Q: A solution has a pH of 4. What is the concentration of hydrogen ions $$[H^+] in $$the solution?

$$[H^+] = 1 \times 10$$^{-4}$$ M

Question 1

Which of the following properties is common to all living organisms?

Accepted Answer

Composed of cells

Question 2

Which level of biological organization is immediately above the organ system?

Accepted Answer

Organism

Question 3

Which statement best describes the concept of emergent properties in biology?

Accepted Answer

Properties that arise from the interaction of simpler parts in a system

Question 4

Which molecule contains the genetic information of a cell?

Accepted Answer

DNA

Question 5

Darwin’s theory of descent with modification is most closely associated with which concept?

Accepted Answer

Natural selection

Question 6

A scientist wants to test the effect of a new fertilizer on plant growth. Which is the best example of a control group in this experiment?

Accepted Answer

Plants given no fertilizer

Question 7

Which of the following best describes a hypothesis?

Accepted Answer

A tentative answer to a well-framed question

Question 8

Which of the following is NOT a component of an atom?

Accepted Answer

Isotope

Question 9

If an atom has 6 protons, 6 neutrons, and 6 electrons, what is its atomic number and mass number?

Accepted Answer

Atomic number: 6, Mass number: 12

Question 10

Which of the following best describes a radioactive isotope?

Accepted Answer

An atom with an unstable nucleus that emits radiation

Question 11

How does the electron configuration of an atom influence its chemical behavior?

Accepted Answer

It determines the types and number of bonds the atom can form

Question 12

Which type of bond is formed when electrons are shared equally between two atoms?

Accepted Answer

Nonpolar covalent bond

Question 13

Water has a high specific heat. What does this mean for living organisms?

Accepted Answer

Water resists changes in temperature, helping to stabilize environments

Question 14

Which property of water allows insects to walk on its surface?

Accepted Answer

Surface tension due to hydrogen bonding

Question 15

A solution has a pH of 4. What is the concentration of hydrogen ions $$[H^+] in $$the solution?

Accepted Answer

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

Question 16

Which of the following best explains why carbon is unparalleled in its ability to form large, complex molecules?

Accepted Answer

Carbon can form up to four covalent bonds with other atoms

Question 17

Which of the following is an example of an organic compound?

Accepted Answer

Glucose ($$C_6H_{12}O_6$)

Question 18

Which statement best describes an isomer?

Accepted Answer

Molecules with the same molecular formula but different structures

Question 19

Which functional group is important for energy transfer in cells and is found in ATP?

Accepted Answer

Phosphate group ($$-PO_4$)

Question 20

A scientist is testing the effect of pH on enzyme activity. She measures enzyme activity at pH 4, 7, and 10. What is the independent variable in this experiment?

Accepted Answer

pH level

General Biology Study Guide: Foundations, Chemistry, and Water

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