.1) Which is usually NOT true of archaea? A) They move using flagella. B) They reproduce by mitosis. C) They contain rigid cell walls. D) They are found as single cells. E) They are prokaryotes. 2. Select the TRUE statement(s) regarding eukaryotes. A) Eukaryotes are all multicellular organisms AND have a membrane around the DNA. B) Eukaryotes have a more complex internal structure than archaea or bacteria. C) Eukaryotes have a simpler internal structure than archaea or bacteria AND have a membrane around the DNA. D) Eukaryotes have a membrane around the DNA. E) Eukaryotes have a more complex internal structure than archaea or bacteria AND have a membrane around the DNA. 3. The prokaryotic domain includes A) bacteria. B) archaea. C) eukarya. D) bacteria, archaea, AND fungi. E) bacteria AND archaea. 4. A new organism was found that was unicellular and 1 cm long. The "large" size of this organism alone would A) mean that it could not be a bacterium. B) mean that it must be a protozoan. C) not be useful in identification. D) mean that it had to be in the domain Eukarya. E) suggest that it is a virus. 5. Dehydration reactions are involved in A) the formation of polypeptides AND the formation of monosaccharides. B) the formation of polysaccharides AND the formation of nucleotides. C) the formation of polypeptides AND the formation of polysaccharides. D) the formation of monosaccharides AND the formation of amino acids. E) the formation of polypeptides AND the formation of nucleotides. 6. Which is NOT true of lipids? A) They are a major structural element of all cell membranes. B) They control the movement of molecules into and out of a cell. C) They separate a cell from its environment. D) Examples include steroids and phospholipids. E) They are a homogeneous group of molecules.
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1) Archaea.. (select all the apply) a) have a similar cellular shape as bacteria b) have a nucleus and histones c) their rRNA is more similar to eukaryotes d) are free living modern versions of mitochondria e) are structurally similar to eukaryotes 2) Expression of an operon will always result in... a) increased virulence and pathogenicity b) increased growth rate of the microbe c) expression of mRNA the is transported out of the nucleus for translation d) Synchronized expression of the genes from the operon e) Formation of endosomes 3) Which of the following is not true of transduction? a) Involves the action of bacteriophage b) transfers genes of drug resistance c) the donor cells does not survive the genetic transfer d) involves diet contact between cells e) transfers genes for enzymes an adherence molecules 4) Growth factors__ a) are inorganic b) are synthesized by the organism c) contain elemental oxygen d) cannot be synthesized by the organism e) All of the above
Josee P.
1. Eukaryotes are most closely related to which? A) Archaea B) Bacteria C) Virus D) Impossible to tell 2. All of the following are examples of similarities between archaea and eukaryotes, EXCEPT A) RNA Polymerase composition B) Introns C) Pseudopeptidoglycan D) Histone homologs 3. True or false: Ecologically, Archaea are the most diverse of the three major classes of life? 4. Which of the following phyla contain methanogens? A) Eukaryotes B) Bacteria C) Archaea D) All of the above E) None of the above 5. Which of the following is an example of single cellular fungi? A) Yeast B) Amoeba C) Slime Molds D) Trypanosome 6. Which of the following is NOT a eukaryotic pathogen? A) Plasmodium falciparum B) Clostridium perfringens C) Giardia intestinalis D) Trypanosoma brucei 7. Which of the following is a type of replication found in unicellular eukaryotes? A) Asexual B) Sexual C) Budding D) Cysts E) All of the above F) None of the above 8. Match the following with the best description. Metagenome - The combined genetic material from an environmental sample Microbiome - The combined community of microbes associated with a host Metaproteome - The combined protein content from an environmental sample
Adi S.
1) How are archaea, bacteria, and algae alike? A) They all lack a nuclear membrane. B) Mitochondria are absent. C) Chloroplasts are present. D) They all have a cytoplasmic membrane. E) They all have nucleoids. F) More than one of the above (A-E). 2) Which of the following statements apply to both capsule and pili: 1. are protein-containing structures appearing on the surface of some bacterial cells. 2. may be involved in attachment. 3. may be involved in DNA transfer between cells. 4. may be involved in motility. A) 1, 2, 3, 4. B) 1, 2, 3. C) 1, 2. D) 2, 3. E) 1. 3) Why is the capsule important to the bacterial cell? A) protects against dehydration. B) protects against cell lysis by penicillin. C) protects against phagocytosis. D) two of the above are correct. E) all of the above are correct. 4) Which of these results from a deletion of base pairs that the amino acid sequence is disrupted from that point downward? A) nonsense mutation. B) missense mutation. C) silent mutation. D) frameshift mutation. 5) Which of the following is not found in all viruses? A) capsid. B) envelope. C) nucleic acid. D) two of the above are not found in all viruses. E) all of the above are found in all viruses.
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