Unit 2 Biological Molecules and Cell Organelles

This macromolecule, (a)   , plays an important role in the structure and function of the cell membrane.

• proteins
• nucleic acids
• lipids
• carbohydrates

This molecule provides the primary energy for the cells.

(a)  

• carbohydrates
• lipids
• proteins
• nucleic acids

The monomers of proteins are

• nucleotides

• amino acids

• monosaccharides

• fatty acids

Imagine you are a scientist studying biological molecules. You come across a molecule that stores genetic information. Which type of biological molecule could this be?

• protein

• carbohydrate

• lipids

• nucleic Acids

Which of the following could make one protein different to another protein?

I. the number of amino acids it contains

II. the sequence of amino acids

III. they contain amino acids

• I and II only

• I and III only

• II and III only

• I, II and III

A single unit of sugar is referred to as:

• Monosaccharide
• Monocarbohydrate
• Mononutrient
• Monopolymer

What type of carbohydrate is this?

• polysaccharide
• disaccharide
• monosaccharide
• it isn't a carbohydrate

This macromolecule is used for long term energy storage.

• protein

• simple carbohydrate

• complex carbohydrate

• lipid

A thin, flexible layer that is found in all cells and separates the inside of the cell from the outside environment.

• protein coat

• protein membrane

• cell membrane

• nucleolus

What is the function of the vacuole?

• Sac that stores water, nutrients, and waste products

• Jelly-like substance within the plasma membrane

• Sac filled with digestive chemicals

• Stack of membranes that packages chemicals