| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.33 |
| Score | 0% | 67% |
In a eukaryotic cell, which organelles deal with proteins?
Golgi apparatus |
|
ribosomes |
|
all of these deal with proteins |
|
endoplasmic reticulum |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles. Ribosomes produce proteins, endoplasmic reticulum helps synthesize proteins and fats, and Golgi apparatus prepares proteins for use.
The hottest of Earth's atmospheric layers is which of the following?
mesosphere |
|
thermosphere |
|
stratosphere |
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troposphere |
Temperatures again increase with altitude in the thermosphere which is the hottest (4,530 °F / 2,500 °C) atmospheric layer due to direct exposure to the Sun's radiation. However, the gas in this layer is highly diluted so even though the atoms of gas may be very high in temperature, there are too few of them to effectively transfer much heat.
__________ and __________ pair to strengthen bones.
calcium, vitamin A |
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vitamin D, magnesium |
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vitamin D, calcium |
|
iron, calcium |
Vitamin D helps calcium strengthen bones while also aiding muscle, nerve, and immune system function.
A subatomic particle found in the nucleus of an atom. It carries a positive electric charge. This desribes which of the following?
electron |
|
neutron |
|
proton |
|
atom |
A proton is a subatomic particle found in the nucleus of an atom. It carries a positive electric charge.
What part of the nervous system controls simple reflexes?
cerebrum |
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spinal cord |
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medulla |
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autonomic |
The spinal cord connects the brain to the body's network of nerves. It carries impulses between all organs and the brain and controls simple reflexes.