TEAS Science Practice Test #2

Question 1

What would this diagram be useful for?

Accepted Answer

determining outcomes for potential infection

Answer

Without the actual diagram, we infer its purpose from the correct answer. A diagram useful for 'determining outcomes for potential infection' would likely be a flowchart or decision tree that guides a user through various symptoms, test results, or exposure scenarios. By following the paths in the diagram, one could predict the probable course, severity, or specific type of infection, helping to understand potential future developments rather than providing an immediate diagnosis or control strategy.

Question 2

What type of bond between the complementary bases of DNA stabilizes the double helix structure?

Accepted Answer

hydrogen

Answer

The double helix structure of DNA is primarily stabilized by hydrogen bonds that form between complementary nitrogenous bases. Adenine (A) always pairs with Thymine (T) via two hydrogen bonds, and Guanine (G) always pairs with Cytosine (C) via three hydrogen bonds. These relatively weak but numerous bonds collectively provide the necessary stability to maintain the DNA's helical shape, while also allowing the strands to separate for replication and transcription.

Question 3

Which of the following subatomic particles are found inside of an atom’s nucleus?

Accepted Answer

neutrons, protons

Answer

An atom's nucleus is the dense, central core that contains two types of subatomic particles: protons and neutrons. Protons carry a positive electrical charge, while neutrons are electrically neutral, meaning they have no charge. Electrons, which carry a negative charge, are found orbiting the nucleus in electron shells, not within the nucleus itself.

Question 4

Which of the following statements is true regarding trophic levels?

Accepted Answer

Tertiary consumers acquire less energy than primary consumers.

Answer

Energy transfer between trophic levels is highly inefficient, following the '10% rule' where only about 10% of the energy from one level is transferred to the next. Primary consumers acquire energy directly from producers. Tertiary consumers are several steps removed from the original energy source, feeding on secondary consumers. Consequently, tertiary consumers receive a significantly smaller amount of the initial energy compared to primary consumers, resulting in less energy content at higher trophic levels.

Question 5

Why does the human eye perceive a red colored dress as the color red?

Accepted Answer

The molecules of the dress do not absorb red light wavelengths.

Answer

The color an object appears to be is determined by the wavelengths of light it reflects. When white light (which contains all colors) strikes a red dress, the molecules in the dress absorb most of the non-red wavelengths (like blue, green, and yellow). The red wavelengths, however, are not absorbed and are instead reflected off the dress. Our eyes then detect these reflected red wavelengths, causing us to perceive the dress as red.

TEAS Practice Test

TEAS Practice Test

TEAS Science Practice Test #2