Anatomy CH02 - Quiz

atoms that form the main reactive area for a particular compound.

A functional group is best described as reoccurring clusters of

phosphate groups 1 and 2 and between phosphate groups 2 and 3.

A high-energy bond in ATP is present between

the backbone of RNA contains ribose.

The structure of RNA differs from DNA in that

thermal inertia

Which property of water helps keeps body temperature stabilized?

base; acid

A(n) ________ removes hydrogen ions and a(n) ________ releases hydrogen ions.

are the body's most readily available source of energy

Carbohydrate molecules

endergonic

Chemical reactions that absorb energy are called

exergonic

Chemical reactions that yield energy, such as heat, are said to be

free radicals

Cumulative damage from reactive ________ is thought to be a major factor in aging.

a calcium ion that has lost two electrons.

In chemical notation, the symbol Ca2+ means

quaternary

Interaction between individual polypeptide chains to form a protein complex is ________ structure.

- form essential structural components of cells. - help to maintain body temperature. - provide a significant energy reserve. - cushion organs against shocks.

Lipids

nuclei

Radioisotopes have unstable

1

Sodium (NA) has an atomic number of 11. How many electrons are in the outer electron shell of a neutral sodium atom?

amino acids

The monomers of protein are

endergonic

The reaction A + B + energy → AB is an example of a(n) ________ reaction.

Na2HPO4 adsorbs excess H+ and OH- directly onto the surface of its crystalline structure.

When a small amount of HCl or NaOH is added to a solution of Na2HPO4, the pH of the solution barely changes. Based on these observations, all of the following are true concerning the compound Na2HPO4, except

hydrogen

Which element commonly has only a proton as its nucleus?

Cl-

Which of the following is not a cation?