USA 6 Final

Front

What is an isotonic solution?

Back

An isotonic solution has the same concentration of solutes as another solution, resulting in no net movement of water across a semipermeable membrane.

Front

Why is pure water not given to patients with severe dehydration?

Back

Pure water is hypotonic and would cause blood cells to swell and burst.

Front

What happens to enzyme activity when temperature increases?

Back

Enzyme function increases with temperature up to a certain point, after which it decreases due to denaturation.

Front

What is the role of chloroplasts in plant cells?

Back

Chloroplasts capture light energy and convert it into chemical energy through photosynthesis.

Front

What biomolecule is most similar to the waxy coating on plants?

Back

Phospholipids are similar to the waxy coating as they also create barriers that are not water-permeable.

Front

What is the primary function of lipids in the cell membrane?

Back

Lipids separate the contents inside the cell from the outside environment.

Front

Define homeostasis in biological systems.

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite external changes.

Front

What is the effect of temperature on enzyme activity?

Back

Enzymes have an optimal temperature range; outside this range, their activity decreases.

Front

What is the function of carbohydrates in the cell membrane?

Back

Carbohydrates play a role in cell recognition and signaling.

Front

What is the difference between hypotonic and hypertonic solutions?

Back

Hypotonic solutions have a lower concentration of solutes compared to another solution, causing cells to swell, while hypertonic solutions have a higher concentration, causing cells to shrink.