Biology chapter 2 review questions

Which of the following statements is false?

Water is the most abundant atom in earth's atmosphere.

The monomers that make up proteins are called

amino acids

Which type of bond represents a weak chemical bond

hydrogen bond

Cellulose and starch are examples of

polysaccharides

Phospholipids are important components of

the plasma membrane of cells

Using a pH meter, you find the pH of an unknown solution to be 8.0. How would you describe this solution?

weakly basic

The pH of lemon juice is about 2.0 whereas tomato juice's pH is about 4.0. Approximately how much of an increase in hydrogen ion concentration is there between tomato juice and lemon juice

100 times

An isotope of sodium (Na) has a mass number of 22. How many neutrons does it have?

11

Magnesium has an atomic number of 12. Which of the following statements is true of a neutral magnesium atom?

It has 12 protons, 12 electrons, and 12 neutrons.

How many neutrons do (K) potassium-39 and potassium-40 have, respectively

Potassium-39 has 20 and Potassium-40 has 21

An example of a monosaccharide is

fructose, glucose, galactose