Biomolecules

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

(a)  

(a)   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.