Question 1

Which of the following best describes the difference between eukaryotic and prokaryotic cells?

Accepted Answer

Eukaryotic cells possess membrane-bound organelles, including a nucleus, whereas prokaryotic cells do not.

Question 2

A scientist is testing the effect of a new fertilizer on plant growth. She sets up two groups: one receives the fertilizer, the other does not. What is the independent variable in this experiment?

Accepted Answer

The application of the new fertilizer

Question 3

Which of the following is an example of negative feedback regulation in biological systems?

Accepted Answer

The release of insulin lowers blood glucose levels, which in turn reduces further insulin secretion.

Question 4

Which statement correctly compares qualitative and quantitative data?

Accepted Answer

Quantitative data involves numerical measurements, while qualitative data describes characteristics or qualities.

Question 5

A student proposes that increasing the temperature of water will increase the rate at which sugar dissolves. What is this statement an example of?

Accepted Answer

A hypothesis

Question 6

Which of the following best describes the structure of an atom?

Accepted Answer

A nucleus containing protons and neutrons, surrounded by electrons in orbitals

Question 7

Which formula correctly calculates the atomic mass of an element given the number of protons ($$p) $$and neutrons ($$n$$)?

Accepted Answer

$$\mathrm{Atomic\ mass} = p + n$$

Question 8

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

Accepted Answer

Cohesion and surface tension

Question 9

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

Accepted Answer

Ice has a lower density than liquid water because hydrogen bonds keep water molecules further apart in solid form.

Question 10

Which of the following is a buffer system in the human body that helps maintain pH homeostasis?

Accepted Answer

Carbonic acid-bicarbonate system ($$\mathrm{H_2CO_3} / \mathrm{$$HCO_3$$^-})$$

Question 11

Which type of chemical bond involves the sharing of electron pairs between atoms?

Accepted Answer

Covalent bond

Question 12

How many electrons can fit in a $$p$$ orbital?

Accepted Answer

6

Question 13

Which of the following is true about isotopes?

Accepted Answer

Isotopes have the same number of protons but different numbers of neutrons.

Question 14

Which functional group is commonly found in amino acids and is responsible for their basic properties?

Accepted Answer

Amino group ($$-\mathrm{NH_2$})$$

Question 15

Which of the following best describes the difference between inductive and deductive reasoning in scientific inquiry?

Accepted Answer

Inductive reasoning makes broad generalizations from specific observations; deductive reasoning predicts specific results from general principles.

Question 16

Which of the following is a real-world example of a molecule held together by hydrogen bonds?

Accepted Answer

Water ($$\mathrm{H_2O})$$

Question 17

Which property of water is most important for the transport of nutrients and waste in living organisms?

Accepted Answer

Versatility as a solvent

Question 18

Which of the following best explains why carbon is able to form such a diversity of organic molecules?

Accepted Answer

Carbon has four valence electrons, allowing it to form up to four covalent bonds with other atoms.

Question 19

Which of the following is an example of a controlled experiment?

Accepted Answer

Testing the effect of different fertilizers on plant growth while keeping light, water, and soil constant.

Question 20

Which of the following best describes the role of ATP in cells?

Accepted Answer

ATP provides energy for cellular processes.

General Biology: Foundations, Chemistry, and Water

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