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Sbi3u Mini Test 2 Unit 1 Answers

1. The document is a mini test on unit 1 which covers prokaryotes, viruses, and protists. It contains multiple choice and short answer questions. 2. Short answer questions ask about examples of plant-like protists, why protists are considered the "junk drawer" kingdom, and details about the protist Plasmodium falciparum which causes malaria. 3. Another short answer question defines transduction as genetic exchange that occurs during the lysogenic cycle when a bacteriophage inserts its DNA into a bacterium.

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167 views2 pages

Sbi3u Mini Test 2 Unit 1 Answers

1. The document is a mini test on unit 1 which covers prokaryotes, viruses, and protists. It contains multiple choice and short answer questions. 2. Short answer questions ask about examples of plant-like protists, why protists are considered the "junk drawer" kingdom, and details about the protist Plasmodium falciparum which causes malaria. 3. Another short answer question defines transduction as genetic exchange that occurs during the lysogenic cycle when a bacteriophage inserts its DNA into a bacterium.

Uploaded by

christon.m
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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SBI3U Mini Test 2 Unit 1

1. Prokaryotes are found in few habitats on Earth __F___


________Prokaryotes are found in many habitats_____________
2. Bacteria that cannot live in environments with oxygen are considered Facultative anaerobes. _F
_______________________________________________________________________
3. The capsule of a protein surrounding a virus is called a capsid. T
______________________________________________________________________
4. Most species of viruses can infect only a single host species. _T
_______________________________________________________________________

5. Malaria is an example of a disease caused by a bacteriophage._F


_________________________________________Protist________________________
6. Blue-Green algae is a photosynthetic protist. F
_________________________Bacteria______________________________________
7. A halophile is an example of a eubacteria. F
______________________Archaea_____________________________________
8. Conjugation is a process involved in the asexual reproduction of unicellular protists. __F
___________________________________________________bacteria
9. The key difference between Lytic and Lysogenic cycle that during the Lytic cycle the
bacteriophage is not active. F_
_____________________Lysogenic cycle___________________________________________

Label the following Diagram:

Short Answer:
1. List any 3 Plant-like protists.
Red dinoflagellates, diatoms, dinoflagellates, euglena, Green algae

2. Why is the Protist Kingdom considered the ‘junk drawer’ of kingdoms?


Scientist use this Kingdom to classify organisms that don’t fit into any of the other kingdoms
(animalia, Plants, Archaea, Eubacteria and Fungi) . It is called the junk drawer, because it is
where organisms are placed when they don’t belong anywhere else.

3. Malaria is a disease in humans that causes more than a million deaths a year.
a. Identify the specific protist that causes malaria
Plasmodium sp.

b. How is malaria spread?


Through mosquitos
c. Briefly describe the lifecycle (use point form)

(see your diagram handout from class)

4. What is transduction? Explain where/when it occurs during the Lysogenic cycle. (You may
include a sketch in your answer)

Transduction is a process of genetic exchange. It occurs when a virus inserts its DNA into a bacteria, thus
making it a bacteriophage. The bacteriophage undergoes the Lysogenic cycle.

Part 3: Fill in the Blanks /10:

Gram Positive Gram Staining Chlamydia Lipopolysaccharide Cyanobacteria nucleus DNA

Gram Negative Meningitis Peptidoglycan Proteobacteria eukaryotes prokaryotes organelles

Bacteria are __Prokaryotes_ that contain no organelles_ and __no nucleus___. Bacterial cell walls
contain a compound composed of peptidoglycan which is useful for scientists when using a gram
staining__. Bacteria that stain pink are called gram negative whereas bacteria that stain purple are
called gram positive A group of gram positive bacteria can be useful for humans such as when used in
yogurt, or can be harmful such as when causing __meningitis__. Another group of bacteria that causes
a disease known as the Bubonic plague is called __proteobacteria__.

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