3/13 warm-up

Which of the following is an example of positive feedback in the human body?

• Regulation of blood sugar levels

• Blood clotting process

• Temperature regulation

• Water balance

How does passive transport differ from active transport across the cell membrane?

• Passive transport requires energy, while active transport does not.

• Passive transport moves substances against the concentration gradient.

• Passive transport does not require energy, while active transport does.

• Passive transport involves vesicles, while active transport does not.

Which organelle is responsible for producing energy in the form of ATP in eukaryotic cells?

• Nucleus

• Ribosome

• Mitochondria

• Golgi apparatus

What is the primary function of the cell membrane?

• To store genetic information

• To control the movement of substances in and out of the cell

• To produce proteins

• To provide structural support

Which of the following is a characteristic of prokaryotic cells?

• They have a nucleus.

• They contain membrane-bound organelles.

• They have a simple cell structure without a nucleus.

• They are typically larger than eukaryotic cells.

What role does the endoplasmic reticulum play in a cell?

• It is involved in protein and lipid synthesis.

• It stores and protects DNA.

• It breaks down waste materials.

• It generates cellular energy.

Which type of transport involves the movement of water molecules across a semipermeable membrane?

• Active transport

• Osmosis

• Endocytosis

• Exocytosis

What is the main difference between eukaryotic and prokaryotic cells?

• Eukaryotic cells have a cell wall, while prokaryotic cells do not.

• Eukaryotic cells have a nucleus, while prokaryotic cells do not.

• Eukaryotic cells are always unicellular, while prokaryotic cells are multicellular.

• Eukaryotic cells lack ribosomes, while prokaryotic cells have them.

Which organelle is responsible for packaging and distributing proteins in the cell?

• Lysosome

• Golgi apparatus

• Chloroplast

• Vacuole

What is the function of ribosomes in a cell?

• To produce energy

• To synthesize proteins

• To digest cellular waste

• To store nutrients