| Your Results | Global Average | |
|---|---|---|
| Questions | 5 | 5 |
| Correct | 0 | 3.13 |
| Score | 0% | 63% |
In a eukaryotic cell, which organelles deal with proteins?
endoplasmic reticulum |
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ribosomes |
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all of these deal with proteins |
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Golgi apparatus |
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.
Changes to an object's speed or direction of motion are caused by which of the following?
a force |
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work |
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kinetic energy |
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power |
Force is applied to change an object's speed or direction of motion.
In cell biology, what part of the cell contains organelles?
nucleus |
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cell wall |
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cell membrane |
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cytoplasm |
The nucleus of a eukaryotic cell contains the genetic material of the cell and is surrounded by cytoplasm which contains many organelles.
The asteroids in the Kuiper belt are composed of which of the following?
gaseous methane, ammonia, and water |
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minerals |
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rock |
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frozen methane, ammonia, and water |
The Kuiper Belt is similar to the asteroid belt but much larger. Extending beyond the orbit of Neptune, it contains objects composed mostly of frozen methane, ammonia, and water. Most notably, the Kuiper Belt is home to Pluto, a dwarf planet that, until a 2006 reclassification, was considered the ninth planet of the solar system.
The Sun is a __________-type main-sequence star.
E |
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S |
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G |
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D |
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.