BIO 171 Microbiology Exam 1

Question 1
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
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
pts
What are the four main types of macromolecules found in cells?
Proteins, Lipids, Nucleic acids and Polysaccharides

Question 4
pts
Proteins are formed from various combinations of [answer1] of which there are [answer2] known
forms.
1. Amino acids
2. 20

Question 5
pts
How many amino acids are classified as being essential amino acids?
9

Question 6
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
pts

Complete the following RNA strand, and indicate how many bonds are formed for each
complementary pair:




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, 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
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
pts
How many carbon atoms are present in the monosaccharide glucose?
6
The molecular formula of Glucose is C6H12O6


Question 10
pts
True of False: Eukaryotic cells do not have a
nucleus. False
Eukaryotic cells do have a nucleus (prokaryotic cells do not).

Question 11
pts
Describe the 4 basic bacterial morphologies.
Coccus (round/spherical), bacillus (rod), vibrio (curved rod) or spirillum
(spiral/corkscrew).

Question 12
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
pts
Animalia, Plantae, Fungi and Protista are all classification under what type of organism?

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