BIO REVIEW #2 - CH 04

Which organelle(s) most likely originated by invagination of the plasma membrane? a. mitochondria b. flagella c. nucleus d. chloroplasts e. Both a and d.

a or d is correct.

Mitochondria a. are involved in cellular respiration. b. break down ATP to release energy for cells. c. contain grana and cristae. d. are present in animal cells but not plant cells. e. All of these are correct.

a. are involved in cellular respiration.

Which structures are found in a prokaryotic cell? a. cell wall, ribosomes, thylakoids, chromosome. b. cell wall, plasma membrane, nucleus, flagellum. c. nucleoid, ribosomes, chloroplasts, capsule. d. chloroplasts e. All of these are correct.

a. cell wall, ribosomes, thylakoids, chromosome.

Which one of these is not found in the nucleus? a. functioning ribosomes. b. chromatin that condenses to chromosomes. c. nucleolus that produces rRNA. d. nucleoplasm instead of cytoplasm. e. All forms of RNA.

a. functioning ribosomes.

Which of these is not true? a. Actin filaments are found in muscle cells. b. Microtubules radiate out from the ER. c. Intermediate filaments sometimes contain keratin. d. Motor molecules use microtubules as tracks.

b. Microtubules radiate out from the ER.

Cilia and Flagella a. have a 9 + 0 pattern of microtubules, same as basal bodies. b. contain myosin that pulls on actin filaments. c. are organized by basal bodies derived from centrioles. d. are constructed similarly in prokaryotes and eukaryotes. e. Both a and c are correct.

b. contain myosin that pulls on actin filaments.

The small size of cells best correlates with a. the fact that they are self-reproducing. b. their prokaryotic versus eukaryotic nature. c. an adequate surface area for exchange of materials. d. the fact that they come in multiple sizes. e. All of these are correct.

c. an adequate surface area for exchange of materials.

Which organelle releases oxygen? a. ribosome b. Golgi apparatus c. chloroplast d. smooth ER.

c. chloroplast

Lysosomes function in: a. protein synthesis. b. processing and packaging. c. intracellular digestion. d. lipid synthesis e. production of hydrogen peroxide.

c. intracellular digestion.

Vesicles from the ER most likely are on their way to: a. the rough ER. b. the lysosomes. c. the Golgi apparatus. d. the plant cell vacuole only. e. the location suitable to their size.

c. the Golgi apparatus.

Which of these best distinguishes a prokaryotic cell from a eukaryotic cell? a. Prokaryotic cells have a cell wall, but eukaryotic cells never do. b. Prokaryotic cells are much larger than eukaryotic cells. c. Prokaryotic cells have flagella, but eukaryotic cells do not. d. Prokaryotic cells do not have a membrane-bounded nucleus, but eukaryotic cells do have such a nucleus. e. Prokaryotic cells have ribosomes, but eukaryotic cells do not have ribosomes.

d. Prokaryotic cells do not have a membrane-bounded nucleus, but eukaryotic cells do have such a nucleus.

Which of the following organelles contains its (their) own DNA, suggesting they were once independent prokaryotes? a. Golgi apparatus b. mitochondria c. chloroplasts d. ribosomes e. Both b and c are correct.

e. Both b and c are correct.