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

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

Q: Which process is responsible for the breakdown of polymers into monomers, and what is the general equation for this reaction?

Hydrolysis; $$\text{Polymer} + \text{H}_2\text{O} \rightarrow \text{Monomer}$$

Question 1

Which of the following best describes the concept of emergent properties in biological systems?

Accepted Answer

Properties that arise from the interaction of individual components, resulting in new characteristics at higher levels of organization.

Question 2

A scientist is studying the effect of temperature on enzyme activity. She sets up an experiment with different temperature conditions and measures the rate of reaction. Which type of reasoning is she primarily using?

Accepted Answer

Inductive reasoning

Question 3

Which of the following is NOT a correct pairing of a macromolecule and its monomer?

Accepted Answer

Lipid: Polysaccharide

Question 4

Which equation correctly represents the relationship between the number of protons ($$Z$$), neutrons ($$N$$), and mass number ($$A) in an $$atom?

Accepted Answer

$$A = Z + N$$

Question 5

Water has a high specific heat capacity. Which property of water molecules is primarily responsible for this?

Accepted Answer

Hydrogen bonding between water molecules

Question 6

Which of the following statements about the structure of DNA is correct?

Accepted Answer

DNA is composed of two antiparallel strands held together by hydrogen bonds between complementary bases.

Question 7

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

Accepted Answer

Ice is less dense than liquid water due to the hydrogen-bonded lattice structure.

Question 8

Which type of chemical bond is formed by the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Question 9

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}$$ 	ext{ M}$$

Question 10

Which of the following is a function of carbohydrates in living organisms?

Accepted Answer

Energy storage and structural support

Question 11

Which process is responsible for the breakdown of polymers into monomers, and what is the general equation for this reaction?

Accepted Answer

Hydrolysis; $$	ext{Polymer} + 	ext{H}_2	ext{O} ightarrow 	ext{Monomer}$$

Question 12

Which of the following best describes the tertiary structure of a protein?

Accepted Answer

The overall three-dimensional shape of a polypeptide resulting from interactions among R-groups.

Question 13

Which of the following is a correct statement about the difference between RNA and DNA?

Accepted Answer

RNA contains uracil instead of thymine.

Question 14

Which of the following is an example of a deductive approach in scientific inquiry?

Accepted Answer

Using a general principle to predict a specific outcome in an experiment.

Question 15

Which of the following best explains why water is an excellent solvent for ionic compounds?

Accepted Answer

Water is polar, allowing it to surround and separate ions.

Question 16

Which of the following is a correct statement about the role of enzymes in biological reactions?

Accepted Answer

Enzymes lower the activation energy required for a reaction to proceed.

Question 17

Which of the following correctly describes the difference between saturated and unsaturated fatty acids?

Accepted Answer

Saturated fatty acids have no double bonds between carbon atoms; unsaturated fatty acids have one or more double bonds.

Question 18

Which of the following is a correct statement about the function of ATP in cells?

Accepted Answer

ATP provides energy for cellular processes by releasing a phosphate group.

Question 19

A scientist wants to test the hypothesis that a new drug increases the rate of cell division. Which of the following would be the best experimental design?

Accepted Answer

Treat one group of cells with the drug and compare their division rate to a control group without the drug.

Question 20

Which of the following best describes the role of dehydration synthesis in the formation of biological macromolecules?

Accepted Answer

It joins monomers together by removing a molecule of water.

General Biology: Foundations, Chemistry, and Biological Molecules

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