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Portage Microbiology Lecture Exam 1 Questions With All Correct Solutions.
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Complete the following DNA strand, and indicate how many bonds are formed for each complementary pair: 3' GGTCATCG 5'5' CC AGC 3' - Answer 5' CCAGTAGC 3' There are two hydrogen bonds between thymine and adenine.There are three hydrogen bonds between cytosine and guanine. In the strand above, ...

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  • October 28, 2024
  • 5
  • 2024/2025
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Portage Microbiology Lecture Exam 1
Questions With All Correct Solutions.
Complete the following DNA strand, and indicate how many bonds are formed for each complementary
pair:

3' GGTCATCG 5'5' CC AGC 3' - Answer 5' CCAGTAGC 3'

There are two hydrogen bonds between thymine and adenine.There are three hydrogen bonds between
cytosine and guanine.

In the strand above, there are eight complementary pairs.



How many amino acids are classified as being essential amino acids? - Answer 9



True or False: The smallest biological unit of life is the molecule. - Answer False



True or False: The genetic material within a prokaryotic cell is contained within a membrane-enclosed
region. - Answer False



What are the four main types of macromolecules found in cells? - Answer Proteins, Lipids, Nucleic acids
and Polysaccharides



True or False: A virus is considered a microorganism - Answer False



Describe the 4 basic bacterial morphologies. - Answer 1. Coccus: bacteria is round or spherical

2. Bacillus: bacteria is a rod shape

3. Vibrio: bacteria is a curved rod shape

4. Spirillum: bacteria is in a spiral or corkscrew shape



True or False: Archaea, a eukaryotic class of microorganisms, is noted for its ability to survive under
harsh conditions - Answer False. They are prokaryotic.

, Where can the two major types of nucleic acids be found in the cell and what are their roles? - Answer
DNA and RNA;

DNA houses hereditary information and determines the inherited traits of a living organism.

RNA is the hereditary information of some microbes, like some viruses. In organisms wherein DNA is the
hereditary material, the function of RNA is to interpret the hereditary information found in DNA and ue
that information to help produce proteins.



What are the two major types of nucleic acids and their roles? - Answer 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.



The plasma membrane (select all that are true):

1. Only restricts movement of materials into the cell

2. Is often a bilayer comprised of lipids

3. Cannot prevent essential nutrients from escaping

4. Contains hydrophobic tails pointing inward - Answer 2, 4



True of False: Eukaryotic cells do not have a nucleus. - Answer False: Eukaryotic cells do have a nucleus
(prokaryotic cells do not).



True or False: Archaea, a eukaryotic class of microorganisms, is capable of surviving harsh environments.
- Answer False: Archaea are prokaryotic bacteria capable of surviving harsh environments.



Which of the following microorganisms are considered to be Eukarya? Select all that apply.

A. Animalia

B. Plantae

C. Fungi

D. Protista - Answer A,B,C,D



The function of the lysosome is (select all that apply):

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