Cell Biology Comprehensive Review

Which of the following is NOT a principle of the cell theory?

• Cells are the basic unit of life.

• Very few cells reproduce.

• All living things are made of cells.

Prokaryotes lack

• genetic material.

• cytoplasm.

• a nucleus.

Eukaryotes usually contain

• a nucleus with genetic material.

• specialized organelles.

• Both are correct.

Which of the following organisms are prokaryotes?

• plants

• animals

• bacteria

Which of the following is a function of the nucleus?

• stores DNA

• creates ATP

• breaks down unusable organelles

Which structure makes proteins using coded instructions that come from the nucleus?

• vacuole

• ribosome

• mitochondria

All cells contain cell membranes. Which of the following describes the composition of cell membranes?

• Cell membranes are composed of carbohydrate chains, which allow all materials to enter and leave the cell.

• Cell membranes are composed of cytoplasm, which allows proteins to be excreted by the cell.

• Cell membranes are composed of lipid molecules, which provide a flexible structure.

Which organelle converts the chemical energy stored in food into compounds that are more convenient for the cell to use?

• chloroplast

• mitochondrion

• endoplasmic reticulum

Which organelle would you expect to find in plant cells but not animal cells?

• mitochondrion

• smooth endoplasmic reticulum

• chloroplast

Which of the following is a function of the cell membrane?

• helps a cell keep its shape

• helps make protein

• controls what enters and leaves the cell