Biology SOL Practice Test Review (with explanations)

Front

What is the classification system for protists based on?

Back

Protists are classified by the way in which they obtain nutrients, as they share characteristics with members of other kingdoms.

Front

How do enzymes affect chemical reactions in cells?

Back

Enzymes speed up chemical reactions by decreasing the activation energy needed for the reaction.

Front

What is the position of producers in energy, biomass, and numbers pyramids?

Back

Producers are at the bottom level of all three pyramids.

Front

What is the term for inserting a gene into an organism?

Back

Genetic engineering.

Front

What is the advantage of having multiple codons for the same amino acid?

Back

The effect of mutations in the DNA could be reduced.

Front

What are protists?

Back

Protists are a diverse group of eukaryotic microorganisms, which can be unicellular or multicellular.

Front

What role do enzymes play in biological reactions?

Back

Enzymes act as catalysts to speed up reactions without being consumed in the process.

Front

What is an energy pyramid?

Back

An energy pyramid is a graphical representation of the energy flow in an ecosystem, showing the energy available at each trophic level.

Front

Define genetic engineering.

Back

Genetic engineering is the manipulation of an organism's DNA to alter its characteristics.

Front

What is a codon?

Back

A codon is a sequence of three nucleotides in mRNA that codes for a specific amino acid.