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1.2 Which of the following statements describes the relationship between nucleic acids, amino acids, and proteins?

A. Nucleic acids provide the code to produce amino acids that form proteins.
B. Proteins are formed from specific amino acids that are encoded by nucleic acids found in a particular sequence.
C. Amino acids can be used in place of nucleic acids to make proteins.
D. Proteins are made from nucleic acids that are coded for by amino acids.

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1.2The shape and function of proteins is due to the sequence of amino acids that comprise each protein. Each amino acid has unique chemical properties that cause it to interact with other amino acids in the protein sequence in a certain way, and these interactions drive the protein to fold into certain shapes. Some amino acids are hydrophobic, and some are hydrophilic. If a protein is compised of mostly hydrophobic amino acids, how might you predict this protein would behave in an aqueous environment?

A. The hydrophobic components of the protein would be unaffected by the aqueous environment.
B. The hydrophobic components of the protein would fold toward the hydrophilic components of the protein.
C. The huydrophobic components of the protein would fold away from the aqueous environment.
D. The hydrophobic components of the protein would fold out toward the aqueous environment.

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During active transport, what kind of protein binds to a substance to help move the substance across the plasma membrane?

A. carrier
B. channel
C. intracellular
D. receptor

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Both diffusion and osmosis are examples of passive transport. Both of the processes move from high concentration to low concentration until equilibrium is reached. What is the difference between these two types of passive transport?

A. Diffusion moves water across the membrane.
B. Osmosis is movement of small particles.
C. Osmosis is movement of water molecules.
D. Osmosis is movement of gas molecules.

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In order for the plasma membrane to be semipermeable, the phospholipid molecules in the membrane are arranged with...

A. hydrophobic heads and hydrophilic tails.
B. hydrophilic heads and hydrophobic tails.

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