Cell Biology and Ecology Concepts

The video reviews first semester biology topics, covering ecology, energy flow, succession, biogeochemical cycles, nitrogen and phosphorus cycles, cell structure, photosynthesis, and respiration. It emphasizes the importance of understanding these concepts before moving on to new material.

What is the primary focus of the first semester review?

• Introduction to new topics

• Review of previous semester topics

• Discussion on future projects

• Preparation for a test

In ecology, what percentage of energy is typically transferred from one trophic level to the next?

• 10%

• 5%

• 50%

• 20%

What term describes the maximum population size that an environment can sustain?

• Ecological footprint

• Population density

• Carrying capacity

• Biotic potential

Which process is responsible for converting nitrogen gas into a form usable by plants?

• Respiration

• Nitrogen fixation

• Decomposition

• Photosynthesis

What is the starting point for the phosphorus cycle?

• Soil

• Atmosphere

• Water

• Rocks

Which macromolecule is primarily responsible for long-term energy storage?

• Nucleic acids

• Lipids

• Carbohydrates

• Proteins

What is the primary function of ribosomes in a cell?

• Lipid storage

• Protein synthesis

• Energy production

• DNA replication

Which process allows water to move across a cell membrane?

• Endocytosis

• Diffusion

• Osmosis

• Active transport

What is the main purpose of photosynthesis?

• To absorb carbon dioxide

• To produce oxygen

• To convert light energy into chemical energy

• To break down glucose

Which stage of cellular respiration produces the most ATP?

• Electron transport chain

• Krebs cycle

• Fermentation

• Glycolysis