Biology EOC Practice Test

Front

What is a producer in an ecosystem?

Back

A producer is an organism that can make its own food through photosynthesis or chemosynthesis, serving as a primary source of energy for other organisms in the food web.

Front

What is the role of chloroplasts in plant cells?

Back

Chloroplasts are organelles in plant cells that conduct photosynthesis, converting light energy into chemical energy stored in glucose.

Front

What is the significance of mRNA in protein synthesis?

Back

mRNA (messenger RNA) carries the genetic information from DNA to the ribosome, where it is translated into a specific amino acid sequence to form proteins.

Front

What is a codon?

Back

A codon is a sequence of three nucleotides in mRNA that corresponds to a specific amino acid or stop signal during protein synthesis.

Front

What is the difference between dominant and recessive alleles?

Back

A dominant allele is expressed in the phenotype even when only one copy is present, while a recessive allele is only expressed when two copies are present.

Front

What is the purpose of a hypothesis in scientific research?

Back

A hypothesis is a testable statement or prediction about the relationship between variables, guiding the direction of an experiment.

Front

What is genetic variation and why is it important?

Back

Genetic variation refers to the differences in DNA among individuals, which is crucial for evolution and adaptation to changing environments.

Front

What is nitrogen fixation?

Back

Nitrogen fixation is the process by which certain bacteria convert atmospheric nitrogen (N2) into ammonia (NH3), making it available for plants.

Front

What are genetically modified organisms (GMOs)?

Back

GMOs are organisms whose genetic material has been altered using genetic engineering techniques to exhibit desired traits.

Front

What is the impact of pesticides on ecosystems?

Back

Pesticides can harm non-target species, disrupt food webs, and lead to the development of resistant pest populations.