M1: Module 1 Exam - Requires Respondus LockDown Browser + Webcam 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. False Question 2 3/3 pts True or False: The smallest biological unit of life is the molecule. C True False The smallest biological unit of life is the cell. Question 3 Not yet graded/4 pts What are the four main types of macromolecules found in cells? Your Answer: Proteins, Lipids, Carbohydrates, Nucleic Acids Proteins, Lipids, Nucleic Acids, Carbohydrates Question 4 Not yet graded/3 pts How many different types of amino acids are available from which to make proteins? Your Answer. 20 20 Question 5 Not yet graded/4 pts How many amino acids are classified as being essential amino acids? Your Answer: 9 9 Question 6 Not yet graded / 10 pts Where can the two major types of nucleic acids be found in the cell, and what are their roles? Your Answer: DNA (deoxyribonucleic acid) has the hereditary information and is responsible for the inheritied characteristics in all organisms. RNA (ribonucleic acid) is responsible for deciphering the inheritied information and using it to synthesize protein. DNA is found in the nucleus, mitochondria, and chloroplast. RNA is found in the nucleus, cytoplasm, and ribosomes. While both DNA and RNA can be found in the nucleus (center of the cell), only RNA is capable of leaving the nucleus. 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 Not yet graded / 10 pts Complete the following RNA strand, and indicate how many bonds are formed for each complementary pair: 3' GGUCAUCG 5' 5' CC AGC 3 Your Answer: 3' GGUCAUCG 5 5' CCAGUAGC 3' adesine and uracil form 2 bonds guanine and cytosine form 3 bonds 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): Only restricts movement of materials into the cell Is often a bilayer comprised of lipids Cannot prevent essential nutrients from escaping Contains hydrophobic tails pointing inward Question 9 Not yet graded/5 pts Carbon, hydrogen, and oxygen atoms come together to form what primary macromolecule? Give an example. Your Answer: Caarbohydrates, Glucose Carbohydrates. Any sugar is acceptable: Glucose, sucrose, fructose, galactose, lactose, maltose, etc. Also options: Starch, glycogen, cellulose, or chitin Question 10 3/3 pts True of False: The genetic material within a prokaryotic cell is contained within a membrane-enclosed region. C True False Only eukaryotic cells contain its genetic material within a nucleus. Question 11 Not yet graded/4 pts Describe the 4 basic bacterial morphologies. Your Answer: Coccus-round/spherical Bacillus rod Vibrio-curved rod Spirillum- spiral/corkscrew Coccus (round/spherical), bacillus (rod), vibrio (curved rod) or spirillum (spiral/corkscrew). Question 12 3/3 pts True or False: Archaea is noted for its ability to survive under harsh conditions.

Microbiology Module 1 Exam

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