Q: How many grams of glucose ($$C_6H_{12}O_6$, molar mass = 180$$\ \mathrm{g/mol}$$) are needed to make 0.5 L of a 1 M solution?

$$180\ \mathrm{g/mol} \times 1\ \mathrm{mol/L} \times 0.5\ \mathrm{L} = 90\ \mathrm{g}$$

Question 1

Which of the following is NOT considered one of the properties of life?

Accepted Answer

Ability to photosynthesize

Question 2

Darwin observed that Galápagos finches had different beak shapes. According to natural selection, which of the following is required for these beak differences to evolve in a population?

Accepted Answer

Beak shape must be heritable and affect survival or reproduction

Question 3

A neutral atom of sodium has an atomic number of 11 and a mass number of 23. How many neutrons does it have?

Accepted Answer

$$23 - 11 = 12$$ neutrons

Question 4

Which statement best explains why carbon can form such a diversity of organic molecules?

Accepted Answer

Carbon can form up to four covalent bonds with other atoms

Question 5

A radioactive isotope has a half-life of 2,000 years. If a sample originally contained 80 grams and now contains 10 grams, how many half-lives have passed?

Accepted Answer

$$80 \rightarrow 40 \rightarrow 20 \rightarrow 10$$; 3 half-lives

Question 6

Which of the following best describes a hydrogen bond?

Accepted Answer

A weak attraction between a hydrogen atom covalently bonded to an electronegative atom and another electronegative atom

Question 7

Which property of water allows a lake to resist temperature changes during the summer?

Accepted Answer

High specific heat

Question 8

How many grams of glucose ($$C_6H_{12}O_6$, molar mass = 180$$\ \mathrm{g/mol}$$) are needed to make 0.5 L of a 1 M solution?

Accepted Answer

$$180\ \mathrm{g/mol} 	imes 1\ \mathrm{mol/L} 	imes 0.5\ \mathrm{L} = 90\ \mathrm{g}$$

Question 9

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

Accepted Answer

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

Question 10

Which of the following is a correct pairing of a functional group and its property?

Accepted Answer

Amino group: acts as a base

Question 11

Which of the following is NOT a type of isomer?

Accepted Answer

Polymer isomer

Question 12

If a protein is denatured, which level(s) of structure are most likely disrupted?

Accepted Answer

Secondary, tertiary, and quaternary

Question 13

Which of the following statements about DNA and RNA is correct?

Accepted Answer

DNA contains deoxyribose, while RNA contains ribose

Question 14

How many water molecules are required to completely hydrolyze a polymer that is 10 monomers long?

Accepted Answer

$$10 - 1 = 9$$ water molecules

Question 15

Which of the following best distinguishes saturated from unsaturated fats?

Accepted Answer

Saturated fats have no double bonds between carbon atoms; unsaturated fats have one or more double bonds

Question 16

Which organelle is responsible for ATP production in eukaryotic cells?

Accepted Answer

Mitochondrion

Question 17

Which of the following is found in plant cells but not in animal cells?

Accepted Answer

Chloroplast

Question 18

Which of the following statements about prokaryotic and eukaryotic cells is correct?

Accepted Answer

Eukaryotic cells have membrane-bound organelles; prokaryotic cells do not

Question 19

Which type of bond is responsible for the secondary structure of proteins?

Accepted Answer

Hydrogen bonds

Question 20

A molecule of table salt ($$NaCl) $$dissolves in water. Which type of bond is broken when $$NaCl$$ dissolves?

Accepted Answer

Ionic bond

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