Question 1

Which of the following best describes the relationship between structure and function in biological systems?

Accepted Answer

Structure determines function, and changes in structure can lead to changes in function.

Question 2

Which of the following is an example of an emergent property in biology?

Accepted Answer

The coordinated contraction of heart muscle cells resulting in a heartbeat.

Question 3

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

Accepted Answer

Eukaryotic cells have their genetic material enclosed in a nucleus, while prokaryotic cells do not.

Question 4

Which of the following best explains why water is an excellent solvent for many biological molecules?

Accepted Answer

Water's polarity allows it to form hydrogen bonds with polar and ionic substances.

Question 5

A scientist is testing the effect of a new fertilizer on plant growth. She sets up two groups: one receives the fertilizer, and the other does not. She measures plant height after four weeks. In this experiment, what is the dependent variable?

Accepted Answer

The plant height after four weeks

Question 6

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

Accepted Answer

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Question 7

Which property of water explains why ice floats on liquid water?

Accepted Answer

Water's lower density as a solid compared to its liquid form

Question 8

Which of the following is a correct statement about isotopes?

Accepted Answer

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

Question 9

Which functional group is present in all amino acids and is responsible for their acidic properties?

Accepted Answer

Carboxyl group

Question 10

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

Accepted Answer

The sequence of amino acids in a polypeptide chain

Question 11

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

Accepted Answer

DNA contains deoxyribose sugar, while RNA contains ribose sugar.

Question 12

Which of the following best explains why phospholipids form bilayers in water?

Accepted Answer

Their hydrophobic tails avoid water, while their hydrophilic heads interact with water.

Question 13

Which of the following is a correct pairing of a purine and a pyrimidine found in DNA?

Accepted Answer

Adenine and thymine

Question 14

Which process breaks down polymers into monomers by adding water?

Accepted Answer

Hydrolysis reaction

Question 15

Which of the following best describes the role of experimental controls in scientific research?

Accepted Answer

They allow researchers to isolate the effect of the independent variable.

Question 16

Which of the following is a real-world example of natural selection?

Accepted Answer

A population of insects developing resistance to a pesticide over time.

Question 17

Which of the following best explains why carbon is the backbone of biological macromolecules?

Accepted Answer

Carbon can form up to four covalent bonds, allowing for a variety of stable structures.

Question 18

Which of the following is a correct statement about the difference between starch and cellulose?

Accepted Answer

Both are made of glucose, but starch is used for energy storage and cellulose for structural support.

Question 19

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

Accepted Answer

The overall three-dimensional shape of a single polypeptide chain

Question 20

Which of the following best explains why enzymes are considered biological catalysts?

Accepted Answer

They speed up chemical reactions without being consumed in the process.

General Biology Exam 1 Study Guide: Foundations, Chemistry of Life, and Macromolecules

Study Guide - Practice Questions

Study Guide - Flashcards