Exam 3: The Chemical Building Blocks of Life

$\alpha$ - glucose is present in potatoes and $\beta$ - glucose is present in wood.Both are glucose molecules but one can be used by humans to synthesize ATP and one cannot.Based on this information, what is the best explanation on why humans can only digest one of the glucose types?

The digestive enzyme pepsin works in the acidic environment of the stomach to hydrolyze peptide bonds.As a result, pepsin affects which macromolecule?

Which amino acid is most soluble in water?

Hemoglobin transports oxygen in the blood and consists of a chain of 146 amino acids.How many different types of amino acids are used to construct proteins?

These biological compounds are non-polar and insoluble in water:

The nitrogenous base that is only found in DNA and not in RNA is: rev: 02_22_2014_QC_45858

Chitin, a modified form of cellulose, is not only cross-linked with proteins but its glucose units are modified with atoms of:

Yogurt contains galactose and glucose, which are generated when bacterial enzymes act on milk sugars.What is the main source of the galactose in yogurt?