Superior Capillaries of Vena CAVA head and forelimbs Pulmonary artery Pulmonary \` Aorta artery Capillaries of right lung Capillaries of left lung...

1.

Human beings have disrupted the sulfur cycle by

a. allowing deforesting to continue in the Amazon

b. burning coal to produce power

c. overusing detergents

d. polluting the watershed with fertilizers

2.

Which of the following is NOT a way in which amino acid structure and sequence might affect the properties of a protein?

a. Amino acid side chains form peptide bonds with each other, causing the molecule to twist into a secondary structure.

b. Amino acid side chains interact with each other, causing polypeptides to bend into a tertiary structure.

c. Hydrogen bonding between every fourth amino acid results in the formation of a coil called an α helix.

d. Hydrogen bonding between strands of parallel polypeptide chains causes ß-pleated sheets to form.

3.

While monosaccharides typically all have a molecular formula that is a multiple of CH2O, they differ in factors such as the length of the carbon skeleton or the orientation of their atoms around asymmetric carbon atoms. What is the impact of this variation in molecular structure?

a. Different monosaccharides will form disaccharides with the same properties.

b. Cells will use more energy to metabolize a wider variety of polysaccharides.

c. Molecules that all share the same bonding pattern but have different properties will be produced.

d. Sugars with different properties that can build a wide variety of carbohydrates will result.

4.

Below is a diagram of the mammalian cardiovascular system: 

Regarding the diagram of the cardiovascular system, which of the following is true?

a. Areas 2 and 3 are the pulmonary circuit.

b. Area 6 has greater oxygen than anywhere else in the systemic circuit.

c. Blood pressure is higher in area 10 than in area 7.

d. Gas exchange occurs in area 5.

5.

A population of 13 birds exhibits linear growth, with an average growth rate of 2.4 individuals per year. If environmental conditions and growth rate remain the same, how long would it take the population to increase to 156 birds?

a. 0.20 years