BIOD 171 Exam 1 Portage Learning Exam Questions and Answers

BIOD 171 Exam 1 Portage Learning Exam Questions and Answers True or False: A virus is classified as a microbe -Answer-True. Viruses are not living and are not considered microorganisms, but can be classified as microbes. True or False: The smallest biological unit of life is a molecule. -Answer-False The smallest unit of life is a cell. What are the four main types of macromolecules found in a cell? -Answer-Proteins, Lipids, Nucleic Acids and Carbohydrates How many different types of amino acids are available to make proteins? -Answer-20 How many amino acids are classified as being essential amino acids? -Answer-9 Where can the two major types of nucleic acids be found in the cell and what are their roles? -Answer-DNA and RNA They are both found in the nucleus. DNA contains and stores hereditary information and is responsible for the characteristics of living organisms. RNA is a messenger and responsible for translating the hereditary information in DNA and synthesizes proteins. Complete the following RNA strand and indicate how many bonds are formed for each complementary pair. -Answer-5'CCAGUAGC3' AGU is the missing part. There are two bonds between A and U and 3 bonds between G and C. The plasma membrane (select all that are true): -Answer-Is often a bilayer comprised of lipids Contrains hydrophobic tails pointing inward Carbon, hydrogen, and oxygen atoms come together to form what primary macromolecules? Give an example. -Answer-Carbohydrates. They come together to form glucose or lactose. True or False: The genetic material within a prokaryotic cell is contained within a membrane-enclosed region. -Answer-False