Biology STAAR Review

Front

What does 'semiconservative' mean in the context of DNA replication?

Back

In DNA replication, 'semiconservative' means that each new DNA molecule consists of one old (template) strand and one newly synthesized strand.

Front

What are the stages of mitosis?

Back

The stages of mitosis are prophase, metaphase, anaphase, and telophase.

Front

Define an ecosystem.

Back

An ecosystem is a community of living organisms interacting with their nonliving environment in a specific area.

Front

What is the difference between a dominant and a recessive allele?

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 does the notation 'T' and 't' represent in pea plant genetics?

Back

In pea plants, 'T' represents the dominant tall allele, and 't' represents the recessive short allele.

Front

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move substances across a cell membrane without the use of energy.

Front

What is the role of ATP in cellular processes?

Back

ATP (adenosine triphosphate) is the primary energy carrier in cells, providing energy for various biochemical reactions.

Front

What is the significance of the cell cycle?

Back

The cell cycle is crucial for growth, development, and repair in organisms, ensuring proper cell division and function.

Front

What are the main components of DNA?

Back

The main components of DNA are nucleotides, which consist of a sugar, a phosphate group, and a nitrogenous base.