Bio Chapter 2

Proteins are polymers of _____.

amino acids

The hydrolysis of a protein will produce ________.

amino acids

Polar molecules, like water, result when electrons are shared ________.

unequally between atoms

Trans fats increase the risk of heart disease because they have been solidified by the addition of hydrogen atoms. Originally, trans fats were oils and classified as ________

unsaturated fats

The reaction sucrose + water → glucose + fructose is an example of a(n) ________.

hydrolysis reaction

Hydrogen bonding between water molecules is responsible for ________.

surface tension

The complementary base to adenine in a molecule of DNA is ________.

Thymine

Which term best describes the sugar in a sugar-water solution?

solute

The atomic number of sodium is 11 while the atomic mass number is 23. Which of the following is not true of an atom of sodium?

11 neutrons present in the atomic nucleus

Rank these elements found in the human body from most common to least common: 1) carbon 2) hydrogen 3) nitrogen 4) oxygen

4, 1, 2, 3

Gastric juices produced by the stomach are strongly acidic. Without the neutralizing effect of fluids from the pancreas, the stomach acids could be absorbed directly into the blood. What would be a likely outcome for blood pH if this happened?

Blood pH would become 6.9

We often hear to protect our skin from the damaging ultraviolet radiation of the sun. In some cases, sun damage causes thymines next to each other bind instead of to their complementary base pairs. In which type of molecule would this damage be most problematic?

DNA

Which of the following is common to all elements?

atoms

The movement of ions across plasma membranes is an example of ________.

electrical energy

What is the name for the ability of living things to maintain a relatively constant internal environment?

homeostasis

Which of the following is not a subatomic particle associated with an atom? This may contain other non subatomic particles as answers. If you get the correct one it's the example from the quiz

ion

Which of the following elements is needed to make a functional hemoglobin molecule?

iron

The atomic mass number of an atom is equivalent to the number of ________ contained in its nucleus.

protons and neutrons

Which of the following are found in the nucleus of an atom?

protons and neutrons

Which of these nucleic acids carries out the orders for protein synthesis?

RNA