11 Biology Unit 1, Topic 1 pretest

Which of the following best distinguishes prokaryotic cells from eukaryotic cells?

• Presence of a nucleus

• Ability to photosynthesize

• Absence of ribosomes

• Larger cell size

Which organelle is responsible for energy production in eukaryotic cells?

• Nucleus

• Mitochondria

• Ribosomes

• Golgi apparatus

What is the function of the rough endoplasmic reticulum?

• Protein synthesis

• Lipid synthesis

• Energy production

• Transport of waste

Which organelle is responsible for packaging and modifying proteins?

• Lysosomes

• Golgi apparatus

• Vacuoles

• Ribosomes

Stem cells are created during which process?

• Meiosis

• Mitosis

• Osmosis

• Active transport

Which type of stem cell can differentiate into any cell type in the body?

• Unipotent

• Multipotent

• Pluripotent

• Totipotent

What is an example of a system that exchanges gases in multicellular organisms?

• Digestive system

• Respiratory system

• Nervous system

• Excretory system

The main function of chloroplasts is to:

• Store water

• Photosynthesize

• Produce proteins

• Transport substances

Which of the following describes the fluid mosaic model of the cell membrane?

• A rigid layer of phospholipids

• A dynamic structure with proteins embedded in a phospholipid bilayer

• A solid layer of cholesterol and glycoproteins

• A static, impermeable barrier

What is the role of protein channels in the cell membrane?

• Store genetic information

• Allow selective transport of molecules

• Generate energy

• Anchor the membrane to the cytoskeleton