Molecules * 2 points
a. react with acids and bases to keep pH in a range
b. made from repeating units of mostly identical compounds
c. group of atoms held together by covalent bonds
d. measures hydrogen ion concentration
e. what is being dissolved
f. macromolecule that gives us quick energy
g. macromolecule that builds and repairs
h. what is doing the dissolving
i. long chains of repeating subunits, called nucleotides
j. contain unequal areas of charge
k. building blocks of proteins
l. repeating subunits composed of carbon, nitrogen, oxygen, phosphorus, and hydrogen
m. large molecules formed by joining smaller organic molecules
n. have high concentration of hydrogen ions
o. have high concentration of hydroxide ions
p. another name for homogenous mixture

Interpret the model. a three-part model with black right-arrows between the parts. left part: a large green apple-shaped component with a w-shaped indentation centered on top. a small blue apple-slice shape sits above the left indentation and an arrow points from the shape to the indentation. a small purple apple-slice shape and arrow sit above the right indentation and an arrow points from the shape to the indentation. middle part: a large green apple-shaped component with a square indentation centered on top. sitting in the left side of the indentation is a blue apple-slice shape with a flat bottom, fused to a purple apple-slice shape with a flat bottom on the right side of the indentation. right part: a large green apple-shaped component with a w-shaped indentation centered on top. an up-arrow is centered above the indentation pointing to a fused blue and purple apple-slice-shaped flat-bottom component sitting above the indentation. assigne "true" or "false" to the end of each statement. the model shows a shape change occurring in the enzyme after the substrate is bound in the active site. t/fthere are two products in this model. t? f there are three substrates in this model. t/f the model shows two different enzymes. t/f

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?