Molecules of Life

Fatty acids are made from what key components?

• amino acid group and hydrocarbon chain
• carboxylic acid group and nitrogen chain
• phosphate group and hydrocarbon chain
• carboxylic acid group and hydrocarbon chain

In biology, glycerol is found where?

• in the mitochondria
• in the cytoplasm
• cell membranes
• in the nucleus

What are the 4 primary elements of organic life?

• carbon, hydrogen, oxygen, and phosphorus
• nitrogen, sulfur, phosphorus, and potassium
• carbon, hydrogen, oxygen, and nitrogen
• carbon, oxygen, nitrogen, and calcium

What are the 4 primary categories of macromolecules?

• sugars, amino acids, fats, and starch

• carbohydrates, lipids, proteins, nucleic acids
• fats, cellulose, amino acids, and carbonic acid

• amino acids, cellulose, lipids, and monosaccharides

Hydrolysis involves ___ whereas dehydration synthesis involves ___.

• breaking down molecules by adding water; building molecules by removing water
• breaking down molecules by adding oxygen; building molecules by removing oxygen
• breaking down molecules by adding heat; building molecules by removing heat
• building molecules by adding water; breaking down molecules by removing water

Saturated fats are ___ at room temperature whereas unsaturated fats are ___ at room temperature.

• melted, frozen
• hard, soft
• solid, liquid
• liquid, solid

At what point does a protein structure become functional?

• In its 1y form

• In its 2y form

• In its 3y form

• None of the above are correct

Purines include ___ whereas Pyrimidines include ___.

• thymidine, adenine; cytosine, guanine

• cytosine, uracil; thymidine, adenine

• uracil, adenine; guanine, cytosine, thymine

• adenine, guanine; cytosine, thymine, uracil