*Question*
Q: What proteins synthesized in cells act as catalysts? Read this paragraph and choose the correct option from the provided answers: Chemical reactions constantly occur inside the cells of living things. However, under the conditions inside cells, most biochemical reactions would occur too slowly to maintain life. That's where enzymes come in. Enzymes are catalysts in living things. Like other catalysts, they speed up chemical reactions. Enzymes are proteins that are synthesized in the cells that need them, based on instructions encoded in the cells' DNA. Choices: - hormones - virophages - byproducts - enzymes A:
**Answer**
enzymes

*Question*
Q: In statistics a boundary on the precision and accuracy is known as what? Read this paragraph and choose the correct option from the provided answers: An error is a boundary on the precision and accuracy of the result of a measurement. Some errors are caused by unpredictable changes in the measuring devices (such as balances, rulers, or calipers), but other errors can be caused by reading a measuring device incorrectly or by using broken or malfunctioning equipment. Such errors can have an impact on the reliability of the experiment's results; they affect the accuracy of measurements. For example, you use a balance to obtain the mass of a 100 gram block. Three measurements that you get are: 93.1 g, 92.0 g, and 91.8 g. The measurements are precise, as they are close together, but they are not accurate. Choices: - instance - median - frequency - error A:
**Answer**
error

*Question*
Q: What visual property of soil indicates fertility and nitrogen content? Read this paragraph and choose the correct option from the provided answers: The color of soil indicates its fertility. Black or dark brown soils are rich in nitrogen and contain a high percentage of organic materials. Soils that are nitrogen poor and low in organic material might be gray, yellow, or red. Choices: - texture - contrast - quality - color A:
**Answer**
color

*Question*
Q: What type of plate is an island arc found on? Read this paragraph and choose the correct option from the provided answers: An island arc is a line of volcanoes on an oceanic plate. A continental arc is a line of volcanoes on a continental plate. Choices: - continental - coastal - shear - oceanic A:
**Answer**
oceanic