Question 1

Which of the following is NOT considered a property of living organisms according to the study of life?

Accepted Answer

Ability to photosynthesize

Question 2

According to the Cell Theory, which statement is correct?

Accepted Answer

All living organisms are composed of one or more cells

Question 3

Which of the following best describes a scientific hypothesis?

Accepted Answer

A statement that explains a specific observed event and can be tested

Question 4

Which equation correctly represents the dissociation of water into its ions?

Accepted Answer

$$\mathrm{H_2O} \rightarrow \mathrm{H^+} + \mathrm{OH^-}$$

Question 5

Which property of water is primarily responsible for its ability to dissolve many substances?

Accepted Answer

Its polar covalent bonds

Question 6

A scientist wants to test the effect of temperature on enzyme activity. Which of the following is the best example of a controlled variable in this experiment?

Accepted Answer

The concentration of the enzyme

Question 7

Which of the following statements about isotopes is TRUE?

Accepted Answer

Isotopes of an element have different numbers of neutrons

Question 8

Which of the following best explains why ice floats on water?

Accepted Answer

Hydrogen bonds in ice create a lattice structure that is less dense than liquid water

Question 9

Which of the following is a consequence of water’s high specific heat for living organisms?

Accepted Answer

Water resists changes in temperature, helping to stabilize internal and external environments

Question 10

Which of the following is a correct statement about polar covalent bonds in water molecules?

Accepted Answer

Oxygen atom attracts electrons more strongly than hydrogen, creating partial charges

Question 11

Which of the following is NOT a characteristic of a good experimental design?

Accepted Answer

Allowing uncontrolled variables to affect results

Question 12

Which of the following best describes the process of condensation (dehydration) reaction in macromolecule formation?

Accepted Answer

Monomers are joined together by removing a water molecule

Question 13

Which of the following is a function of buffers in biological systems?

Accepted Answer

Buffers help maintain homeostasis by minimizing changes in pH

Question 14

Which of the following statements about the evolutionary tree of life is correct?

Accepted Answer

Branches that share recent common ancestors represent closely related species

Question 15

Which of the following is an example of a hypothesis that can be tested experimentally?

Accepted Answer

Increasing sunlight exposure increases the rate of photosynthesis in plants

Question 16

Which of the following is a correct statement about the atomic structure of carbon?

Accepted Answer

Carbon has 6 protons and a variable number of neutrons depending on the isotope

Question 17

Which of the following is a real-world example of natural selection?

Accepted Answer

A population of bacteria develops resistance to antibiotics over several generations

Question 18

Which of the following best explains why water is an efficient solvent?

Accepted Answer

Water’s partial charges allow it to interact with and dissolve polar and charged molecules

Question 19

Which of the following statements about hydrogen bonds is TRUE?

Accepted Answer

Hydrogen bonds form between water molecules due to partial charges on oxygen and hydrogen

Question 20

A solution has a pH of 4. What is the concentration of hydrogen ions ($$[\mathrm{H^+}]) in $$this solution?

Accepted Answer

$$[\mathrm{H^+}] = 1 	imes 10$$^{-4}$$~\mathrm{M}$$

General Biology: The Study of Life and Chemistry of Biology – Structured Study Notes

Study Guide - Practice Questions

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