Cell Biology Concepts and Functions

This podcast reviews key biology concepts from unit 2a, covering cell structures, functions, and transport mechanisms. It compares prokaryotic and eukaryotic cells, classifies organisms into domains and kingdoms, and contrasts viruses with cells. The podcast also explains the circulatory, excretory, and nervous systems, including the reflex arc.

Which organelle is responsible for photosynthesis in plant cells?

• Mitochondria

• Chloroplast

• Nucleus

• Ribosome

What is the primary function of the cell membrane?

• Genetic material storage

• Selective permeability

• Protein synthesis

• Energy production

Which type of transport does not require energy?

• Endocytosis

• Exocytosis

• Facilitated diffusion

• Active transport

What is the role of the sodium-potassium pump in cells?

• Facilitates osmosis

• Transports proteins

• Maintains concentration gradients

• Synthesizes lipids

Which of the following is a characteristic of prokaryotic cells?

• Contains mitochondria

• Presence of a nucleus

• Multicellular

• Lack of organelles

Which domain includes organisms with peptidoglycan in their cell walls?

• Bacteria

• Archaea

• Protista

• Eukarya

What is a key difference between viruses and living cells?

• Viruses can reproduce independently

• Viruses lack cellular structure

• Viruses perform photosynthesis

• Viruses have a nucleus

Which organ is primarily responsible for removing urea from the blood?

• Skin

• Liver

• Kidneys

• Lungs

What is the main function of the dendrites in a neuron?

• Store energy

• Produce neurotransmitters

• Transmit impulses

• Receive information

How does the reflex arc help maintain homeostasis?

• By providing voluntary responses

• By enabling rapid responses to stimuli

• By controlling hormone release

• By storing energy