Florida Biology EOC Practice Test

Front

What is a recessive allele?

Back

A recessive allele is a variant of a gene that must be present in two copies (homozygous) for the trait to be expressed. In the case of X-linked disorders, males (XY) are more likely to express the disorder with only one copy.

Front

How do mutations affect the cell cycle?

Back

Mutations can alter the regulation of the cell cycle, leading to uncontrolled cell division, which is a characteristic of cancer.

Front

What role do bacteria play in the human small intestine?

Back

Many bacteria in the small intestine are beneficial as they help digest food and synthesize certain vitamins.

Front

What is osmosis?

Back

Osmosis is the movement of water across a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration.

Front

What distinguishes protists from bacteria?

Back

Protists are eukaryotic organisms that have a nucleus and membrane-bound organelles, while bacteria are prokaryotic and lack these structures.

Front

What is the significance of the X chromosome in genetic disorders?

Back

The X chromosome can carry recessive alleles that lead to genetic disorders, affecting males more frequently due to their single X chromosome.

Front

What is the function of the cell cycle?

Back

The cell cycle is a series of phases that a cell goes through to grow and divide, ensuring proper replication and distribution of genetic material.

Front

What is the impact of nondisjunction during meiosis?

Back

Nondisjunction can lead to gametes with an abnormal number of chromosomes, resulting in genetic disorders such as Down syndrome.

Front

How do enzymes function in digestion?

Back

Enzymes are biological catalysts that speed up chemical reactions, including the breakdown of food into absorbable nutrients.

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite external changes.