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WGU C190- Biology Unit 3 Exam Questions and Complete Solutions Graded A+
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WGU C190- Biology Unit 3 Exam Questions and Complete Solutions Graded A+
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WGU C190- Biology Unit 3 ExamQuestions and Complete Solutions
Graded A+
Cell Theory states that... - Answer: - All known living things are composed of one or more cells.
- All new cells are created by pre-existing cells dividing.
- The cell is the most basic unit of structure and function in all living organisms.
Cells exhibit the characteristic of life by maintaining homeostasis. One of the ways in which they do this
is by having a boundary between the cell and the rest of the world.
What is the name of this boundary? - Answer: - Cell membrane
Cells exhibit the characteristic of life by reproducing. Genetic information is passed on to the new cells.
Which cell component is responsible for this process? - Answer: - DNA
Many chemical reactions in the cell occur in the fluid substance that fills the cell.
What is this substance called? - Answer: - Cytoplasm
Prokaryote - Answer: - small, simple cells that make single-celled organisms; bacteria are the most
prevalent kind.
-DNA in prokaryote cells is circular. The DNA molecule loops around on itself, like a rubber band.
Eukaryote - Answer: - larger and more complex cells, and most often they are multicellular organisms,
including plants, animals, and fungi.
, - The DNA in eukaryotic cells is linear. It does not loop around on itself but instead has ends, like a piece
of spaghetti.
- Eukaryotic cells can be part of multicellular organisms, such as plants and animals, but they can also be
single-celled organisms. Some protists, for example, are single celled, making them single-celled
eukaryotic organisms.
Cell Membrane - Answer: - thin, flexible barrier around a cell; controls what enters and leaves the cell
- Present in both prokaryotic and eukaryotic cells.
Ribosomes - Answer: - builds proteins using the information contained in DNA.
- Present in both prokaryotic and eukaryotic cells.
DNA - Answer: - Stores genetic information
- - Present in both prokaryotic and eukaryotic cells.
Cytoplasm - Answer: - Holds the contents of the cell
- Chemical reactions within the cell take place here
- Present in both prokaryotic and eukaryotic cells.
Nucleus - Answer: - Holds the DNA
- Only present in eukaryotic cells
Organelles - Answer: - tiny cell structures that carry out specific functions within the cell
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