Biology SOL Practice Test Review (with explanations)

Front

What does the fossil record indicate about the evolution of species?

Back

The fossil record shows that species can evolve slowly over time, as evidenced by similarities between modern species and their ancient counterparts.

Front

What is a substitution mutation in DNA?

Back

A substitution mutation is a change in a DNA sequence where one base is replaced by another, potentially altering the resulting protein.

Front

How does a substitution mutation affect protein synthesis?

Back

A substitution mutation can lead to a different amino acid being incorporated into a polypeptide, which may affect the protein's function.

Front

What is the role of amino acids in proteins?

Back

Amino acids are the building blocks of proteins, and the unique sequence of amino acids determines a protein's structure and function.

Front

What is the dependent variable in an experiment?

Back

The dependent variable is the factor that is measured in an experiment, which is affected by changes in the independent variable.

Front

What occurs during the S phase of the cell cycle?

Back

During the S phase, DNA replication occurs, ensuring that each daughter cell receives an identical set of chromosomes.

Front

What is cellular respiration?

Back

Cellular respiration is the process by which cells convert glucose and oxygen into energy, carbon dioxide, and water.

Front

What is the significance of carbon dioxide measurement in respiration experiments?

Back

Measuring carbon dioxide production helps determine the rate of cellular respiration and the efficiency of energy production during exercise.

Front

What is the difference between aerobic and anaerobic respiration?

Back

Aerobic respiration requires oxygen and produces more energy, while anaerobic respiration occurs without oxygen and produces less energy.

Front

What is the function of enzymes in biological processes?

Back

Enzymes are proteins that act as catalysts, speeding up chemical reactions in the body without being consumed in the process.