Biomolecules

The start codon on mRNA is always______and this codes for the addition of________ as the first amino acid in every polypeptide

________ have more energy per gram than carbohydrates and are excellent heat insulators.

Which disaccharide is made up of glucose and fructose joined by a glycosidic bond?

• Maltose

• Galactose

• Sucrose

• Lactose

Which of the following is true about trans-isomers?

• They are produced when polyunsaturated fatty acids from plants are "partially hydrogenated" chemically.

• They are produced when saturated fatty acids from plants are "partially hydrogenated" chemically.

• They are produced when polyunsaturated fatty acids from plants are "completely hydrogenated" chemically.

• They are produced when saturated fatty acids from plants are "completely hydrogenated" chemically.

Which statement is true?

• Carbohydrates contain more energy per gram than lipids.

• Lipids are more insoluble in water compared to carbohydrates which are more soluble in water.

• Lipids are used for short term energy storage while carbohydrates are used for long term energy storage.

• Lipids are primarily used for energy while carbohydrates are primarily used for thermal insulation.

A long chain of many glucose molecules is also referred to as a:

• Polypeptide

• Triglyceride

• Polysaccharide

• Monopeptide

How many water molecules would be released from the condensation reaction shown?

• 3

• 1

• 8

• 24

What type of fatty acid is shown in this diagram?

• Saturated cis.

• Saturated trans.

• Unsaturated cis.

• Unsaturated trans.

Which of the following are examples of quarternary proteins?

• Hemoglobin and valine

• Hemoglobin and rubisco

• Rubisco and amylase

• Valine and amylase

Hydrophobic R groups of globular proteins are usually:

• Exposed on the cell-surface, since most globular proteins are membrane-embedded.

• A great starting point for the interaction with other globular proteins.

• Folded into the protein core, since most globular proteins are water-soluble.

• Exchangeable with other R groups to provide flexibility to the protein structure.