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