10d2B CAG 1 Revision (2)

What is the main difference between embryonic stem cells and adult stem cells?

• Embryonic stem cells can only turn into blood cells.

• Adult stem cells can turn into any cell type.

• Embryonic stem cells can turn into any cell type, while adult stem cells have limited potential.

• Adult stem cells are found only in embryos.

How does increasing the surface area of reactants affect reaction rates?

• It slows down the reaction rate.

• It has no effect on the reaction rate.

• It speeds up the reaction rate.

• It stops the reaction completely.

Why are electromagnets useful in devices like doorbells?

• They are always magnetic.

• Their magnetism can be turned on and off.

• They are cheaper than permanent magnets.

• They do not require electricity to function.

What is the primary function of mitochondria in cells?

• To store genetic information.

• To produce energy through respiration.

• To control cell division.

• To transport nutrients.

What happens at equilibrium in a closed system?

• The concentration of reactants increases.

• The concentration of products decreases.

• The concentration of reactants and products remains constant.

• The reaction stops completely.

Which of the following is true about prokaryotic cells?

• They are larger than eukaryotic cells.

• They have membrane-bound organelles.

• They lack membrane-bound organelles and are typically smaller than eukaryotic cells.

• They have a nucleus.

What happens to the strength of a magnetic field around a wire if the current in the wire increases?

• The magnetic field strength decreases.

• The magnetic field strength remains the same.

• The magnetic field strength increases.

• The magnetic field disappears.

What role does a catalyst play in a chemical reaction?

• It increases the activation energy required for the reaction.

• It lowers the activation energy required for the reaction, allowing it to proceed faster.

• It changes the products of the reaction.

• It stops the reaction.

What is osmosis?

• The movement of solutes across a partially permeable membrane.

• The movement of water across a partially permeable membrane.

• The movement of gases across a membrane.

• The movement of proteins within a cell.

How do cells use active transport?

• To move substances from areas of high concentration to low concentration.

• To move substances from areas of low concentration to high concentration.

• To move water across a membrane.

• To produce energy.