BIOS 242 Week 1 Quiz (100% Correct Answers)

(TCO 1) Organisms whose cells are eukaryotic include which of the following? Molds Yeasts Fungi All of the above None of the above Chapter 1, The Early Years of Microbiology section (TCO 1) Th e scientific method consists of four basic steps. Which option below shows the correct sequence of events? Observe results, generate hypothesis, ask question based upon observations, conduct experiment Conduct experiment, ask question based upon observations, generate hypothesis, observe results Generate hypothesis, conduct experiment, observe results, ask question based upon observations Ask question based upon observations, generate hypothesis, conduct experiment, observe results None of the above Chapter 1, The Golden Age of Microbiology section (TCO 1) Which of the following is not a characteristic of algae? Correct Answer They reproduce asexually by budding. They may be single celled or multicellular. They are photosynthetic. They are eukaryotic organisms. They provide much of the world’s oxygen. Chapter 1, The Early Years of Microbiology section (TCO 1) Which of the following scientists provided evidence in favor of the concept of spontaneous generation? Needham Redi Spallanzani Buchner Pasteur Chapter 1, The Golden Age of Microbiology section (TCO 2) Archaea are similar to bacteria in that . they do not have peptidoglycan in their cell walls their cell membranes contain branched hydrocarbon chains they are not known to cause disease they are a variety of shapes including cocci, bacilli, spirals, or pleiomorphic they are similar to bacteria in all the ways listed above Chapter 11, Survey of Archaea section Question 6 2 / 2 pts (TCO 2) Photosynthetic bacteria . produce glucose and oxygen may also be nitrogen fixers have chloroplasts cannot tolerate oxygen in their environment all have heterocysts Chapter 11, Survey of Bacteria section (TCO 2) Which of the following is not a component of bacterial cell walls? Peptidoglycan Lipoteichoic acids Mycolic acid Tetrapeptide Tubulin Chapter 3, Cell Structure and Function (TCO 2) Bacterial cell walls that are resistant to drying contain . carbohydrates amino acids lipopolysaccharide tubulin waxes Chapter 3, Cell Structure and Function (TCO 2) Which of the following is not associated with the nucleus of a eukaryotic cell? Chromatin Cristae Histones Nucleoplasm Nucleolus Chapter 3, Cell Structure and Function (TCO 2) Which of the following bacterial cell structures plays an important role in the creation of biofilms? Glycocalyces Flagella Fimbriae Pili Both fimbriae and glycocalyces Chapter 3, Cell Structure and Function (TCO 2) 4) Both mitochondria and chloroplasts have inner membranes with much greater surface area than their outer membranes. Discuss the contribution of the extensive inner membranes to the roles of these organelles. (10 points) Your Answer: Both the mitochondria and chloroplasts are to be considered as primitive organelles, they are able to sustain life, energy production, synthesis and transport of material and maintaining their structure. The mitochondrial membrane consists of small structures called Cristae. Cristae is the primary site for ATP synthesis and the maintenance of the proton gradient in the mitochondria. Due to the fact that cells do require a lot of energy, that is why there are multiple mitochondria's in a cell. As for the chloroplast inner membrane this is the primary site for photosynthesis. The inner membrane has the ability to signal fatty acids and lipids. One of the major functions of this inner membrane is the role in signaling transduction. Chapter 3 Both organelles use metabolic processes embedded in lipid membranes to produce cellular energy. The cristae of mitochondria produce ATP. The thylakoids of chloroplasts are the sites of light energy capture and conversion to cellular energy. The extensive surface area of the folded inner membranes allows both organelles to produce much more energy than would otherwise be possible. Quiz Score: 26 out of 30 Show Less