Exploring Organelles and Cell Size in AP Biology

This AP Biology lesson reviews Unit 2, focusing on cellular organelles, cell structure, and cell size. The video provides details on the 2020 AP Biology exam format, including the types of questions and time limits. It also reviews previous homework on macromolecules and enzymes, discusses the functions of various organelles, and explains the importance of cell size and surface area for efficiency. Practice questions are included to reinforce learning, and common errors are highlighted to help students avoid mistakes. The lesson concludes with a homework assignment and a preview of upcoming topics.

What is the total percentage of the AP Biology exam score that the long free response question (FRQ) will compose?

• 75%

• 50%

• 65%

• 35%

Which of the following is NOT a task you will be asked to do in the long FRQ?

• Draw a biological model

• Identify experimental design procedures

• Describe and explain biological concepts

• Analyze data

Tags

NGSS.HS-LS1-2

NGSS.HS-LS1-3

NGSS.HS-LS1-6

NGSS.HS-LS2-6

What is the optimal pH range for the enzyme bromelain found in pineapples?

• 8.5 to 10.0

• 7.0 to 8.5

• 5.5 to 7.0

• 3.5 to 5.2

Which type of reaction is used to break down proteins into smaller molecules?

• Reduction

• Oxidation

• Hydrolysis

• Dehydration synthesis

Which organelle is known as the 'powerhouse of the cell'?

• Golgi complex

• Mitochondria

• Endoplasmic reticulum

• Ribosome

Tags

NGSS.HS-LS1-7

What is the primary function of the rough endoplasmic reticulum (ER)?

• Protein synthesis

• Storage of genetic material

• Detoxification

• Lipid synthesis

Which organelle is responsible for photosynthesis in plant cells?

• Mitochondria

• Chloroplast

• Lysosome

• Vacuole

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

Why do smaller cells have a higher surface area to volume ratio?

• They have more organelles

• They can divide faster

• They are more efficient at exchanging materials

• They have thicker cell walls

What is the function of microvilli in the small intestine?

• Store waste products

• Transport oxygen

• Secrete digestive enzymes

• Increase surface area for nutrient absorption

Which of the following is a common error students make when identifying cell functions?

• Ignoring the role of the cell membrane

• Confusing cilia with villi

• Misidentifying the nucleus

• Overestimating the size of mitochondria