Semester Review

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, causing cells to lose water and shrink.

Front

Which solution is hypertonic to cells?

Back

0.4M solution is hypertonic to the cells.

Front

How are ions moved across the plasma membrane?

Back

Ions are moved across the plasma membrane through facilitated diffusion, which requires specific transport proteins.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a process where substances move across a cell membrane with the help of transport proteins, without the use of energy.

Front

What type of cell has circular DNA not surrounded by a membrane?

Back

Prokaryotic cells have circular DNA that is not enclosed by a membrane.

Front

What is a prokaryotic cell?

Back

A prokaryotic cell is a simple, unicellular organism that lacks a nucleus and membrane-bound organelles.

Front

What is negative feedback in metabolic pathways?

Back

Negative feedback is a regulatory mechanism where the end product of a metabolic pathway inhibits an earlier step, maintaining homeostasis.

Front

How does negative feedback work in metabolic pathways?

Back

The end product of the pathway inhibits an earlier step, reducing the production of that product.

Front

What type of bond is formed between neighboring water molecules?

Back

Hydrogen bonds are formed between neighboring water molecules.

Front

What is a hydrogen bond?

Back

A hydrogen bond is a weak attraction between a hydrogen atom in one molecule and an electronegative atom in another molecule.