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WGU C190- intro to biology, Unit 3 Exam Questions and Complete Solutions Graded A+.
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WGU C190- intro to biology, Unit 3 Exam Questions and Complete Solutions Graded A+.
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WGU C190- intro to biology, Unit 3 ExamQuestions and Complete Solutions
Graded A+
Prokaryote - Answer: small, simple, single-cell organisms.bacteria are the most prevalent kind.
Eukaryotes - Answer: larger, and most often they are multi cellular organisms, including plants, animals
and fungi.
Cell Membrane - Answer: provides a barrier between the interior and exterior of the cell and it regulates
the flow of substances in and out of the cell.
Cytoplasm - Answer: the space in which the chemical reactions that enable life take place. it is the fluid
that occupies the space inside the cell.
Ribosomes - Answer: are the molecular machines that use the instructions contained in the DNA to build
all the proteins needed by the cell.
Unlike eukaryotic cells, prokaryotic cells:
A) have no plasma membrane
B) have RNA but not DNA
C) have no nucleus
D) all of the above - Answer: C) have no nucleus
Antibiotics are medications that are used to fight bacterial infections in humans and other eukaryotes.
Consider the following statements; which one is probably true about antibiotics?
A) Antibiotics are only poisonous to prokaryotic cells.
B) Antibiotics are only poisonous to eukaryotic cells.
C) Antibiotics are poisonous to all cells. This is why you shouldn't take antibiotics very often. - Answer: A)
Antibiotics are only poisonous to prokaryotic cells.
, You find a cell and examine it under a microscope. You are able to see that the cell has a nucleus. What
can you conclude about this cell?
a) the cell is a eukaryote.
b) you cannot draw conclusions given just this information.
c) The cell is a prokaryote. - Answer: a) the cell is a eukaryote.
Which of the following structures is found in BOTH prokaryotes and eukaryotes?
a) Nucelus
b) Mitochondria
c) DNA
d) Ribosome
e) Cytoplasm - Answer: Ribosome, Cytoplasm and DNA.
Nucleus - Answer: Control center of the cell and it stores DNA.
nucelar envelope - Answer: shell enclosing the nucleus that separates it from the cytoplasm, is studded
with pores that allow information from inside the nucleus to enter the cytoplasm.
Cytoplasm - Answer: A jellylike fluid inside the cell in which the organelles are suspended.
mitochondria - Answer: Powerhouse of the cell. converts fuel (glucose) into a form of energy that can be
captured to do work(ATP)
Chloroplasts - Answer: Capture energy from sunlight and use it to produce food for the cell. only found
in plant cells.
Endoplasmic Reticulum (ER) - Answer: An extensive membranous network in eukaryotic cells,
continuous with the outer nuclear membrane and composed of ribosome-studded (rough) and
ribosome-free (smooth) regions.
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