Flashcards in Chapter 2 Quiz Deck (13)
In an atom, the number of protons always equals the number of:
Isotopes of an element differ due to the number of:
A combination of two or more atoms of the same type is called:
T or F: Water makes up 60-70% of total body weight.
Which of the following characteristics of water is most responsible for the sinking of the Titanic:
• The temperature of liquid water rises and falls slowly
• Water has a high heat of evaporation
• Water is liquid at room temperature
• Frozen water is less dense than liquid water
• Water molecules are cohesive
Frozen water is less dense than liquid water
T or F: A solution with a pH of 7 has 10 times as many H+ as a pH of 6.
False; The presence of H+ results in more acidity and the higher the number, the less H+ present in the solution.
Which of the following is not one of the four classes of organic molecules found in cells?
• Nucleic acids
T or F: A hydrolysis reaction involves the loss of water.
Starch, cellulose, and glycogen are alike in that:
They are all made of glucose
T or F: Fats are usually of animal origin while oils are usually of plant origin,
The monomer unit of a protein is:
An alpha helix or a beta sheet are examples of what level of protein structure?