BIO 171 Micro Exam 1-Portage Learning

BIO 171 Micro Exam 1 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: .....................