2nd 9 week Review TEST N.Brown 2022-23

Unlike eukaryotic cells, prokaryotic cells do NOT have:

• DNA

• cytoplasm

• cell walls

• a membrane bound nucleus and organelles

What organelle is called the "powerhouse" of a cell?

• Endoplasmic Reticulum
• Nucleus
• Mitochondria
• Nucleolus

Which of the following statements is NOT part of the cell theory?

• Cells are the basic unit of structure and function in all living things.

• All cells are produced from other cells.

• Only animal cells are composed of cells.

• All living things are composed of cells.

The function of the plasma membrane is....

• to regulate (control) what enters and leaves the cell.

• fight bacteria and viruses that enter the cell.

• provide rigid support and protection to the cell.

• make sure each cell can move

Where is DNA located in an eukaryotic cell?

• ribosome

• cytoplasm

• nucleus

• lysosome

Describe COHESION.

• Water molecules attracted to other substances.

• Water molecules climbing upwards against the force of gravity.

• Water molecules dissolving many substances because of its polarity.

• Water molecules attracted to other water molecules.

Waxes, oils, fats and steroids are examples of:

• Carbohydrates

• Lipids

• Proteins

• Nucleic Acids

What is the role of cholesterol in the cell membrane?

• It makes the membrane flexible (able to move)

• It stabilizes or gives the membrane strength.

• It makes the membrane glow

• none of these

In this example diffusion, food coloring is the _______ and water is the ___________

• solute; solvent

• solvent; solute

• enzyme; active site

• none of these

Why does water move from the roots to the leaves of plants through the plants' tiny tubes?

• specific heat 
• capillary action

• atoms

• density