Answer the following question given this paragraph: Some lipids contain the element phosphorus as well as carbon, hydrogen, and oxygen. These lipids are called phospholipids. Two layers of phospholipid molecules make up the cell membranes of living things. In the Figure below , you can see how phospholipid molecules are arranged in a cell membrane. Q: What type of lipids contain the element phosphorus, carbon, hydrogen and oxygen? Choices: - filaments - eukaryotes - alleles - phospholipids A:
phospholipids
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Answer the following question given this paragraph: Elements are either metals, nonmetals, or semimetals. Each group is located in a different part of the periodic table. Another way to categorize the elements of the periodic table is shown in Figure 2.9 "Special Names for Sections of the Periodic Table". The first two columns on the left and the last six columns on the right are called the main group elements. The ten-column block between these columns contains the transition metals. The two rows beneath the main body of the periodic table contain the inner transition metals. The elements in these two rows are also referred to as, respectively, the lanthanide metals and the actinide metals. Figure 2.9 Special Names for Sections of the Periodic Table. Q: Elements are either metals, nonmetals, or what? Choices: - reactive metals - partial metals - unstable metals - semimetals A:
semimetals
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Answer the following question given this paragraph: Non-steroid hormones are made of amino acids. They are not fat soluble, so they cannot diffuse across the plasma membrane of target cells. Instead, a non-steroid hormone binds to a receptor on the cell membrane (see Figure below ). The binding of the hormone triggers an enzyme inside the cell membrane. The enzyme activates another molecule, called the second messenger, which influences processes inside the cell. Most endocrine hormones are non-steroid hormones, including insulin and thyroid hormones. Q: What are non-steroid hormones made of? Choices: - proteins - Molecules - fats - amino acids A:
amino acids
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Answer the following question given this paragraph: Science is a process of knowing about the natural universe through observation and experiment. Q: Science is a process of knowing about the natural universe through what two actions? Choices: - thinking and guessing - changes and experimentation - guessing and observing - observation and experimentation A:
observation and experimentation
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