is demonstrated by the differences in Gram staining? A. i6. What is the major di
ID: 202695 • Letter: I
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is demonstrated by the differences in Gram staining? A. i6. What is the major difference between Gram-positive and Gram-negative bacteri Alt Gram-negative bacteria have a cell wall made out of proteins while Gram-positive bacteria have a cell wall made out of peptidoglycan bacteria have a cell wall that is negatively charged periplasmic cell wall surrounded by an outer membrane B. Gram-positive bacteria have a cell wall that is positively charged while Gram-negative C. Gram-negative D Gram-posi bacteria have no cell wall, they have two layers of membranes with a space between, while Gram-positive bacteria have a thick cell wall tive bacteria have a thick cell wall while Gram-negative bacteria have a thin 17. The advantage of using yeast cell Is over bacterial cells to express human proteins is that? A. Yeast cells grow faster D. Yeast cells are easily lysed to purify the proteins 18. You are classifying a novel virus and have Yeast cells are easier to manipulate genetically Yeast cells are eukaryotic and modify proteins similarly to the first glance at its sequenced genome. After using a database to identify similar proteins, you discover that it coding genes including reverse transcriptase. What kind of virus is it? has several protein- A. A dsDNA virus like adenovirus A ssDNA virus like parvovirus A retrovirus like HIV A segmented DNA virus polydnavirus 19. Animals with true differentiated tissues are known as? A. Parazoa Metazoa Eumetazoa D. Homozoa 20. Why do some biologists call Protista the "junk drawer" of taxonomy? A. Protist species are not ecologically important tists represent ancient, primitive species that never evolved C. Protists are not a monophyletic taxon D. Protists are species with high rates of DNA mutation, and thus are diffcult to place in molecular phylogenyExplanation / Answer
16 answer is D. Gram positive bacteria have thick cellwall and gram negative have thin cell wall.
17 answer is C. Yeast cell is eukaryotic and modify protein similarly to human cell.
18 answer is C. Retrovirus like HIV
19 Answer is C. Eumetazoa
20 Answer is C. protists are not monophyletic taxon.
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