BIOD 171 Exam study 1 Questions with correct answers

BIOD 171 Exam study 1 Questions with correct answers True/False. A virus is classified as a microbe. - CORRECT ANS-True True or False: The smallest biological unit of life is the molecule. - CORRECT ANS-False What are the four main types of macromolecules found in cells? - CORRECT ANS-Proteins, Lipids, Nucleic Acids, Carbohydrates Proteins are formed from various combinations of [answer1] of which there are [answer2] known forms. - CORRECT ANS-1. Amino acids 2. 20 Define an essential amino acid. - CORRECT ANS-An essential amino acid cannot be produced by the human body and as such must be take in from the environment through alternative sources (i.e) food. What are the two major types of nucleic acids and their roles? - CORRECT ANS-DNA: responsible for the heredity information. RNA: responsible for deciphering DNA and synthesizing proteins. Both are found in the nucleus, but only RNA can leave. Complete the following RNA strand, and indicate how many bonds are formed for each complementary pair: 3' GGUCAUCG 5' 5' CC AGC 3' - CORRECT ANS-3' GGUCAUCG 5' 5' CCAGUAGC 3' There are 2 bonds formed between A and U, and 3 bonds between G and C. The plasma membrane (select all that are true): - CORRECT ANS-Is often a bilayer comprised of lipids Contains hydrophobic tails pointing inward