3/15 daily eoc review

Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enable it to move from the roots to the leaves of plants?

• Water expands as it freezes.

• Water is an excellent solvent.

• Water exhibits cohesive behavior.

• Water is able to moderate temperature.

Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?

• Water is an acid.

• Water is a versatile solvent.

• Water acts as a buffer.

• Water has a high heat capacity.

Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect?

• Water absorbs heat when it evaporates and forms a gas

• Water expands and becomes less dense when it freezes.

• Water molecules completely separate into ions in solutions

• Water forms hydrogen bonds with ions and other polar substances.

Water is often called the "universal solvent" because many substances can be dissolved in water. What properties of water allow it to be such a versatile solvent?

• purity and polarity

• polarity and cohesion

• high heat capacity and adhesion

• expansion upon freezing and solvency

Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature?

• Water is a good solvent.

• Water exhibits strong cohesion.

• Water has an unusual crystalline structure.

• Water has a high capacity for heat.

Two of the four principle classes of organic compounds are proteins and nucleic acids. What is the relationship between proteins and nucleic acids?

• Nucleic acids use proteins for energy

• Nucleic acids are a subset of proteins

• Proteins are long polymers of nucleic acids

• Nucleic acids contain the information to make proteins

Resistance to antibiotics results from variations in the genetic code of Streptococcus pneumoniae. Which type of molecule encodes genetic information in Streptococcus pneumoniae?

• carbohydrate

• fatty acid

• nucleic acid

• protein

Which of the following diagrams below is an example of a carbohydrate?

• 1

• 2

• 3

• 4

In living organisms, lipids function mainly as:

• Sources of stored energy and transmitters of genetic information

• Sources of stored energy and components of cellular membranes

• Transmitters of genetic information and catalysts of chemical reactions

• Catalysts of chemical reactions and components of cellular membranes

In the diagram, what is the building block of structure G?

• nucleotides

• chains of fatty acids

• amino acids

• fatty saccharides