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C190 / C 190 Pre - Assessment V1 (Latest Update 2025 / 2026) Introduction to Biology | Questions and Answers | Grade A | 100% Correct - WGU
Question:
Which two substances form a 50/50 mixture, by mass, in most eukaryotic cell membranes?
Answer:
Lipids and proteins
Question:
Chromosomes are structures that contain hereditary material that will be passed from one generation to the next.
According to this information, which organic molecule must be present in chromosomes?
Answer:
DNA 1 / 3
Question:
Some cells need to maintain a set concentration of Na + and K + ions. These cells are able to do this with the help of the Na/K pump, which transports these ions from areas of low concentration to areas of high concentration (against their concentration gradient). Na + is pumped out, and K + is pumped in.
Which type of membrane transport is involved in this action?
Answer:
Active transport
Question:
A cell has divided its chromosomes into two new nuclei. The cytoskeleton of the cell is currently pinching the cell in the middle to form two new cells.
In which stage of the cell cycle is this cell?
Answer:
Cytokinesis
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Question:
What is the function of the histones during S phase?
Answer:
Organizing and helping to unwind the DNA so the replication enzymes can access it
Question:
How is DNA structured during the metaphase stage of mitosis?
Answer:
The centromere at the center keeps DNA lined up at the cell's equator.
Question:
What is true regarding the transition from metaphase to anaphase during mitosis?
Answer:
Sister chromatids are aligned along the center of the cell and then pulled apart into separate chromatids.
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