07 Biology IA Unit Two Review Flashcard - BIO IA

Front

What is the primary method by which O2 enters a cell?

Back

O2 enters a cell through diffusion, a passive transport method.

Front

What type of cell is characterized by having a nucleus?

Back

Eukaryotic cells are characterized by having a nucleus.

Front

List the primary elements found in the molecules of life.

Back

The primary elements are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur.

Front

What molecules enter a cell through facilitated diffusion?

Back

Glucose and water enter a cell through facilitated diffusion.

Front

What are the three components of a DNA molecule?

Back

A DNA molecule consists of a phosphate group, a sugar, and a nitrogenous base.

Front

Define diffusion in the context of cellular transport.

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is the role of proteins in cellular transport?

Back

Proteins can act as channels or carriers to facilitate the transport of molecules across the cell membrane.

Front

What distinguishes prokaryotic cells from eukaryotic cells?

Back

Prokaryotic cells lack a nucleus and membrane-bound organelles, while eukaryotic cells have both.

Front

What is the function of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, maintaining homeostasis.

Front

Explain the significance of nitrogen in biological molecules.

Back

Nitrogen is a key component of amino acids and nucleotides, essential for proteins and DNA.