Bio II Final Practice Questions

A scientist conducts an experiment to test the theory that a vitamin could extend a person’s life expectancy. What is the dependent variable?

• the person's life-expectancy
• the amount of vitamin
• the theory
• the scientist

When news of a scientific discovery is reported, readers must assess the credibility of the claim. In general, which statement indicates a valid and credible claim?

• The scientist followed strict standards of investigation and scientific methodology throughout the research.
• The scientist assured that the experiment was broad in scope by testing many variables in each trial.
• The scientist restated the hypothesis after performing the trial in order to have a more accurate hypothesis.
• No other scientists replicated the experiment to avoid the legal issues of patent infringement.

Tags

NGSS.HS-ESS3-5

NGSS.HS-PS4-3

Which of the following is a characteristic of living things?

• They grow and develop
• They respond to the environment
• They are made up of cells
• All of these

Tags

NGSS.HS-LS1-3

NGSS.HS-LS1-4

What is the study of life?

• Biology
• Ecology
• Zoology
• Botany
• Geology

Scientists share findings with other scientists by publishing their hypotheses, experimental methods, results, and analysis in peer-reviewed scientific journals. What is the importance of this step in scientific investigations?

• It allows researchers to share ideas and certifies that the work meets standards of the scientific community.
• It allows researchers to share ideas and certifies that their work is correct.
• It is restricted to final proven experimental results by established scientists.
• It is not recommended, as sharing ideas would give away the results to competitors.
• It helps ensure that scientists will read journals.

Which property of water BEST explains how salt is able to dissolve easily in water?

• Water is a polar molecule.
• Water has a high surface tension.
• Water is a compound of hydrogen and oxygen.
• Water is a nonpolar molecule.
• Water has a high heat capacity and melts the salt.

Tags

NGSS.HS-ESS2-5

Human blood has a pH of 7.4. How do buffers in the blood affect the pH?

• Buffers prevent small amounts of acid or base from changing the pH of blood.
• Buffers are acids that cause the pH of blood to decrease.
• Buffers are bases that cause the pH of blood to increase.
• Buffers are catalysts that prevent chemical reactions from changing the pH of blood.
• All of these are correct

Tags

NGSS.HS-LS1-3

A map of eastern North American, showing the pH of rainfall in various states, indicated that the pH of rain in New York State varied from 4.22 to 4.40. According to these figures, the most acidic rainfall in New York State has a pH of

• 4.22
• 4.30
• 4.35
• 4.40
• None of these are correct

What allows the three atoms in a water molecule to stay together?

• covalent bonds formed by shared electrons between atoms
• covalent bonds formed by electrons that transfer between atoms
• ionic bonds formed by electrons that transfer between atoms
• hydrogen bonds formed only by the electrons of the hydrogen atoms
• None of these are correct

Tags

NGSS.HS-PS1-1

A team of scientists and engineers is working together to develop a new cleaning product. The team has identified a species of bacteria that gets energy by breaking apart lipids and oils. The team wants to isolate the key substance that the bacteria use for this process, and then adapt the substance for the new cleaning product. Which macromolecule should the team try to isolate from the bacteria?

• a protein that specifically binds lipids or oils
• a lipid or oil that is unique to the bacteria
• a carbohydrate that is about the same size as a typical lipid or oil molecule
• a nucleic acid that codes for the production of a lipid or oil
• None of these are correct