Unit I Test Preview

Consider the levels of organization of the biological world and place each of these items in order from narrowest level of organization to most encompassing: skin cell, elephant, water molecule, plat earth, tropical rainforest, hydrogen atom, wolf pack, and liver.

Hydrogen atom, water molecule, skin cell, liver, elephant, wolf pack, tropical rainforest, planet Earth

The plasma membrane is composed of several different macromolecules. Which macromolecule serves as the fluid interface between the intracellular and extracellular environments?

Lipids

Hydrolysis is involved in which of the following?

The digestion of sucrose, a disaccharide to its monomers of glucose and fructose.

Water is an excellent solvent. Select the property that justifies this statement.

As a polar molecule, it can surround and dissolve ionic and polar molecules

Recall the structure of a typical amino acid and how the molecule has two distinct "ends". Which two functional groups are always found in amino acids?

Carboxyl and amine

Which categories of amino acids would you expect to find on the surface of a soluble protein and which would you expect to find in the interior?

Polar and charged amino acids will be found on the surface whereas nonpolar will be found in the interior.

What structural level of proteins is functional and why?

The tertiary structure is functional,as it possesses the geometric shape showing the necessary loops and bends.

A group of AP Biology students is testing the effect of temperature on catalase activity in cells, In cells, catalase breaks down hydrogen peroxide into water and oxygen gas. Which of the following most likely occur in the experimental group that is cooled to 10 degrees Celsius.?

There will be a decrease in product formation since this will denature the enzyme and the reaction will not occur.