| several questions
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1. What component is present in every part of a loop, such as one
that involves proteins producing energetic molecules from sugar?
A. Raw materials C. Energy absorption
B. Energy release D. Information
2. If you’re using an up-to-date light microscope to examine animal
cells, you won’t be able to detect
A. bacterial-size cell bodies. C. ribosomes.
B. the cell nucleus. D. cell membranes.
3. According to the first law of thermodynamics, _______ can’t be created or destroyed.
A. sugar C. carbon
B. matter D. energy
4. The unit of measurement that scientists use to determine the diameter of an animal cell
is the
5. If you were a plant that wanted to use sunlight to make glucose, which set of additional raw
materials would you require?
6. According to my hypothesis, bacteria that lived millions of years ago communicated by
their body language. In scientific terms, the main problem with my hypothesis is that
A. it fails to explain the phrase body language.
B. it can’t be disproved.
C. it may be false.
D. if it’s proven, our knowledge of bacteria will be disproved.
7. Most of the fruits and vegetables you get from a supermarket are the product of
A. accidental mutations. C. selective bacterial intrusions.
B. gene insertion via bacteria. D. selective breeding.
8. The cells in your body are continuously disassembled and reassembled. Which one of the
following kinds of body cells lasts longest—that is, turns over the least often?
A. Neurons C. Skin cells
B. Liver cells D. Intestinal cells
9. Because water has a relatively low viscosity, it will
A. become heavier as it freezes.
B. allow substances to diffuse through it.
C. have a low heat conductivity.
D. change temperature easily.
10. With respect to the four levels of comparative size presented in your text, which scale does
a typical protein fall into?
A. 1 C. 3
B. 2 D. 4
11. Genes produce instructions only for
A. regulating body processes. C. building body parts.
B. making proteins. D. creating new cells.
12. In bacteria-size mitochondria, both plant and animal cells produce _______, expelling
_______ in that process.
A. glucose, water C. ATP, water
B. glucose, oxygen D. ATP, oxygen
13. If you’re a fat molecule forming the inner layer of a cell membrane, your head will face
toward
A. the watery environment outside the cell.
B. the watery environment inside the cell.
C. either the inside or the outside of the cell.
D. the protein pump in the cell
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