Which cell structure contains molecules that direct cell activities?

The plasma membrane is primarily made up of a(n)

Keratin is a protein found in hair. Keratin is made in the

Euglena has a long, whip-like structure extending from the cell membrane that is used for movement. Which of the following do the Euglena use to move?

Yeast is a fungus made up of eukaryotic cells. When sugar is available, yeast will convert it into energy. What part of the yeast cell completes this energy conversion?

Mature human red blood cells lose their nucleus during their development. Which of these are, therefore, ABSENT from red blood cells?

Some cells, such as human nerve and muscle cells, contain more mitochondria than other cells. Why do some cells have more mitochondria than others?

Which organelle is correctly matched with the cell process it performs?

The false feet of the amoeba is used for movement and ingestion of food particles. What is this called?

Which of the following process occurs in chloroplasts?

Some cells have many short, hair-like structures extending from the cell membrane. These structures are used mainly for ___ and are called ___.

The natural cycling of oxygen between organisms and their environment is most directly accomplished through which of the following pairs of processes?

Students separated 16 Elodea plants into four equal groups. Each group was exposed to a different number of hours of light. The amount of gas released was measured. Which structure would produce the gas?

Which part is responsible for energy?

Oxygen is produced by the ___ and carbon dioxide is produced by the ___.

Specialized proteins control cell division in the amoeba. Which cell part is responsible for making these proteins?

A healthy circulatory system is able to deliver excess oxygen and nutrients to cells. Which cell organelle requires oxygen to carry out cellular respiration?

Which organelle in mangrove cells converts solar energy into useable energy?

The exchange of oxygen and carbon dioxide between the body and the air occurs in the lungs. This exchange of gases takes place at the cellular level. What part of the cell is primarily responsible for this exchange?

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