GP2 Test for HL1 2024

Front

What is the nuclear envelope?

Back

The nuclear envelope is a double membrane that surrounds the nucleus in eukaryotic cells, separating the contents of the nucleus from the cytoplasm.

Front

Define cohesion in the context of water molecules.

Back

Cohesion is the property of water molecules that allows them to stick to each other due to hydrogen bonding, resulting in surface tension.

Front

What is endocytosis?

Back

Endocytosis is a type of active transport where cells engulf substances from the outside environment, bringing them into the cell.

Front

Which eukaryotic organelle does not contain DNA?

Back

The endoplasmic reticulum does not contain DNA; it is involved in protein and lipid synthesis.

Front

What role does water play in breaking down polymers?

Back

Water is used in hydrolysis reactions to break down polymers into monomers by adding a water molecule to split the bonds.

Front

What is the function of the nucleolus?

Back

The nucleolus is responsible for producing ribosomes and is located within the nucleus.

Front

Explain the difference between adhesion and cohesion.

Back

Adhesion is the attraction between different substances, while cohesion is the attraction between similar substances, such as water molecules.

Front

What is osmosis?

Back

Osmosis is the passive transport of water molecules across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

Define passive transport.

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is the role of mitochondria in a cell?

Back

Mitochondria are known as the powerhouse of the cell, generating ATP through cellular respiration.