Front

What is the independent variable in an experiment studying the effect of temperature on bacterial growth?

Back

Temperature

Front

Which of the following is an organic compound? H2O, C6H12O6, NH2, OH

Back

C6H12O6

Front

Why does water expand as it freezes, making ice less dense than liquid water?

Back

Water is polar and the positive and negative ends of the molecule attract each other.

Front

What type of movement across cell membranes is inhibited if ATP breakdown (hydrolysis) is inhibited?

Back

Passage of a solute against its concentration gradient.

Front

What type of molecules are lipid heads?

Back

Polar

Front

Define 'independent variable' in the context of an experiment.

Back

The independent variable is the factor that is manipulated or changed in an experiment to observe its effect.

Front

What is the significance of water being a polar molecule?

Back

Its polarity allows it to dissolve many substances, making it a universal solvent.

Front

Explain the term 'facilitated diffusion'.

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What is ATP and why is it important for cellular processes?

Back

ATP (adenosine triphosphate) is the primary energy carrier in cells, providing energy for various biochemical reactions.

Front

What is the role of aquaporins in cell membranes?

Back

Aquaporins are channel proteins that facilitate the transport of water across cell membranes.