BIOD 171 MICROBIOLOGY EXAM 1 (WITH 100% CORRECT ANSWERS)EXAM SOLUTIONS|PORTAGE LEARNING

Question 1 3 / 3 pts True/False. A virus is classified as a microbe. True Although viruses are not living and as such are not considered microorganisms, they can, however, be classified as microbes, a more general term that includes microorganisms and viruses. Question 2 3 / 3 pts True or False: The smallest biological unit of life is the molecule. False The smallest biological unit of life is the cell. Question 3 4 / 4 pts What are the four main types of macromolecules found in cells? Proteins, Lipids, Nucleic acids and Polysaccharides Question 4 3 / 3 pts Proteins are formed from various combinations of [answer1] of which there are [answer2] known forms. 1. Amino acids 2. 20 Question 5 4 / 4 pts How many amino acids are classified as being essential amino acids? 9 Question 6 10 / 10 pts What are the two major types of nucleic acids and their roles? There are two major types of nucleic acids: DNA (deoxyribonucleic acid) and RNA (ribonucleic acid). Nucleic acids are chemical molecules that carry genetic information within the cell. DNA contains a vast amount of hereditary information and is responsible for the inheritable characteristics of living organisms. RNA is responsible for deciphering the hereditary information in DNA and using it to synthesize proteins. Question 7 10 / 10 pts Complete the following RNA strand, and indicate how many bonds are formed for each complementary pair: This study source was downloaded by from CourseH on :44:16 GMT -05:00 3’ GGUCAUCG 5’ 5’ CC AGC 3’ 3’ GGUCAUCG 5’ 5’ CCAGUAGC 3’ There are 2 bonds formed between A and U, and 3 bonds between G and C. Question 8 5 / 5 pts The plasma membrane (select all that are true): Restricts movement of materials in and out of the cell Prevents essential nutrients from escaping Question 9 5 / 5 pts How many carbon atoms are present in the monosaccharide glucose? 6 The molecular formula of Glucose is C6H12O6 Question 10 3 / 3 pts True of False: Eukaryotic cells do not have a nucleus. False Eukaryotic cells do have a nucleus (prokaryotic cells do not). Question 11 4 / 4 pts Describe the 4 basic bacterial morphologies. Coccus (round/spherical), bacillus (rod), vibrio (curved rod) or spirillum (spiral/corkscrew). Question 12 3 / 3 pts True or False: Archaea, a eukaryotic class of microorganisms, is capable of surviving harsh environments. False Archaea are prokaryotic bacteria capable of surviving harsh environments. Question 13 5 / 5 pts Animalia, Plantae, Fungi and Protista are all classification under what type of organism? This study source was downloaded by from CourseH on :44:16 GMT -05:00 Eukarya Only Eukarya contains animals, plants, fungi and protists. Question 14 3 / 3 pts Microorganisms classified as Plantae obtain most of their energy by converting [answer1] energy into [answer2] energy. 1. Light (sunlight) 2. chemical (sugars) Question 15 5 / 5 pts Which of the following are considered Protista? Select all that apply. Algae Amoeba Question 16 5 / 5 pts True or False: Protista retain a unicellular classification, as they are unable to form tissue layers. True Question 17 3 / 3 pts The function of the ribosome is (select all that apply): Protein synthesis Ribosomes are located in the cytoplasm of prokaryotic cells and in the ER of eukaryotic cells. Question 18 5 / 5 pts Identify the following cellular components by matching the number with the description. This study source was downloaded by from CourseH on :44:16 GMT -05:00 A. Cell wall B. Lysosome C. Centriole D. Rough endoplasmic reticulum E. Plasma membrane F. Nucleus G. Golgi apparatus 1 - F 2 - B 3 - E 4 - G This study source was downloaded by from CourseH on :44:16 GMT -05:00 5 - D Question 19 5 / 5 pts Cell walls are found in which of the following (select all that apply): Plants Fungi Bacteria Algae Question 20 10 / 10 pts The function of the mitochondria is (select all that apply): To produce energy (ATP) Mitochondria are considered the power plant of the cell, as it produces ATP. Question 21 2 / 2 pts True or False. All multicellular microorganisms classified as Animalia are autotropic. False They are heterotropic.