Biology Review 1

Front

What happens to a freshwater cell when placed in a salt water solution?

Back

The cell shrinks due to osmosis, as water moves out of the cell to balance the higher concentration of salt outside.

Front

What molecule is required for active transport to move materials against the concentration gradient?

Back

ATP (Adenosine Triphosphate) is required for active transport.

Front

True or False: Active transport does not require energy.

Back

False. Active transport requires energy to move substances against their concentration gradient.

Front

What is the main component of biological membranes?

Back

Lipids are the main component of biological membranes, forming a bilayer.

Front

Where does photosynthesis occur in the cell?

Back

Photosynthesis occurs in the chloroplasts.

Front

Define osmosis.

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is the role of ATP in cellular processes?

Back

ATP provides energy for various cellular processes, including active transport and metabolic reactions.

Front

What are lipids?

Back

Lipids are organic molecules that are hydrophobic and include fats, oils, and phospholipids, which are essential for cell membrane structure.

Front

What is the function of chloroplasts?

Back

Chloroplasts are organelles in plant cells that conduct photosynthesis, converting light energy into chemical energy.

Front

Explain the difference between passive and active transport.

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their gradient.