| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.30 |
| Score | 0% | 66% |
In cell biology, where does DNA replication take place?
nucleus |
|
cytoplasm |
|
Golgi apparatus |
|
mitochondria |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
An element in the physical state of __________ maintains a constant volume but their shape depends upon the shape of their container.
solid |
|
plasma |
|
gas |
|
liquid |
In the liquid state, molecules flow freely around each other and exist at a higher temperature range than the same substance in a solid state. Liquids maintain a constant volume but their shape depends upon the shape of their container.
The Sun is a __________-type main-sequence star.
G |
|
S |
|
D |
|
E |
The Sun is a G-type main-sequence star (G2V) but is informally known as a yellow dwarf star. Composed of 73% hydrogen and 25% helium, the hot plasma that makes up the Sun reaches 9,900°F (5,505°C) at the surface. It formed approximately 4.6 billion years ago and makes up 99.86% of the mass in the solar system.
An electrically charged atom is a(n):
ion |
|
proton |
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electron |
|
neutron |
A compound is a substance containing two or more different chemical elements bound together by a chemical bond. In ionic compounds, one atom borrows an electron from another atom resulting in two ions (electrically charged atoms) of opposite polarities that then become bonded electrostatically.
50°F is how many °C?
122 |
|
-10 |
|
58 |
|
10 |
The formula to convert from F° to C° is:
\(C° = {5 \over 9} (F° - 32)\)
plugging in our values gives:
\(C° = {5 \over 9} (50 - 32)\)
\(C° = {5 \over 9} (18)\)
\(C° = {90 \over 9}\)
\(C° = 10\)