End of Q1 Gr 10 Test Part A

Which element is found in all organic compounds?

• nitrogen

• carbon

• phosphorous

• potassium

What type of chemical bond occurs between hydrogen and oxygen to form water molecules?

• ionic bond

• hydrogen bond

• covalent bond

• polar bond

All of the following statements are true regarding cell theory except

• All living things or organisms are made of cells

• All cells arise spontaneously

• The cell is the basic structural and functional unit of life

• All cells arise from preexisting cells

Cellulose is an example of a polysaccharide.

• true

• false

Which macromolecule is used as a main source of quick energy and sometimes for structural purposes?

• carbohydrate

• lipid

• nucleic acid

• protein

Proteins are polymers. Their monomers - amino acids - are held together by:

• glycosidic bonds

• nucleotide bonds

• peptide bonds

• non-polar bonds

Which macromolecule is not soluble in water (nonpolar), stores energy, and makes up part of cell membranes?

• carbohydrate

• lipid

• nucleic acid

• protein

In 2 or 3 sentences, describe the process of dehydration synthesis in biomolecules.

Nucleotides consist of a phosphate group, a nitrogenous base, and a ...

• 5-carbon (pentose) sugar

• 6-carbon (hexose) sugar

• fatty acid

• lipid

Attraction between molecules of the same substance is called ...

• adhesion

• cohesion

• polarity

• bonding