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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+
Features of DNA - Answer: Function: Stores genetic information. Location: Remains in the nucleus.
Structure: Double helix. Sugar: Deoxyribose. Pyrimidines: Cytosine, Thymine. Purines: Adenine, guanine.
Features of RNA - Answer: Function: Involved in protein synthesis. Location: Leaves the nucleus.
Structure: Usually single-stranded. Sugar: Ribose. Pyrimidines: Cytosine, uracil. Purines: Adenine,
guanine.
Actin - Answer: Filament in the Cytoskeleton which has a prominent role in cell movement, maintaining
cell shape, and connection to other cells, as well as intracellular transport.
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.
Cell wall - Answer: Protective layer for prokaryotes, made of peptidoglycan.
central vacuole - Answer: In a plant cell. can be a place of storage, degradation, defense, and even
physical support for the cell.
centriole - Answer: A barrel-shaped structure only present in animal cells. plays a role in the spatial
organization of the cell and cell division.
chloroplast - Answer: In a plant cell. Chloroplasts capture energy from the sun and use that energy to
build sugar molecules.
chromatin - Answer: the material of which the chomrosomes of organisms are composed. Consists of
protein, RNA and DNA
, chromosome - Answer: A single molecule of DNA.
cilium - Answer: a short, microscopic, hairlike vibrating structure. Occurs in large numbers on the surface
of certain cells.
cytoplasm - Answer: the fluid that occupies the space inside the cell. the space in which the chemical
reactions that enable life take place.
cytoskeleton - Answer: formed by a series of protein filaments, and is both a scaffold for the cell
structure and a framework for many cellular activities, including movement and cell division.
endoplasmic reticulum (ER) - Answer: a series of sacs and tubes. put together or assemble the proteins
and other cellular components.
eukaryotic cell - Answer: larger, and most often they are multicellular organisms, including plants,
animals, and fungi.
flagellum - Answer: External appendage to a prokaryote.
fungus - Answer: include molds and mushrooms, are also eukaryotes.
golgi apparatus - Answer: Where the proteins assembled in the ER are delivered to different parts of the
cell, or in multicellular organisms, to different parts of the body.
lysosome - Answer: specialized vesicles found only in animal cells. Contain powerful digestive enzymes
that can recycle cellular parts or destroy external invaders.
microtubule - Answer: Formed by centrioles. filament type of the cytoskeleton. also form appendages
such as the flagellum of the sperm cell and the cilia of the cells of the respiratory system.
mitochondrion - Answer: takes fuel in the form of sugar (glucose) and convert it to usable energy ATP.
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