Chapter 6 biology

How many electrons can a carbon atom share?

4

The total number of atoms in a molecule of sucrose, C12H22O11, is____.

45

What are the basic building blocks of proteins?

Amino acids

Glucose and fructose, with the formula C6H12O6 differ in_____.

Arrangements of atoms

Which of the images in Figure 6-4 depicts dynamic equilibrium?

C. The equal arrows

Glucose polymer that forms the cell walls of plants is ____.

Cellulose

Diffusion continues until there is no____.

Concentration gradient

When molecules of glucose and fructose combine to form sucrose, they do so by_____.

Condensation

Which one of the following compounds may be polymers? A.Carbohydrates C.Proteins B.Nucleic acids D.All of these

D.All of these

An unsaturated lipid contains____.

Double bonds

Electrons move about the nucleus of an atom in regions called____.

Electron clouds

A chlorine atom becomes a chloride ion when it____.

Gains an electron

Which element would need to be removed from the molecule in Figure 6-5 to make it unsaturated?

Hydrogen

_____represents a formula for a chemical compound.

H²O

Carbon-12, carbon-13, and carbon-14 are_____.

Isotopes

Unlike carbohydrates and fats, proteins contain_____.

Nitrogen

Center of an atom is___.

Nucleus

Carbon compounds that come from living organisms are called_____compounds.

Organic

Bond formed between amino acids is ____.

Peptide bond

Molecule with unequal distribution of charge is___.

Polar molecule

Water dissolves many ionic and molecular compounds because of its____.

Polarity

Which of the the following does not describe a polymer?

Polymers are broken down by the process of hydrogenation.

The various enzymes in our bodies are____.

Proteins

The nucleus of an atom contains____.

Protons and neutrons

Brownian motion is evidence of____.

Random motion of molecules