Q: Which of the following is a correct formula for calculating the atomic mass of an atom?

$$\text{Atomic mass} = \text{number of protons} + \text{number of neutrons}$$

Question 1

Which of the following best describes Pasteur's Quadrant in scientific research?

Accepted Answer

High theory, high practice; use-inspired basic research

Question 2

Which of the following is NOT a characteristic shared by all living things?

Accepted Answer

Ability to photosynthesize

Question 3

A scientist discovers a unicellular organism with a cell wall, no internal membrane-bound organelles, and a tubular structure. Which domain does this organism most likely belong to?

Accepted Answer

Archaea

Question 4

Which statement best explains why entropy is important in biological systems?

Accepted Answer

Entropy is connected to the second law of thermodynamics and requires organisms to use energy to maintain order

Question 5

Which of the following is a correct formula for calculating the atomic mass of an atom?

Accepted Answer

$$	ext{Atomic mass} = 	ext{number of protons} + 	ext{number of neutrons}$$

Question 6

Which of the following best describes the difference between covalent and ionic bonds?

Accepted Answer

Covalent bonds involve sharing electrons, while ionic bonds involve the transfer of electrons

Question 7

Which of the following statements about water is correct?

Accepted Answer

Water is a polar solvent, which allows it to dissolve many molecules

Question 8

A solution has a pH of 5. What is the concentration of hydrogen ions $$[H^+] in $$this solution?

Accepted Answer

$$1 	imes 10$$^{-5}$$ M

Question 9

Which of the following is a real-world example of how weak chemical interactions are important in biology?

Accepted Answer

Protein folding due to van der Waals interactions

Question 10

Which of the following best explains why biological buffers are important in living organisms?

Accepted Answer

Buffers minimize changes in pH, helping maintain homeostasis

Question 11

Which of the following is true about the relationship between electrons and chemical reactivity?

Accepted Answer

Atoms with incomplete valence shells tend to form chemical bonds to achieve stability

Question 12

Which of the following is a correct statement about the domains of life?

Accepted Answer

Archaea and Bacteria both lack internal membrane-bound organelles

Question 13

Which of the following best describes the process of evolution by natural selection?

Accepted Answer

Heritable changes that increase fitness are passed to future generations

Question 14

Which of the following is a correct statement about the structure of an atom?

Accepted Answer

Protons have a positive charge and are found in the nucleus

Question 15

Which of the following is a correct statement about pH and acidity?

Accepted Answer

A solution with pH 5 has a higher concentration of $$[H^+]$$ than a solution with pH 9

Question 16

Which of the following is a correct statement about the organization of living systems?

Accepted Answer

Organization in living systems requires energy, matter, chemical reactions, and information

Question 17

Which of the following is a correct statement about the role of DNA in living organisms?

Accepted Answer

DNA is sometimes called genetic information because it encodes genes

Question 18

Which of the following is a correct statement about the biosphere?

Accepted Answer

The biosphere includes ecosystems, communities, populations, and organisms

Question 19

Which of the following is a correct statement about the relationship between structure and function in proteins?

Accepted Answer

The shape of a protein determines its specific function

Question 20

Which of the following is a correct statement about the importance of hydrogen bonds in water?

Accepted Answer

Hydrogen bonds give water a high specific heat capacity

General Biology: Foundations, Chemistry, and the Nature of Life

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