B+energy----> AB

endergonic reaction

compotitive inhibitors of enzymes work by

fitting in to the active sites

which of the following is responsible for the adhesive property of water?

hydrogen bonds between the oxygen atom of one water molecule and a hydrogen atom of another water molecule

the tertiary structure of a protein is determined by its

interactions among R groups

a reaction that has a negative delta G

is spontaneous

Which of the following is most directly responsible for water's unique properties?

it forms hydrogen bonds

used for insulation and bouyancy in marine animals

lipids

lipids form barriers surrounding various compartments within an organism. which property of lipids makes them a good barrier?

many biologically important molecules and ions are not soluble in liquids

the building blocks of carbohydrates are _____, and are covalantly linked together by _____.

monosaccharides, glycosidic linkages

if the potato solution was boiled for 10 minutes and cooled for 10 minutes befor being tested, the average time for the disks to float to the surface of the hydrogen peroxide solution would be

more than thirty seconds

used to carry the genetic code

nucleic acids

which of the following experimental designs should the students use as a control for the experiment

place a catalase soaked disk in a beaker of water

synthesize at the ribose

proteins

the main purpose of any single experiment is to

test a prediction that is based on a hypothesis

a controlled experiment is one that

test experimental and control groups in parallel

for a hypothesis to be scientifically valid, it must be ______ and it must be possible to ___ it.

testable;reject

which of the following best describes why the disks rose to the surfaces faster in the more concentrated hydrogen peroxide solutions

the higher substrate concentrations i the more concentrated solutions speeded the reactions

the ability of an atom to combine with other atoms is determined by

the number and distribution of electrons

enzymes that break down DNA catalyze the hydrolisis of the covalent bonds that join nucleotides together. What woukd happen to DNA molecules treated with these enzymes?

the phosphodiester linkages of the polynucleotide backbone would be broken

which of the following best describes why ice was used during this experiment?

the slow the breakdown of the catalase

which of the following statements concerning unsaturated fats is true?

they have double bonds in the carbon chains o there fatty acids

the function of cellulose, the most abundant organic compound on earth is,

to provide mechanical strength to plant cell walls

the synthesis of protein or carbohydrate polymers always produces which of the following as a byproduct?

water