| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.47 |
| Score | 0% | 69% |
In the metric system, what prefix represents 10-3?
centi |
|
milli |
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mega |
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kilo |
In the metric system, milli is the prefix for 10-3.
Generally, an atom has __________ negative electrons orbiting the nucleus as it does positive protons inside.
double the number of |
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fewer |
|
equal numbers of |
|
more |
An electron is a subatomic particle that orbits the nucleus of an atom. It carries a negative electric charge. Generally, an atom has the same number of negative electrons orbiting the nucleus as it does positive protons inside.
In cell biology, where does DNA replication take place?
mitochondria |
|
Golgi apparatus |
|
nucleus |
|
cytoplasm |
The cell nucleus contains the genetic material of the cell and is where DNA replication takes place.
Which of blood component fights infection?
platelets |
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red blood cells |
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plasma |
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white blood cells |
Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.
As part of digestion, the liver produces bile which breaks down:
sugars |
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protein |
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starches |
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fat |
The liver produces bile which emulsifies (separates) fat.