2019 STAAR Biology Test

Front

What is the primary product of cellular respiration in mitochondria?

Back

ATP (Adenosine Triphosphate) is the primary product of cellular respiration in mitochondria.

Front

Why do cells with the same genetic material develop into different types of cells?

Back

Cells develop into different types due to internal or external stimuli that trigger the activation of specific genes in the DNA.

Front

What happens to an enzyme if its shape changes?

Back

If the shape of an enzyme changes, it will no longer be able to catalyze the reaction with its substrate.

Front

What is the probability of albinism in the offspring of two mice with AaBb alleles?

Back

The probability of albinism in the offspring is 4/16.

Front

What best describes a biological community?

Back

A community is different species of organisms living and interacting in the same area, such as different species of lizards occupying the same niche in a desert.

Front

Define cellular respiration.

Back

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

Front

What role do enzymes play in biological reactions?

Back

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

Front

What is gene expression?

Back

Gene expression is the process by which information from a gene is used to synthesize a functional gene product, usually a protein.

Front

Explain the concept of alleles.

Back

Alleles are different versions of a gene that determine specific traits, such as fur color in mice.

Front

What is the significance of the 'aa' allele pair in mice?

Back

Mice with the 'aa' allele pair are albino, regardless of the second allele-pair combination.