Biology 2000 Practice Test Questions with Correct Answers

Which type of light microscope only illuminates the specimen? a.Light field b.Dark field c.Phase contrast d.Confocal e.Transmission b. Dark field What is the main difference between prokaryotes and eukaryotes- a. Cytoplasm b. DNA c. Ribosomes d. Plasma membrane e. Compartmentalization e. Compartmentalization Which of the following organelle is not part of the endomembrane system? a. Smooth endoplasmic reticulum b. Rough endoplasmic reticulum c. Golgi apparatus d. Nucleolus e. All are part of the endomembrane system d. Nucleolus Animal cell walls are composed of - a. Cellulose b. Chitin c. Peptidoglycan d. Glucomannin e. None of the above e. None of the above Which of the following does not have an endosymbiotic origin? a. Ribosome b. Mitochondria c. Chloroplast d. All of the above have endosymbiotic origins a. Ribosome Sending proteins into mitochondria or chloroplasts is — a. Cotranslational b. Pretranslational c. Posttranslational d. Quasitranslational c. Posttranslational