BIOD 171 PORTAGE LEARNING EXAM 1- EXAM 5 QUESTIONS AND ANSWERS
EXAM 1
True or False: A virus is classified as a microbe
True.
Viruses are not living and are not considered microorganisms, but can be classified as microbes.
True or False: The smallest biological unit of life is a molecule.
...
True or False: A virus is classified as a microbe
True.
Viruses are not living and are not considered microorganisms, but can be classified as
microbes.
True or False: The smallest biological unit of life is a molecule.
False
The smallest unit of life is a cell.
What are the four main types of macromolecules found in a cell?
Proteins, Lipids, Nucleic Acids and Carbohydrates
How many different types of amino acids are available to make proteins?
20
How many amino acids are classified as being essential amino acids?
9
Where can the two major types of nucleic acids be found in the cell and what are
their roles?
DNA and RNA
They are both found in the nucleus. DNA contains and stores hereditary information and
is responsible for the characteristics of living organisms. RNA is a messenger and
responsible for translating the hereditary information in DNA and synthesizes proteins.
Complete the following RNA strand and indicate how many bonds are formed for
each complementary pair.
5'CCAGUAGC3'
AGU is the missing part. There are two bonds between A and U and 3 bonds between
G and C.
The plasma membrane (select all that are true):
Is often a bilayer comprised of lipids
Contrains hydrophobic tails pointing inward
Carbon, hydrogen, and oxygen atoms come together to form what primary
macromolecules? Give an example.
, Carbohydrates. They come together to form glucose or lactose.
True or False: The genetic material within a prokaryotic cell is contained within a
membrane-enclosed region.
False
Only eukaryotic cells contain its genetic material within a nucleus.
Describe the 4 basic bacterial morphologies.
Coccus (round), Bacillus (rod), Vibrio (curved rod), Spirillum (spiral)
True or False: Archaea is noted for its ability to survive under harsh conditions.
True
Animalia, Plantae, Fungi and Protista are all classification under what type of
organism?
Eukarya
Only Eukarya contains animals, plants, fungi and protists.
Microorganisms classified ____________ obtain most of their energy by
converting light energy into chemical energy.
Plantae
A defining characteristic of fungi is the presence of chitin in the cell walls. Which
of the following also contains chitin? Select all that apply.
Mushrooms, Yeast, Molds
No Bacteria.
True or False: A defining characteristic of Protista is the inability of colonies to
form tissue layers.
True
The function of the lysosome is (select all that apply):
Waste disposal via hydrolytic enzymes
Identify the following cellular components by matching the number with the
description.
1. F (Nucleus)
2. B (Lysosome)
3. E (Plasma Membrane)
4. G (Golgi apparatus)
5. D (Rough ER)
Cell wall are found in which of the following (select all that apply):
Plants, Fungi, Bacteria and Algae
Not Mammalian cells.
The function of the mitochondria is (select all that apply):
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