Cell Structure and Function

Which of the following is a principle of cell theory?

• Cells come from previously existing cells

• Cells are the smallest living things

• All organisms are composed of one or more cells

• All of the above

Where is the DNA located in prokaryotic cells?

• Nucleus

• Mitochondria

• Nucleoid region

• Endoplasmic reticulum

What is the function of the nuclear lamina in the nucleus?

• Replicates DNA

• Transcribes RNA

• Gives the envelope structure

• Facilitates ribosome synthesis

Which factors affect the rate of diffusion?

• Surface area

• Temperature

• Concentration of diffusing substance

• All of the above

Why do smaller cells have an advantage over larger cells?

• They have multiple nuclei

• They have longer and skinnier shape

• They have a larger surface area to volume ratio

• They have more cytoplasm

What is the resolving power of electron microscopes compared to light microscopes?

• 10 times

• 100 times

• 1000 times

• 10000 times

Which organelle is responsible for protein synthesis?

• Endoplasmic reticulum

• Golgi apparatus

• Lysosome

• Ribosome

What is the function of lysosomes?

• Break down proteins in old organelles

• Store and transport molecules

• Facilitate photosynthesis

• Synthesize lipids

What is the function of mitochondria?

• Facilitate oxidative metabolism

• Store starch in plants

• Break down fatty acids

• Facilitate protein synthesis

What are the components of the eukaryotic cytoskeleton?

• Actin filaments, microtubules, intermediate filaments

• Ribosomes, Golgi apparatus, endoplasmic reticulum

• Nucleus, mitochondria, chloroplasts

• Lysosomes, peroxisomes, vacuoles