Exam 3: Biological Molecules

Soap and detergent molecules have a long, hydrophobic tail and a polar, hydrophilic head. They are sometimes referred to as bridge molecules because they allow oils and fats to be suspended and dissolved in water (which they otherwise would not be able to do). Imagine that you are using soap to wash away dirt that is being held against your skin in an oily film. -In this scenario, how are the soap, dirt/oil, and water arranged at the molecular level?

Which of the following correctly matches an organic polymer with its monomers, respectively?

Which of the following is an example of a protein?

You are telling your friend that organic molecules are all made up of carbon backbones with hydrogens. She doesnʹt understand how there can be so many different organic molecules if they all are made up of the same basic components. You explain that organic molecules

Which type of lipid is most important in biological membranes?

A nucleotide is made of a

Which of these biological molecules contain genetic information?

As shown in this figure, the valine and lysine in this protein are linked by covalent bonds within the_________ structure, whereas the hydrogen bonds hold together molecules within the helical _________structure.

How do two amino acids, such as lysine and methionine, differ from each other?

Which of the following can serve as an energy source and as structural support in plant cells?

The group of biological molecules that are most diverse in function is

Which of the following refers to the amino acid sequence of proteins?

In humans, dental cavities form when Streptococcus mutans bacteria in the mouth hydrolyze sucrose. Which of the following is (are) the products of this reaction?

A denatured protein differs from a normal protein because it

Cell membranes are an example of a lipid bilayer. In this lipid bilayer, both the outside of the cell and the inside of the cell are in nature.

Triglycerides are

Which of these is NOT a nucleic acid or nucleotide?

The fat substitute Olestra contains a sucrose backbone with six to eight fatty acids attached. How is this different from a naturally occurring fat?

If digestion_________ is , then synthesis is _________.

Prions are known to cause