General Biology Unit 3 EXAM – Biochemistry (40pts)

What are the six most important elements whose chemical combinations make up 98% of the molecules found in living organisms?

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

• carbon, hydrogen, neon, oxygen, plutonium, and sodium

• carbon, calcium, phosphorus, potassium, helium, and hydrogen

• carbon, calcium, copper, chromium, chlorine, and cadmium

All organic compounds contain what element?

• nitrogen

• oxygen

• carbon

• hydrogen

Initially when Miller-Urey set-up their experiment they had one flask with water to represent the ocean, and a second flask of gasses to represent the atmosphere ... but nothing happened. Miller-Urey were only able to detect molecules of life being created in their experiment after they ...

• cooled down the temperature of the water to prevent any molecules formed from breaking down

• decreased the pressure of the gasses to mimic the fewer number of molecules in the atmosphere

• added rocks and minerals to create surfaces for chemical reactions or occur

• added an electric spark to simulate lighting, an abundant process in the atmosphere of early Earth

What is the purpose of the Nucleic Acid biomolecules?

• provide quick energy for a cell

• used as a source for emergency energy and creates a waterproofing barrier

• carry genetic information

• perform signaling, motor, transport, and enzymatic processes throughout the cell

What is the purpose of the Protein biomolecules?

• provide quick energy for a cell

• used as a source for emergency energy and creates a waterproofing barrier

• carry genetic information

• perform signaling, motor, transport, and enzymatic processes throughout the cell

What is the purpose of the Carbohydrate biomolecules?

• provide quick energy for a cell

• used as a source for emergency energy and creates a waterproofing barrier

• carry genetic information

• perform signaling, motor, transport, and enzymatic processes throughout the cell

What is the purpose of the Lipid biomolecules?

• provide quick energy for a cell

• used as a source for emergency energy and creates a waterproofing barrier

• carry genetic information

• perform signaling, motor, transport, and enzymatic processes throughout the cell

Which two of the four biological molecules share a similar function of providing energy for the cell?

• proteins and carbohydrates

• lipids and carbohydrates

• proteins and nucleic acids

• lipids and nucleic acids

What is the name of the monomer molecule used to build Lipids?

• monosaccharide

• amino acid

• fatty acid chain

• nucleotide

What is the name of the monomer molecule used to build Carbohydrates?

• monosaccharide

• amino acid

• fatty acid chain

• nucleotide